Intensification and sedentism in the terminal Pleistocene Natufian
Transcription
Intensification and sedentism in the terminal Pleistocene Natufian
Journal of Human Evolution 70 (2014) 16e35 Contents lists available at ScienceDirect Journal of Human Evolution journal homepage: www.elsevier.com/locate/jhevol Intensification and sedentism in the terminal Pleistocene Natufian sequence of el-Wad Terrace (Israel) Reuven Yeshurun a, b, *, Guy Bar-Oz a, Mina Weinstein-Evron a a Zinman Institute of Archaeology, University of Haifa, Mount Carmel, Haifa 3498838, Israel Program in Human Ecology and Archaeobiology, National Museum of Natural History, Smithsonian Institution, PO Box 37012, MRC 112, Washington, DC 20013-7012, United States b a r t i c l e i n f o a b s t r a c t Article history: Received 10 August 2013 Accepted 21 February 2014 Available online 21 March 2014 Measuring subsistence intensification in the archaeofaunal record has provided strong evidence for socioeconomic shifts related to sedentarization in the terminal Pleistocene Mediterranean Basin, but the precise timing and scale of the intensification trend and its place in the evolution of settled societies remain contentious. New archaeofaunal data from the key Natufian sequence of el-Wad Terrace (Mount Carmel, Israel, ca. 15.0e11.7 ka [thousands of years ago]) is used here to clarify and contextualize paleoeconomy and mobility trends in the latest Pleistocene Levant, representing the culmination of Epipaleolithic subsistence strategies. Taphonomic variables serve as supplementary indicators of habitation function and occupation intensity along the sequence. At el-Wad, a very broad range of animals, mostly small to medium in size, were captured and consumed. Consumption leftovers were discarded in intensively occupied domestic spaces and suffered moderate attrition. The Early (ca. 15.0e13.7/13.0 ka) and Late (ca. 13.7/13.0e11.7 ka) Natufian phases display some differences in prey exploitation and taphonomic markers of occupation intensity, corresponding with other archaeological signals. We further set the intra-Natufian taxonomic and demographic trends in perspective by considering the earlier Epipaleolithic sequence of the same region, the Israeli coastal plain. Consequently, we show that the Early Natufian record constituted an important dietary shift related to greater occupation intensity and sedentarization, rather than a gradual development, and that the Late Natufian record appears to be maintaining, if not amplifying, many of these novel signals. These conclusions are important for understanding the mode and tempo of the transition to settled life in human evolution. Ó 2014 Elsevier Ltd. All rights reserved. Keywords: Epipaleolithic Levant Zooarchaeology Broad-spectrum revolution Mobility Contextual taphonomy Introduction The process of settling down by hunter-gatherer groups in the terminal Pleistocene (ca. 20,000e11,700 years cal. BP [calibrated before present]) was an important milestone in human evolution, entailing a series of changes in mobility, economy and society. Sedentary or semi-sedentary groups were emerging in the Mediterranean Basin in the millennia following the Last Glacial Maximum (LGM), displaying novel adaptations and the roots of social complexity. Specifically in the Levant region, the cultural period bridging the LGM and the end of the Pleistocene, the Epipaleolithic, has been a major subject of investigation concerning the formation of complex foraging societies, which eventually laid * Corresponding author. E-mail addresses: [email protected] (R. Yeshurun), guybar@research. haifa.ac.il (G. Bar-Oz), [email protected] (M. Weinstein-Evron). http://dx.doi.org/10.1016/j.jhevol.2014.02.011 0047-2484/Ó 2014 Elsevier Ltd. All rights reserved. the foundations for the subsequent Neolithic Period (e.g., Kaufman, 1992; Bar-Yosef and Meadow, 1995; Henry, 1995; Stiner and Kuhn, 2006; Watkins, 2010; Belfer-Cohen and Goring-Morris, 2011; Maher et al., 2012a). Some of the earliest and most conspicuous manifestations of the pre-agricultural shift to sedentary living appear ca. 15,000e11,700 years cal. BP, in the Late Epipaleolithic Natufian culture of the Levant. These include stone structures and terraces, large cemeteries, diverse groundstone assemblages and hewn bedrock features, plus numerous personal adornments and art items, as well as remains of commensal animals. These traits are much better represented, quantitatively and qualitatively, relative to the earlier Epipaleolithic record, indicating increased permanence of occupation and probably increasingly complex societies and greater human impact on their surroundings (e.g., Garrod, 1957; Henry, 1991; Tchernov, 1993a,b; Valla, 1995; Bar-Yosef, 1998; Belfer-Cohen and Bar-Yosef, 2000; Munro, 2004, 2009; Byrd, 2005; Goring-Morris and Belfer-Cohen, 2008). R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Changes in subsistence go hand in hand with sedentarization in the Mediterranean Basin. While most pre-LGM groups habitually hunted ungulates and paid less attention to small game species, thereby continuing earlier Paleolithic traditions of big-game hunting as the main source of animal food, it is generally accepted that Epipaleolithic, and particularly Natufian groups, intensified their resource base, habitually exploiting juvenile, small or non-terrestrial animals as important dietary components (Davis, 1991, 2005; Tchernov, 1993a,b,c; Stiner et al., 1999, 2000; Bar-El and Tchernov, 2000; Stiner, 2001; Hockett and Haws, 2002; Bar-Oz, 2004; Munro, 2004; Atici, 2009; Munro and Atici, 2009; Stutz et al., 2009; Bar-Yosef Mayer and Zohar, 2010; Stiner and Munro, 2011; Starkovich, 2012; Zeder, 2012). The addition of a suite of animal taxa, many of which are small-bodied or non-terrestrial, to the regular human diet in the millennia just preceding the onset of food production is commonly referred to as the Broad Spectrum Revolution (BSR) (Flannery, 1969). Subsistence intensification and the BSR are important in the wider context of human evolution because of their bearing on siteoccupation intensity in the Epipaleolithic. A strong link exists between increasing sedentism and intensifying subsistence. It is often conceptualized using a behavioral ecology approach, where game taxa may be ranked according to their dietary gains versus search and handling costs. Foragers are likely to habitually procure lowerranked game only when higher-ranked resources become less available (Winterhalder and Smith, 2000; Stiner and Munro, 2002; Munro, 2004, 2009). Economic intensification means that lowerranked prey is regularly included in the diet, presumably because encounter rates with higher-rank prey decrease or because demand for prey increases. During the Epipaleolithic, the ability to reside in a site for longer periods would have meant relying on such intensification, i.e., extracting more nutrients from the environment (Munro, 2009), all the more so if the number of people inhabiting a settlement was higher than before, or if they maintained smaller territories (Rosenberg, 1998). In the Levantine context, low-ranked prey include small and fast-escaping mammals and birds, which provide small quantities of edible material for a high capture cost, as well as juvenile ungulates, which provide less meat and fat than adults (Stiner, 2001; Munro, 2004). Hence, economic intensification can be related to increases in human population in a given territory (Stiner et al., 1999, 2000), but the precise timing and scale of the post-LGM intensification process and its place in the evolution of sedentary societies remain contentious (see below). This study investigates sedentism and economic intensification in the key Natufian base-camp of el-Wad Terrace (Mount Carmel, Israel). This is the classic Natufian sequence where the long-held view of this culture, as a complex and sedentary society at the threshold of farming, was first conceived (Garrod, 1932, 1957). We aim to clarify, refine and contextualize trends in Natufian economy and sedentism by employing detailed zooarchaeological data from our new excavations at the site. Taxonomic abundances, gazelle culling patterns and taphonomic indicators are used to evaluate habitation type, the magnitude of intensification and site occupation intensity. Our results are set in context by comparing the Natufian animal economy with the earlier, well-studied Epipaleolithic sequence of the same region (Fig. 1A). Ultimately, we aim to shed light on Epipaleolithic socioeconomic developments by pinpointing precisely when and how sedentism-related intensification occurred within the long process of settling down in the terminal Pleistocene of Southwest Asia. Intensification and sedentarization processes in the Epipaleolithic The Natufian record of the late Epipaleolithic Levant figures prominently in all discussions of pre-agricultural intensification 17 and sedentarization. Scholarly opinions differ regarding the Natufian phenomenon. Since the early days of research, the large Early Natufian (EN) hamlets displaying architecture, cemeteries, art and abundant groundstone items caused the Natufian to be viewed as a major break from preceding Paleolithic cultures (Garrod, 1957; Valla, 1995; Bar-Yosef, 1998). Based on archaeological criteria such as changes in architecture, mortuary practices and art, an important intra-Natufian difference was noted by some, in that the EN phase (ca. 15.0e13.7/13.0 ka [thousands of years ago]) was considered the classic sedentary phase and the Late Natufian (LN) phase (ca. 13.7/13.0e11.7 ka) was interpreted as having a retreat to greater mobility (Garrod, 1957; Belfer-Cohen and Bar-Yosef, 2000; Bar-Yosef and Belfer-Cohen, 2002). Growing archaeological evidence in the last three decades has placed the Natufian culture in context, demonstrating its Epipaleolithic roots (Kaufman, 1989, 1992; Maher et al., 2012a,b). Recent data from Israel and Jordan indicate prolonged site habitation and the presence of defined huts that were rich in symbolic meaning, echoing the hallmark Natufian features, as early as 23e20 ka, and therefore the EN was viewed as gradually evolving from the preceding Epipaleolithic cultures (Nadel et al., 2004; Maher et al., 2012b). Interpretations of Natufian zooarchaeological data are crucial for understanding the nature of Epipaleolithic sedentarization. However, the timing, mode and tempo of the terminal Pleistocene shift to intensified economy and BSR are often contested or loosely defined. Regarding the well-studied Levantine record, several scholars maintained that the Natufian is exceptional relative to the preceding cultures in the high proportion of small mammals and sometimes birds and fish in conjunction with diminishing proportions of medium and large ungulates (e.g., Davis et al., 1988; Davis, 1991; Pichon, 1991; Bar-Oz, 2004). In contrast, it has been suggested that diversification of Levantine animal economies occurred millennia before the terminal Pleistocene (Edwards, 1989), although this analysis was countered on the basis of inappropriate statistical methods, poor sampling quality and lack of taphonomic consideration (Neeley and Clark, 1993; Bar-Oz, 2004). Several fine-grained archaeofaunal analyses pertaining to Epipaleolithic intensification have recently been published. Combined with multiple lines of archaeological evidence for increased sedentism, the Natufian subsistence trends were interpreted as evidence for intensification and diversification of animal exploitation due to greater permanence of site occupation (Bar-Oz, 2004; Munro, 2004, 2009; Davis, 2005; Stutz et al., 2009). The Natufians not only exploited small game in unprecedented proportions, they began in particular to exploit less cost-effective but resilient animals such as lagomorphs and birds, hinting at novel capture techniques, elevated pursuit costs and rising occupation intensity (Stiner et al., 1999, 2000; Stiner and Munro, 2002; Munro, 2004, 2009). The exploitation of the main ungulate prey, the mountain gazelle (Gazella gazella), was geared towards culling of lower-yield younger individuals, which was taken as another sign of foraging intensification (Munro, 2004, 2009; see also; Davis, 1983, 2005; Bar-Oz, 2004). In some of these studies, it was possible to investigate intra-Natufian trends, which showed that more fast small game was exploited in the EN phase, while in the LN phase slow small game was more dominant (Munro, 2004, 2009; Stutz et al., 2009). Zooarchaeological evidence suggesting Natufian economic intensification was recently viewed as the product of gradual trends throughout the Epipaleolithic, culminating in the Natufian (Munro, 2009; Stutz et al., 2009). Proponents of the ‘gradual transition’ downplayed the BSR hallmark of the Natufian, claiming similarity to earlier Epipaleolithic subsistence (Maher et al., 2012a), or altogether ignoring economic factors when comparing preNatufian and Natufian adaptations (Richter et al., 2011; Maher et al., 2012b). 18 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Figure 1. Provenance of the faunal samples: (A) Location map showing el-Wad and other sites mentioned in the text; (B) Plan of el-Wad in the late Early Natufian (LEN) phase, the main ‘architectural’ phase of the site (after Weinstein-Evron et al., 2013); (C) plan of the NE Terrace excavation e the Late Natufian layer; (D) plan of the NE Terrace excavation e late Early Natufian layer. Note the ‘domestic’ (Structure II) and ‘non-domestic’ (Locus 25) areas. The key sequence of el-Wad Terrace (EWT) is ideally positioned in time and space to shed light on the mode and tempo of terminal Pleistocene socioeconomic shifts pertaining to economic and sedentism. These new data, put in regional context, allow us to contribute to two of the pressing issues in the study of Levantine sedentarization: 1. Did Early Natufian subsistence and mobility patterns constitute a significant break from preceding Epipaleolithic cultures? 2. Was the Late Natufian fundamentally different from the Early Natufian in mobility and subsistence? Framework of analysis Here we provide a detailed taphonomic and zooarchaeological analysis of EWT, identifying the economically important animals and their deposition and preservation patterns. We then put our results in wider diachronic perspective by considering the pre- R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Natufian sites. In such large and complex sites it is quite possible that intra-site depositional mechanisms, type of habitation and topographic factors blur the sought paleoeconomic signals through time (Munro and Grosman, 2010; Yeshurun et al., 2013a, submitted for publication). Thus, we narrow the geographic, ecological and ‘functional’ (e.g., site type) scope by focusing exclusively on a series of Epipaleolithic ‘base-camps’ on the Israeli coastal plain (Fig. 1A). This sequence contains the well-published archaeofaunas of Nahal Hadera V (NHV, Early Epipaleolithic, Kebaran Culture), Hefzibah 7e 18 (HEF) and Neve David (NVD, Middle Epipaleolithic, Geometric Kebaran Culture) and the new results from EWT, presented below (Late Epipaleolithic, Early and Late Natufian Culture). The coastal plain series forms a natural geographic cluster during the Epipaleolithic (Bar-Oz et al., 1999; Bar-Oz and Dayan, 2002, 2003; BarOz, 2004; Bar-Oz et al., 2004). Stiner and colleagues (Stiner et al., 1999, 2000; Munro, 2004) argued that intensification needs to be measured by categorizing animals according to their locomotion and resilience, rather than traditional taxonomic groups. Therefore, the first avenue of investigation examines trends in the taxonomic abundance (based on Number of Identified Specimens, NISP) of small versus big game, larger (medium-size) ungulates versus small ungulates, and fast small game versus slow small game, following Stutz et al. (2009: their Table 4). Stutz et al. (2009) predicted, based on the behavioral ecology approach explained above, that economic intensification would be reflected by: (1) elevated hunting of small game to augment dwindling ungulates; (2) decrease in larger ungulates (primarily fallow deer and aurochs) relative to the more resilient small ungulates (gazelle); and (3) acquisition of fast-escape small animals (e.g., hare and partridge) rather than easily caught but less resilient slowly escaping small animals (e.g., tortoise). These trends may reflect human predation pressure at different scales. As ungulates have larger home ranges than most small game species, they provide a measure of hunting pressure on the regional scale, while small game response to predation may be more local-scale, around the sites themselves (Stiner and Munro, 2002; Munro, 2009, 2012). The second line of inquiry investigates culling patterns (age and sex profiles) of mountain gazelle, the most abundant ungulate prey in the Epipaleolithic of the Mediterranean southern Levant. It has been suggested, based on the same set of considerations as above, that intensifying foragers inflicting predation pressure on gazelle herds will progressively broaden their diet by hunting more lowreturn individuals, such as juveniles and eventually fawns, which provide less meat and fat than adults (Munro, 2004, 2009). The third line of inquiry, which constrains our paleoeconomic inferences, employs taphonomic measures of site occupation intensity to evaluate the habitation type of the different phases in EWT (Yeshurun et al., submitted for publication). These measures include volumetric bone densities and frequencies of post-discard damage such as weathering, animal gnawing, trampling and nonnutritional burning and fragmentation. Volumetric densities serve as rough correlates for the intensity of site use, assuming that, all else being equal, higher quantities of refuse will be discarded when more people inhabit the site for a given time. The magnitude of post-discard destruction processes among the EN and LN samples will serve as an estimate of occupation intensity; a greater number of repeated occupations or more prolonged occupations would have a different taphonomic effect on the faunal remains than short and sporadic occupations. The latter would theoretically display less non-nutritional burning (Stiner and Munro, 2011), reduced rates of trampling and subsequent dry breakage (Haynes, 1983), and more weathering and animal damage as a result of decreased buildup of cultural refuse, leaving the bones exposed for a longer duration (Behrensmeyer, 1978; Kent, 1993; Magdwick and Mulville, 19 2012). These multiple measures, though rough and indirect proxies, are tied to the type of habitation, which we strive to keep as constant as possible when comparing paleoeconomic indices through time. The site and its setting El-Wad Cave is part of the UNESCO World Heritage Site complex of Nahal Me’arot/Wadi el-Mughara that also includes the caves of Tabun, Jamal and Skhul (Garrod and Bate, 1937). The site, a large cave with an adjacent terrace containing a long and rich Early, Late and Final Natufian sequence, is situated on the western face of Mount Carmel, Israel, where the mountain cliff meets the open expanses of the Mediterranean coastal plain, 45 m above modern sea level, within the Mediterranean climatic zone of the Levant (Fig. 1A). The site was first investigated by Lambert in 1928 (Weinstein-Evron, 2009), but became well-known as a result of Garrod’s 1929e1933 excavation campaign (Garrod and Bate, 1937). Garrod’s finds from el-Wad were the foundation of her subsequent definition and interpretation of the Natufian culture as a transitional phase between foraging and fully agricultural life-styles (Garrod, 1932, 1957). The terrace was later revisited (Valla et al., 1986), as was the cave (Weinstein-Evron, 1998). The renewed and on-going excavation was initiated in 1994 and has been focused on the north-eastern part of the terrace (Fig. 1B). An area of ca. 70 m2 was exposed and the attained thickness of Natufian sediments ranges between ca. 0.5 and 1.5 m. Structures, burials and a high density of finds, specifically chipped lithic and groundstone tools, bone tools, bone and shell ornaments, ochre and a rich faunal assemblage were retrieved during the renewed excavation (Weinstein-Evron et al., 2007, 2012, 2013; Yeshurun et al., 2013b). A composite stratigraphy of the site, based on a compilation of data from all excavations (Weinstein-Evron, 2009; WeinsteinEvron et al., 2013), suggests an ephemeral occupation at the base of the Early Natufian (designated Early Early Natufian or EEN), followed by a prolific burial phase comprising almost 100 individuals (Middle Early Natufian or MEN) and culminating with the Late Early Natufian (LEN), the ‘classic’ Early Natufian layer of the site, with its varied architectural features (Figs. 1D and 2). This phase appears as a massive, >0.5 m thick accumulation of repeated occupations. Overlying this architectural phase are thick Early Natufian living levels with a few stone features but normally lacking structures. The Natufian sequence ends with a thinner Late Natufian layer devoid of architecture, but displaying several concentrations of graves (Weinstein-Evron et al., 2007; Bachrach et al., 2013). The Early Natufian occupations (Garrod’s layer B2, our Unit 2) are much thicker and richer than the Late and Final Natufian layers throughout the site (Garrod’s layer B1; here, the upper part of Unit 2 and base of Unit 1). The renewed excavation has exposed an architectural complex in the LEN phase, composed of a 9-m long curvilinear wall (Wall I) encompassing a sequence of at least nine architectural sub-phases, each defined by a thin stony floor. In the area enclosed by Wall I, several partially preserved stone structures and stone-rich ‘living floors’ have been excavated, of which the best preserved is Structure II (Fig. 1D). Several discrete types of Early Natufian architectural contexts were defined: inside Structure II, including stony floors and between-floor fills; outside Structure II, in levels corresponding to some or all of the dwelling floors; the area of Locus 67, a massive stone pile lying northwest of the Structure II area; and Locus 25, an amalgamation of stones outside the living compound demarcated by Wall I (Fig. 1D). A contextual taphonomic analysis indicated meaningful differences in the tempo and mode of deposition of the faunal remains among these contexts, ranging from recurrent deposition of consumption refuse in domestic space in 20 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Figure 2. (A) Section through the NE terrace excavation, corresponding to the NeO line in Fig. 1D. Note the stone architecture (Walls I and II) in the lowest attained levels. The inset depicts the proportions of Helwan-retouched lunates, abruptly-retouched lunates and microburins in each phase (after Weinstein-Evron et al., 2012); (B and C) examples of the EN architecture in the renewed excavation. the first three contexts to an occasional toss area in the last one (Yeshurun et al., submitted for publication). Importantly, the study concluded that the Wall I living area at the heart of the excavation contains discarded fauna in primary deposition in the context of well-preserved architecture, and that post-discard damage was inflicted on the bones as a result of repeated human occupation and a fast rate of accumulation in the same spot. This depositional circumstance caused indirect burning, trampling and nonnutritional fragmentation, in tandem with low weathering and animal gnawing. In contrast, the volumetric density of faunal remains, as well as burning, trampling and fragmentation, is markedly reduced outside of the Wall I compound (Locus 25) and weathering and gnawing appear in elevated proportions, all indicating a non-domestic locale (Yeshurun et al., 2013b, submitted for publication). The distribution of groundstone items, bone tools and micromammal remains generally show similar patterns of intrasite use, namely the discard of used, broken pestles and bone points and consumed rodents in the Wall I complex rather than outside it (Yeshurun, 2011; Rosenberg et al., 2012; Weissbrod et al., 2012). Thirteen radiocarbon measurements on charcoals and ungulate bones yielded a calibrated age range of 14,660e14,030 years BP (1s) for the architecture-bearing phases and a range of ca. 15,000e13,000 years BP (1s) for the entire Unit 2 accumulation (Eckmeier et al., 2012; Weinstein-Evron et al., 2012). The dating of the Late Natufian contexts is underway. The density of finds in the Wall I compound is extremely high, but human remains are virtually absent. The stone structures, numerous living floors, density and diversity of finds and the absence of burials indicate that this part of the site was used primarily for habitation and daily activities in the later parts of the Early Natufian. The character of the site in LN times is less clear; our ensuing comparison to both kinds of EN depositions (dwelling contexts versus Locus 25) will help in tracing the nature of the LN settlement at this part of the site and illuminate changes in site function and intensity of occupation. Materials and methods Sampling The faunal assemblage retrieved by the renewed excavation is vast, and therefore had to be sampled with special attention to the chronological and contextual proveniences. Diachronic archaeofaunal variability was investigated by comparing two subassemblages: an EN sample from the lowest attained phases (the Wall I compound; 9141 identified specimens) against an LN sample from the same spatial location (Unit 1e2 and Phase W-0 in Unit 2, squares OeP/6e7; see Fig. 1C; 2420 identified specimens). In the EN lithic sample, >70% of all lunates are Helwan-retouched, microburins are very rare, and all radiocarbon dates are older than 13,300 years cal BP, in line with other EN occurrences (WeinsteinEvron et al., 2012). In the LN sample, >64% of the lunates are abruptly retouched, and microburins are present in ratios of 1:2 to 1:4 compared with the lunates. In these squares, located in the middle of the excavation, mid-way between the cliff wall and the fall of the talus (Figs. 1 and 2), the deposits attain maximum thickness and are minimally disturbed. Importantly, in these squares no burials were cut into the layer, making in situ preservation more likely than in the east area of the excavation, where eleven LN graves were dug, creating a significant potential for mixture of sediments. Still, the EN sample is much larger than the LN sample by virtue of the much larger magnitude of the former R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 layer. The material in the phases vertically sandwiched between our two samples was left for future investigations, in order to ensure that the EN versus LN samples were as clean and distinct as possible. The good architectural preservation of the lower layers allows the comparison of the LN material with two kinds of EN deposits: inside Structure II, interpreted as a domestic area with consumption refuse in primary deposition, and Locus 25, interpreted as an occasional toss-zone outside the living compound (Fig. 1D; Yeshurun et al., submitted for publication). The geogenic processes contributing to the formation of the strata appear to be similar in both the EN and LN samples in this work. Both are hardly differentiated sedimentologically (Weinstein-Evron et al., 2007), suggesting a similar rate of sedimentation in the central part of the terrace excavation (i.e., the Structure II area in the EN sample, and the studied LN sample). Care was taken not to sample the LN cemetery or other contexts conspicuously different in their ’behavioral’ mode of deposition compared with the EN sample in this study. Faunal analysis procedures All faunal remains in this study were either plotted and packed in the field or retrieved by wet sieving employing 5 mm sieves. The 5 mm sieves were used to separate the zooarchaeological assemblage described here from most of the micromammal remains, which were captured by the underlying 1 mm sieve and are undergoing detailed study (Weissbrod et al., 2005, 2012, 2013). Extremely few recognizable remains of animals larger than micromammals passed through the 5 mm sieve, in line with empirical studies comparing sieving methods (Lyman, 2008). The analysis included reptiles, birds larger than Passeriformes and all mammals except rodents, insectivores and bats. The NISP (defined as fragments whose precise location in the skeletal element, or portion thereof, can be determined and quantified, and can be assigned to species or size class) was as inclusive as possible (see Yeshurun, 2011 for details of skeletal-element identification and counting). Intra- and inter-site taxonomic comparisons in this work are based on the NISP counts (Lyman, 2008). Due to the high fragmentation of the bone assemblage, the majority of identified specimens were assigned to size class rather than species (Table 1). While the assemblage includes large numbers of unidentified fragments (a sample of which was counted and divided by bone type, size and burning for the sake of bone-fracture analyses (Yeshurun, 2011)), all of the following procedures concern the NISP. Body-part profiles were assessed by calculating Minimum Number of Element (MNE; Lyman, 1994) values for each bone portion. Standardizing the MNE by also taking bone side and age into account produced the Minimum Number of Individuals (MNI) figures. All identified specimens except isolated teeth and squamate vertebrae were systematically examined for bone-surface Table 1 Animal groups used in this study. Group Small mammal Small ungulate Medium ungulate Large ungulate Tortoise Lizard/snake Bird Species in the Epipaleolithic assemblages Lepus capensis, Vulpes vulpes, Martes foina, Felis sp., Meles meles, Herpestes incheumon, Vormela peregusna, Canis lupus Gazella gazella, Capreolus capreolus Dama mesopotamica, Sus scrofa Bos primigenius Testudo graeca Ophisaurus apodus Alectoris chukar, Grus grus, Ardeidae, Falconiformes, Strigiformes The dominant species in each group appears in bold. 21 modifications, using a stereoscopic microscope (Olympus SZX7) with a high intensity oblique light source, at 8e56 magnification, following the procedure described in Blumenschine et al. (1996). We searched for cutmarks (Binford, 1981) and hammerstone percussion marks, including conchoidal notches (Bunn, 1981; Capaldo and Blumenschine, 1994; Pickering and Egeland, 2006) and percussion pits and striations (Blumenschine and Selvaggio, 1988; Blumenschine et al., 1996; Pickering and Egeland, 2006). Evidence for bone-working, ubiquitous in many Natufian contexts, was recorded (Campana, 1989). We also looked for carnivore punctures, scoring and digestion marks (Binford, 1981), as well as rodent gnaw marks (Brain, 1981) and biochemical (root) marks (DomínguezRodrigo and Barba, 2006). Trampling striations (Behrensmeyer et al., 1986; Domínguez-Rodrigo et al., 2009; de Juana et al., 2010; Gaudzinski-Windheuser et al., 2010) and abrasion of bone edges (Shipman and Rose, 1988) were sought, and weathering was noted (Behrensmeyer, 1978). Burning presence and intensity were recorded by bone color, generally following Stiner et al. (1995). Bones with external and internal faces were assigned two burning codes according to their external and internal surfaces, in order to discern when in the life history of the specimen burning took place (i.e., fleshed bone, defleshed bone, or cracked bone, following Cain, 2005). The mode of bone fragmentation was assessed by recording shaft fracture-plane typology, shaft circumference and fragment lengths (Villa and Mahieu, 1991; Bar-Oz, 2004), Age-at-death profiles of gazelle, the most prominent game animal in the assemblages, were reconstructed by tooth eruption and wear patterns and by bone fusion, following Munro et al. (2009). We recorded the occlusal wear stages of isolated lower M3, P4 and dP4 teeth and of M3 through P4/dP4 teeth in mandibles (where the M2 and M1 could be distinguished). The tooth eruption and wear data, and epiphyseal fusion data were assigned actual ages according to Munro et al.’s (2009) study of modern mountain gazelle specimens from Israel, and also according to Davis’ (1983) scheme, to ensure the compatibility with older studies. The proportion of gazelle fawns was measured by the unfused proximal epiphysis of the phalanx I, which fuses at approximately five to eight months of age (Munro, 2009). Gazelle sexing was performed using applicable character traits and by multiple measurements, as defined by Munro et al. (2011) for modern, known-sex mountain gazelles from Israel. The character traits used here included horn cores, the caudal wing tip of the atlas and the cross-section of the pubis shaft. Measurements included the relevant portions in the pelvis, atlas, axis, phalanx II, calcaneum, metapodials, tibia and radius (see Munro et al., 2011: their Table 7 for details of the measurements taken on each bone). Additionally, we measured the distal humerus (BT*HDH, following Davis, 1981) to facilitate comparisons with older studies, where it was widely used for reconstructing both sex ratios and body-size (e.g., Davis, 1981; Bar-Oz et al., 2004). Even though this measure is not as sexually dimorphic in gazelles as previously thought (Munro et al., 2011), it may still yield important information on sexindependent body-size patterns. Statistical significance was tested at a ¼ 0.05 level (Shennan, 1988), using PAST freeware (Hammer et al., 2001) and SPSS version 19 software. We employed the c2 distribution for comparing nominal variables, such as the relative abundance of species or taphonomic variables among selected samples. When comparing many variables, Adjusted Residuals (AR) were calculated for each cell and presented along with the composite c2, in order to discern which cells most significantly differ from the expected values. Adjusted Residual values are standard normal deviates, indicating the probability that a single-cell comparison is statistically significant. Significant ARs have values equal to or greater than 2 (Everitt, 1977; see Grayson and Delpech, 2008 for a 22 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 zooarchaeological application). We compared anatomical measurements and bone fragment lengths using Student’s t-test and analysis of variance (ANOVA). For comparing taxonomic diversity and similarity we used the ShannoneWiener Index for Heterogeneity (H), which considers both taxonomic richness and evenness (Krebs, 1989). We used the Evenness Index e (Shannon H divided by the natural log of the number of taxa or categories) for assessing the level of evenness of the values of a given variable across anatomical elements, or the evenness of the relative frequencies of age classes (Faith and Gordon, 2007). The latter analysis was done to quantitatively discern even culling of age-classes from uneven culling, a strategy focusing on the exploitation of one or two age classes (Davis, 1983). Results and preliminary discussion Zooarchaeology and taphonomy of el-Wad Terrace The Natufian of EWT is extremely rich in faunal remains (and other classes of finds), yielding 2100e2500 identified specimens per cubic meter of sediment. Taxonomic spectrum The sample is based on 9141 identified specimens in the EN layer, and 2420 identified specimens in the LN layer, representing a minimum number of 159 and 43 individual animals, respectively (Table 2). The MNI tallies are strongly correlated with the NISP counts (Spearman’s rho: r ¼ 0.92, p < 0.001 and r ¼ 0.90, p < 0.001 for the EN and LN samples, respectively). This tight fit means that the proportional representation of animals of very different build (e.g., ungulates versus tortoises) is not biased due to our identification and counting procedure; for example, tortoise shell counts did not inflate the frequency of this animal. The EN and LN samples are similar in their taxonomic spectrums. Both assemblages are diverse and very uneven (Evenness Index: e ¼ 0.27 and 0.29, respectively). Ungulates are the most numerous group in NISP terms, followed closely by squamates (lizards and snakes). Tortoises and small mammals are frequent, and some birds are also found (Fig. 3). The squamates are very well represented in the assemblages, by their skull pieces and especially vertebrae (Table 2). The only squamate that was identified to species in this study, based on the dentary bone, is the legless lizard (Ophisaurus apodus), a large lizard that may reach 1.2 m in length and weighs 300e600 g (Amitai and Bouskila, 2003). Ungulates make up 42e44% of the assemblages with mountain gazelle (Gazella gazella) being by far the most common ungulate species in both periods. Larger ungulates are rare (Table 2). The spur-thighed tortoise (Testudo graeca) is abundant in both periods. It is represented by numerous carapace, plastron and limb remains. Small mammals are well represented by the Cape hare (Lepus capensis) and by four to seven species of small carnivores, predominantly red fox (Vulpes vulpes) (Table 2). Birds are infrequently represented in both periods (Table 2, Fig. 3). Complementing the faunal spectrum of Natufian EWT, but not included in this study, are numerous micromammals (Weissobrod et al., 2005, 2013), and some fish and marine shellfish. Among the rodents, mole-rats (Spalax ehrenbergi) are very abundant, and their taphonomic, contextual and demographic traits suggest regular consumption by humans (Weissbrod et al., 2012). Fish are present along the sequence. Desse (in Valla et al., 1986) identified four families of Mediterranean fish (Sparidae, Serranidae, Mullidae and Muglidae) from the 1980s soundings at EWT. The fish from the recent excavation are yet to be studied; thus far Sparidae have been tentatively identified (I. Zohar, Personal communication). The presence of these taxa suggests exploitation of the Mediterranean coastal plain and estuarine zones (Bar-Yosef Mayer and Zohar, 2010). Large and rich assemblages of marine shells were Table 2 Taxonomic composition of the EWT assemblages. Early Natufian Late Natufian NISP MNI NISP MNI Ungulates Gazella gazella Capreolus capreolus Small ungulate Dama mesopotamica Sus scrofa Medium ungulate Bos primigenius Large ungulate Fetus/neonate ungulate 1068 2 2873 24 42 88 5 6 3 43 1 300 1 697 3 6 7 7 1 1 11 1 Small mammals Lepus capensis Smal mammal-indet. (1) Vulpes vulpes Canis lupus Martes foina Felis sp. Meles meles Herpestes incheumon Vormela peregusna Small carnivore-indet. 231 212 186 20 19 25 11 2 1 112 17 30 32 43 3 6 3 2 2 1 1 43 1 2 3 2 3 6 7 14 1 10 1 1 1 1 1 1 1134 78 481 2424 12 9141 38 13 Birds Alectoris chuckar Grus grus Ardeidae Falconiformes-small Falconiformes-medium Falconiformes-large Strigiformes Raptor (indet.) Bird-medium Bird-large Reptiles Testudo graeca Ophisaurus apodus (2) Lizard (3) Snake (3) Squamata (indet.) (4) Total 2 2 1 7 2 2 3 1 1 1 1 1 2 3 27 5 1 1 1 1 1 2 9 303 10 94 834 4 2420 11 2 1 Notes: (1) May include remains of small carnivores; (2) All skull and jaw fragments; (3) All vertebrae; (4) All jaws. retrieved, including edible mollusks, such as the Mediterranean limpet Patella caerulea (Weinstein-Evron et al., 2007; Bar-Yosef Mayer and Zohar, 2010). Vertebrate taphonomy Counts of bone-surface modifications in the EN and LN samples are grouped by the four mammal size classes (small mammal, small ungulate, medium ungulate, and large ungulate), the tortoises, birds and squamates (Table 3). Since the squamates were not subjected to systematic microscopic inspection, only burning data are given for them. Bone-surface modification data indicate that the assemblages overwhelmingly constitute butchered, consumed and discarded animal remains, which consequently underwent some pre- and post-burial destruction processes. Cutmarks related to all butchery stages, and especially dismemberment and filleting, attest to the exploitation of all ungulates, hare, fox and tortoises as food. A modest amount of carnivore ravaging affected the assemblages, probably by a small-medium carnivore. Subsequently, some of the skeletal elements suffered moderate exposure related damage attested by weathering, physical abrasion, rodent gnawing, and trampling. Burning (indicated by bone color) appears on 27% of NISP in the EN sample and on 24% of NISP in the LN sample. A sample of unidentified small ungulate specimens from the EN layer yielded an identical proportion of burned bones, 27% (1553 of 5670 specimens R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Figure 3. Taxonomic composition based on lumping species and size-classes into higher taxonomic groups: (a) EN sample; (b) LN sample. >8 mm in maximum dimension). In spite of the fact that bone burning is abundant in EWT, burning intensity is not high. To quantify bone burning, we used the Combustion Index (CI) defined by Costamagno et al. (2005). The index values range from 0 (no burned bones) to 1 (when all specimens are calcined), and thus measures both burning frequency and intensity. The CI of the entire assemblages is 0.10e0.11, reflecting moderately burned bones in both periods. Looking at burning intensity by taxonomic group, the squamates display the highest burning intensity (highest CI) during both periods, with as much as 7e8% calcined bone. Birds display the least burning, while small mammals, small ungulates and tortoises display similar CI values (Table 4). In the gazelle size class, the distribution of burning by skeletal element is quite even and does not correlate with food utility. Numerous cortical and compact bones (limb shafts, toes, teeth, carpals/tarsals) display burning, and therefore preferential burning of fat-rich portions cannot be demonstrated (Table 5). Additionally, in both the EN and LN samples, most shaft fragments were burned to a similar intensity on their exterior and interior surfaces, meaning that the bone was burned when already defleshed and fractured. Nevertheless, a significant difference exists between the two samples in that during the LN a considerable number of shafts exhibited burning with greater intensity on the exterior (25% in the LN versus only 10% in the EN; c2 ¼ 12.49, p ¼ 0.002; Table 5). Hence, it seems that the majority of ungulate gazelle bone burning in EWT, especially in the EN sample, was unintentional, in accordance with lighting of hearths on pre-existing refuse, thereby unintentionally inflicting secondary burning on bones buried underneath (Stiner et al., 1995; see also; Hardy-Smith and Edwards, 2004). The averaging pattern of such an activity in the faunal assemblages would eventually lead to near-uniform burning intensity 23 and frequency on different skeletal parts, probably masking some of the effects of roasting body-parts or heating bones for marrow extraction. The analysis of breakage patterns was conducted on mammal limb bones and phalanx I specimens, yielding largely similar results for both periods (Table 3). Green, or fresh, fractures, attributed to deliberate fracturing by humans or carnivores to access the bone marrow, appear on 42e44% of the small mammal and ungulate bones. This sizeable proportion is in line with a processed assemblage that subsequently suffered additional cycle/s of breakage while the bones were already dry, resulting in intermediate and dry breaks amounting to more than half of the specimens (Villa and Mahieu, 1991). Gazelle mortality profiles Mortality profiles were constructed for gazelles by three tooth eruption and wear series and by two bone fusion methods (following Davis, 1983; Munro et al., 2009). The raw tooth-wear and bone fusion data are presented in Supplementary Online Material [SOM] Tables A.1 and A.2, and five different methods for presenting age data are compared in Fig. 4. In the EN sample, the three tooth eruption and wear series indicate a low number of juvenile (<18 months) gazelles, amounting to 10e18% of ageable specimens. A more detailed mortality profile, covering the entire life-span of the animal, indicates the overwhelming preponderance of adult animals, 18e96 months of age, along with a few fawns and juveniles (2e18 months) and one very old animal (>96 months) in the EN sample (Fig. 4). However, the picture changes when bone fusion is examined, indicating a much larger proportion of juveniles (34e53%). The most recently published and refined bone fusion method, based upon a large sample of known-age gazelles from Israel, diverges in the most marked way from the values obtained by tooth eruption and wear (both following Munro et al., 2009). The skeletal elements advocated by Munro et al. (2009) as being comparable to the dP4P4/M3 replacement and the attainment of adult body size are the proximal humerus, proximal tibia and distal radius (MNE ¼ 17 in the EN sample), while the older and widely used method of Davis (1983) employs the summation of fused and unfused distal radii, metapodials, tibiae, femora and the tuber calcis (MNE ¼ 104 in the EN sample). The results of the LN sample show a much sounder agreement among tooth eruption and wear and bone fusion methods, even though the samples are smaller than the EN sample (Fig. 4). All age presentation methods indicate that a significant portion (31e50%) of the culled gazelles were juveniles. Notably, Davis’ (1983) and Munro et al.’s (2009) bone-fusion methods generate nearly identical figures here (31% and 33% juveniles, respectively) and the proportion of juveniles is lower when presented by bone fusion than by tooth eruption and wear, in contrast to the situation in the EN sample. The detailed dentition-based sequence points to culling of just two age groups, in equal proportions: fawns (two to seven months of age) and young adults (18e36 months). The marked discrepancy between the dental eruption and wear and the bone fusion methods in the EN sample is difficult to reconcile. Juvenile epiphyses could be less well preserved because of their greater porosity, and epiphyses in general may be underrepresented in relation to teeth in an assemblage that suffered density-mediated attrition and carnivore ravaging. This bias is expected to reduce the number of juveniles in the bone fusion method compared with the tooth wear method, but the age profiles exhibit the reverse pattern, namely a much larger representation of juveniles by epiphyseal fusion. Looking at the EN bone fusion results more closely (SOM Table A.2), it appears that early-fusing elements are usually found fused and that the high juvenile ratio stems from the late-fusing elements. For example, the fusion state of the proximal phalanx I 24 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Table 3 Bone-surface modifications and bone fracture patterns for all taxonomic groups: (a) Early Natufian sample; (b) Late Natufian sample. A (a) NISP Burning Green fracture Dry fracture Intermediate Limb shaft circumference Weathering (stage 3e5) Cutmarks Percussion marks Working Gnawing (carnivore) Gnawing (rodent) Root-marks Trampling striations Abrasion (b) NISP Burning Green fracture Dry fracture Intermediate Limb shaft circumference Weathering (stage 3e5) Cutmarks Percussion marks Working Gnawing (carnivore) Gnawing (rodent) Root-marks Trampling striations Abrasion Small mammal Small ungulate Medium ungulate Large ungulate Tortoise Lizard and snake Birds Total n % n n n <50 >50 100 n of % n % n of % n % n % n % n % n % n % 819 212 25.9% 20 18 10 22 0 56 6 749 0.8% 21 2.8% 0 78 0.0% 0 0.0% 17 2.3% 8 1.1% 215 28.7% 23 3.1% 27 3.6% 3943 1027 26.0% 328 233 172 900 8 42 70 3775 1.9% 239 6.3% 108 1616 6.7% 91 2.3% 212 5.6% 63 1.7% 1238 32.8% 299 7.9% 169 4.5% 154 32 20.8% 10 14 10 39 0 4 8 136 5.9% 14 10.3% 3 71 4.2% 2 1.3% 8 5.9% 3 2.2% 55 40.4% 15 11.0% 2 1.5% 11 3 27.3% 1 0 0 1 0 0 2 10 20.0% 1 10.0% 0 1 0.0% 0 0.0% 1 10.0% 0 0.0% 5 50.0% 2 20.0% 0 0.0% 1134 279 24.6% 2995 929 31.0% 83 11 13.3% 9139 2493 27.3% 4 1132 0.4% 6 0.5% 0 0 30 1 83 1.2% 3 3.6% 0 0.0% 14 1.2% 4 0.4% 185 16.3% 11 1.0% 13 1.1% 1 1.2% 0 0.0% 0 0.0% 17 20.5% 2 2.4% 5 6.0% 962 8 132 91 5885 1.5% 284 4.8% 111 1766 6.3% 94 1.0% 252 4.3% 78 1.3% 1715 29.1% 352 6.0% 216 3.7% n % n n n <50 >50 100 n of % n % n of % n % n % n % n % n % n % 143 31 21.7% 2 3 1 2 0 7 0 132 0.0% 5 3.8% 0 9 0.0% 0 0.0% 2 1.5% 3 2.3% 41 31.1% 3 2.3% 7 5.3% 998 267 26.8% 83 71 42 190 1 11 48 965 5.0% 39 4.0% 13 346 3.8% 16 1.6% 61 6.3% 14 1.5% 326 33.8% 76 7.9% 39 4.0% 16 2 12.5% 0 1 1 2 1 0 1 15 6.7% 2 13.3% 0 7 0.0% 0 0.0% 0 0.0% 0 0.0% 8 53.3% 1 6.7% 1 6.7% 8 1 12.5% 0 0 0 0 0 0 0 4 0.0% 1 25.0% 0 1 0.0% 0 0.0% 1 25.0% 0 0.0% 4 100.0% 1 25.0% (which fuses at five to eight months) indicates 13% fawns, closely replicating the lower proportion of juveniles obtained by the dental methods. Thus, it may be that near-adult specimens were misidentified as young-adults in the tooth wear methods. Moreover, the modern tooth eruption and wear, and bone fusion sequences were derived from captive animals (for which known ages at death exist), and these could exhibit somewhat different wear patterns due to different diets, and/or varying rates of growth and development due to their captive status. This suggestion is 0.0% 303 57 18.8% 942 217 23.0% 9 0 0.0% 0 303 0.0% 0 0.0% 0 0 4 0 9 0.0% 0 0.0% 1 0.3% 4 1.3% 2 0.7% 84 27.7% 4 1.3% 6 2.0% 0 0.0% 0 0.0% 0 0.0% 3 33.3% 0 0.0% 1 11.1% 2419 575 23.8% 85 75 44 194 2 22 49 1428 3.4% 47 3.3% 13 363 3.6% 17 0.7% 68 4.8% 19 1.3% 466 32.6% 85 6.0% 54 3.8% obviously hard to test without more actualistic data. Presently, we draw on the fact that the high juvenile ratio is caused by late-fusing elements to suggest that adults, as well as animals that nearly reached adulthood and were osteologically immature, were primarily culled during the EN. The detailed tooth wear series point to ‘even culling’ of various age classes (e ¼ 0.712), with special emphasis on adults, during the EN. Conversely, during the LN fewer age classes were targeted (e ¼ 0.387) and more juveniles were captured. R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Table 4 NISP counts of bones burned to various degrees and the Combustion Index for each taxonomic group. Unburned Brown Black Gray White Total Combustion NISP index Early Natufian Small mammal Small ungulate Med. ungulate Large ungulate Tortoise Lizard and snake Bird Total Late Natufian Small mammal Small ungulate Med. ungulate Large ungulate Tortoise Lizard and snake Birds Total 607 2913 122 8 855 2058 127 607 22 2 160 408 71 328 7 1 99 275 11 62 2 0 11 187 3 40 1 0 8 59 819 3950 154 11 1133 2987 0.10 0.10 0.07 0.09 0.09 0.15 71 6634 6 1332 4 785 1 274 0 111 82 9136 0.05 0.11 112 731 14 7 246 725 16 154 2 0 32 72 14 96 0 0 22 72 0 7 0 0 3 56 1 10 0 1 17 143 998 16 8 303 942 0.08 0.10 0.03 0.13 0.07 0.12 9 1844 0 276 0 204 0 66 0 29 9 2419 0.00 0.10 Using the dP4eM3 series results, the LN sample is much more biased towards juveniles younger than 18 months than the EN sample, a difference that is statistically significant (c2 ¼ 5.43, p ¼ 0.02). These figures can be cautiously interpreted using the drive counts conducted monthly by Baharav (1974) between November 1971eNovember 1972 on living gazelle herds in Ramot Yissakhar (southeast Galilee, Israel; Baharav’s year-round averages of the proportions of age classes and sexes are used here, because they are reasonably comparable with the zooarchaeological data). The modern counts indicated that the proportion of juveniles (18 months of age) in living herds is approximately 45% on a year-round average. The low juvenile proportion in the EN sample diverges significantly from the natural age structure (c2 ¼ 5.40, p ¼ 0.02), highlighting the special emphasis on adult culling in that period. Conversely, the LN proportion of juveniles is similar to a natural herd structure (c2 ¼ 0.07, p ¼ 0.78; see also Bar-Oz et al., 2004). Gazelle sexing The sexing results of the character traits show a marked male bias in both periods (Fig. 5; SOM Table A.3) stemming mainly from horn cores. This element is unmistakably dimorphic but its utility for reflecting the actual sex ratios of the hunted population has been questioned, because male horn cores are Table 5 Characteristics of burned specimens in the small ungulate group. Early Natufian Evenness index for the anatomical distribution of burning Correlation FUI*element burning Limb burning Two sides equally burned Exterior more burned Interior more burned Burned bone end Burned bone shaft Comparison end*shaft Comparison of fragment lengths N: Mean: Var.: T Late Natufian 0.98 0.99 r ¼ 0.29, p ¼ 0.274 r ¼ 0.03, p ¼ 0.502 NISP 308 37 25 166 36.6% 208 30.0% 2 c ¼ 5.35, p ¼ 0.024 Burned Unburned NISP NISP 991 2523 19.662 23.972 131.06 313.44 8.51 (p < 0.001) NISP 39 15 6 39 31.7% 23 20.7% 2 c ¼ 3.61, p ¼ 0.057 Burned Unburned NISP NISP 257 627 17.222 19.742 47.853 109.82 4.19 (p < 0.001) 25 much more robust than female horn cores, possibly reflecting a preservational difference, and because of the possibility that male horn cores had been used as raw material and therefore might have been preferentially cached in the habitation area (Munro, 2001; Bar-Oz, 2004). While no evidence exists for horn core caches in el-Wad, ca. 10% of these elements bear traces of fabrication (Yeshurun, 2011) and some finished artifacts made of horn were discovered elsewhere at the site (Garrod and Bate, 1937; Weinstein-Evron, 1998). On the other hand, contextual taphonomic analysis of the EN layer showed that both bone tool production waste and unmodified butchery refuse are present in the living surfaces investigated here, with little evidence of removal of selected skeletal elements, especially not small and non-obstructing elements such as female horn cores, from the habitation area (Yeshurun et al., submitted for publication). Nevertheless, the male-dominated picture is augmented by the only other available character trait in the samples, the pubic shaft, displaying four male elements versus one female element in the EN sample (SOM Table A.3). Only one sexable (male) pubis shaft was available in the LN sample. An additional avenue is sexing by osteometrics, which necessitates an investigation of general body-size variability (see SOM Table A.4 for the raw gazelle measurement data). Two skeletal elements that provide a sufficient number (n > 5) of measurements in both the EN and LN samples are the distal humerus (BT and HDH, following Davis, 1981) and the phalanx II (GL, Bd and Dd, following Munro et al., 2011). The measurements on these elements are independent of age and taphonomic processes, since only fused, unburned and unabraded elements were measured (von den Driesch, 1976). Additionally, no significant intra-individual size difference is evident for the phalanx II (Munro et al., 2011). All five measurements either show significantly higher means in the EN sample, or statistically similar means, while no measurement provided a higher mean value in the LN sample (SOM Table A.5). Plotting the phalanx II measurements (greatest length versus distal depth) in both samples revealed that the EN gazelles are divided into two size groups, with the LN gazelles corresponding with the smaller one (Fig. 6). Thus it seems that EN gazelles possessed a larger mean body-size compared with LN gazelles, and that a potential cause may be shifting sex ratios in favor of females in the LN. The samples that were measured and sexed using the discriminate functions, following Munro et al. (2011) (altogether 42 specimens in the EN sample and 14 in the LN sample) yielded results that were mostly larger than the female/male cutting point for the modern specimens in the EN sample, and mostly smaller than the cutting point in the LN sample (SOM Table A.4; cutting points follow Munro et al. (2011)). Had the EWT gazelles been identical in size to modern Israeli gazelles, the assemblages would be composed of 81% males in the EN sample and 43% males in the LN sample, a statistically significant difference (c2 ¼ 7.47, p < 0.01). However, it is possible that Natufian gazelles differed in size compared with present-day gazelles, which could cause the cutting point to be too low and to misidentify large females as males. A possible solution to separate body-size trends and sex ratios would be to determine if EN and LN gazelle body-size differed significantly from the modern Israeli gazelles that were used to determine the sexing functions. This comparison (Table 6) indicates that EN gazelles usually possess a similar body-size to modern males and are significantly larger than modern females, while LN gazelles exhibit the reverse pattern, being significantly smaller than modern males but as large as modern females. Importantly, neither the EN nor LN gazelles display larger body-size compared with modern males, or smaller body-size than modern females (Table 6). This indicates that the range of gazelle body-size in the EN and LN was un-skewed compared with present-day gazelles, lending some 26 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Figure 4. Gazelle aging. Left: juvenile-adult ratios based on five bone-fusion or tooth-wear series. Bone fusion 1 refers to the elements fusing at 18 months, equivalent to the dP4-P4/ M3 replacement (following Munro et al., 2009). Bone fusion 2 follows the traditional method by Davis (1983), which includes more elements. Sample size is indicated to the right of each bar; Right: detailed mortality profile using the dP4eM3 series, based on tooth NISP. The numbers in parentheses indicate age in months. support to the inter-period body-size difference in EWT as indeed stemming from shifting sex ratios. According to phalanx II measurements, male gazelles dominate the EN assemblage by ratio of approximately 4:1 while males and females are similarly represented in the LN, perhaps with females slightly dominating. The inter-period difference in sex ratios is highly significant (EN versus LN: c2 ¼ 7.47, p < 0.001). Baharav’s (1974) drive counts indicated that in modern Israeli herds, females outnumbered males by a ratio of 100:81 in a year-round average (see also Baharav, 1983). Thus, the EN sex ratios differ significantly from the sex ratios of living herds (c2 ¼ 17.89, p < 0.001), indicating specific targeting of males. On the other hand, the LN sample is similar to the living herd in this respect (c2 ¼ 0.02, p ¼ 0.90), meaning that LN hunters culled gazelles with no preference to sex. Taphonomic markers for occupation type: Early versus Late Natufian Several taphonomic markers were defined above for gauging site-occupation intensity through the Natufian sequence of EWT. We compare the LN with two different EN accumulations (described above), displaying clearer contextual (architectural) patterns: a domestic faunal assemblage in primary deposition following consumption activities on the spot versus Locus 25, a non-domestic area beyond the living compound, containing occasionally-tossed consumption refuse (Yeshurun et al., submitted for publication). The comparison results (Table 7) show that the volumetric density of faunal remains by total bone mass is highest in the domestic EN and about half of that in Locus 25 and in the LN. When the volumetric densities of NISP counts are taken into account, the phalanx II Dd (mm) 14 13 12 11 10 9 8 18 Figure 5. Gazelle sexing by character traits. 20 22 24 phalanx II GL (mm) 26 28 Figure 6. Gazelle sexing by body-size: comparison of phalanx II measurements in the EN (black diamonds) and LN (gray squares) samples. R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Table 6 Summary of the comparisons of Early Natufian (EN) and Late Natufian (LN) gazelle measurements with modern male and modern female gazelle measurements. BT GL Bd Dd Dd tibia humerus phalanx II phalanx II phalanx II EN compared with modern EN compared with modern LN compared with modern LN compared with modern No diff. No diff. No diff. No diff. No diff. No diff. Larger Larger Larger Larger Smaller Smaller No diff. Smaller No diff. No diff. Larger No diff. male female male female Raw measurements and t-test results are detailed in SOM Tables A.5 and A.6. Modern gazelle measurements were taken from Munro et al. (2011: their Table 3). difference among the domestic EN and the LN is less dramatic, while Locus 25 still lags behind. The NISP-based counts of bone modifications (e.g., burning, gnawing, etc.) are transformed into Adjusted Residuals (AR) in order to assess which counts significantly diverge from the expected values. Some significant differences are evident in the statistical comparison (Fig. 7; see SOM Table A.7 for details, AR values and composite c2 results): sub-areal weathering is significantly higher in the Locus 25 and LN samples compared with the domestic EN, attesting to slower rate of sediment build-up. On the other hand, carnivore gnawing is significantly underrepresented in the LN. The slow-accumulating material in Locus 25 displays both higher weathering and more intense carnivore gnawing compared with the LN sample. Boneburning measures are similarly represented in the LN compared with the domestic EN. In contrast, burned bones are significantly underrepresented in Locus 25. Finally, trampling is significantly overrepresented in the domestic EN sample and significantly underrepresented in the LN sample. Post-discard fractures (defined here as the ‘dry’ and ‘intermediate’ fracture categories combined) are significantly underrepresented in Locus 25 but similarly distributed in the domestic EN and in the LN samples (Fig. 7, Table 7). To conclude, the taphonomic measures of occupation intensity position the LN as intermediate between the EN domestic and nondomestic samples. Some important characteristics such as bone burning and breakage align the domestic EN and the LN, highlighting the similarity in post-discard destruction processes and consequently, the degree of occupation repetitiveness and type of habitation. This similarity, in turn, helps to keep site type as constant as possible and renders the inter-phase paleoeconomic comparison more robust. Table 7 Comparison of taphonomic markers for occupation intensity among the Early Natufian (EN) and Late Natufian (LN) samples. Bone mass (gr)/m3 NISP count/m3 Weathering (long bones) Carnivore gnawing Rodent gnawing Trampling striations Burning (total) Indirect burning (shafts) Dry þ intermediate fractures EN domestic area (inside Structure II) EN occasional toss area (Locus 25) LN 15,267 2716.54 13 (2.5%) 9883.89 1738.61 4 (14.3%) 106 (6.2%) 35 (2.1%) 136 (8.0%) 944 (23.5%) 136 (84.0%) 11 (10.7%) 4 (3.9%) 8 (7.8%) 35 (12.0%) 2 (67.0%) 68 (4.8%) 19 (1.3%) 85 (6.0%) 575 (23.8%) 45 (75.0%) 149 (58.0%) 16 (36.0%) 119 (58.0%) 7708.57 2180.95 25 (8.8%) Excavation volumes were not available for all units, so the faunal remains from these units were excluded from calculations. 27 El-Wad in diachronic context A broader perspective of intra-Natufian economic trends is achieved by comparing the entire Epipaleolithic sequence of the Israeli coastal plain, including the Kebaran site of Nahal Hadera V (Bar-Oz and Dayan, 2002), the Geometric Kebaran sites of Hefzibah (Bar-Oz and Dayan, 2003) and Neve David (Bar-Oz et al., 1999), and the Early and Late Natufian faunas of EWT presented above. All of these sites are positioned in a north-south strip along the Mediterranean coastal plain of Israel, ca. 40 km long, representing dense anthropogenic accumulations of vertebrate faunas and other cultural refuse. Their zooarchaeology and taphonomy were published in detail (Bar-Oz, 2004) using compatible methods to the ones employed here. Taxonomic abundances in the Epipaleolithic coastal plain The EN and LN phases of EWT are generally similar in the presence and abundance of taxa, but some variations do occur. Rather than focusing on particular differences in relative abundances of certain taxa, which are sometimes difficult to interpret and may stem from differing sample sizes or other idiosyncrasies, the taxonomic abundances are evaluated here using Stutz et al.’s (2009) indices, described above. Our results indicate no gradual temporal trends (as interpreted by Stutz et al., 2009); rather, marked differences characterize the pre-Natufian and Natufian assemblages, regardless of chronological position of the sample within this division (Fig. 8, Table 8). The notable differences amongst the preNatufian and Natufian strata, namely the increase in small game and the dwindling numbers of larger ungulates, overshadow the subtle differences that exist among the Early and Late Natufian phases of EWT. The fast small game index declines during the Natufian of EWT, while the slow small game index remains constant in the EN-LN comparison. Gazelle culling patterns in the Epipaleolithic coastal plain Detailed investigations of gazelle age and sex profiles at EWT provide a picture of shifting culling patterns through the Natufian sequence. Putting the EWT results in broader Epipaleolithic perspective, the pre-Natufian gazelle culling trends are summarized in Table 9. The proportion of juveniles in the Kebaran and Geometric Kebaran faunas is 24e39%, higher than the Early Natufian EWT (18%). However, only the Neve David assemblage significantly differs in this respect from the natural herd age structure (c2 ¼ 9.73, p ¼ 0.001). Nahal Hadera V and Hefzibah 7e18 do not differ from a natural herd, as also Late Natufian EWT (c2 ¼ 1.07, p ¼ 0.30 and c2 ¼ 0.35, p ¼ 0.55, respectively). The evenness of age classes is similar across all assemblages (e ¼ 0.671e0.712) except for the markedly low value of the LN sample from EWT (Fig. 9). Additionally, the proportion of gazelle fawns (about six months old or less), measured by the proportion of unfused to fused proximal phalanx I, is variable, reaching 18% at the most in the LN assemblage. Notably, fawns increase significantly from the earlier Epipaleolithic to the Natufian (Fig. 9; pooled pre-Natufian versus pooled Natufian: c2 ¼ 11.66, p < 0.001). Since the average yearround proportion of fawns in living herds is about one-seventh of the population (Baharav, 1974), the low pre-Natufian proportion of fawns significantly differs from living herds (c2 ¼ 10.92, p < 0.001) while the Early and Late Natufian assemblages sample fawns according to their living abundance (c2 ¼ 0.25, p ¼ 0.62). Sex ratios, reconstructed by body-size in comparison to knownsex gazelle collections, again showed an inter-phase difference in EWT: male culling in the EN versus unselective culling of sexes in the LN. Comparison with the pre-Natufian Epipaleolithic of the same ecological region can help separate conflating factors that affect body-size (Bar-Oz, 2004). Gazelle body-size trends were evaluated using the humerus BT measurement, a relatively wellpreserved portion that was measured in previous studies. Results 28 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Total big game index Early Natufian - domesƟc Adjusted Residuals 6 4 2 0 -2 -4 -6 Early Natufian - non-domesƟc Adjusted Residuals 6 NHV 4 2 -2 -4 -6 Late Natufian 6 Adjusted Residuals NVD Large big game index 0 4 2 0 -2 Total small game index 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 HEF EWT-EN EWT-LN Medium big game index 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 NHV NVD HEF EWT-EN EWT-LN -4 -6 Figure 7. Comparison of taphonomic markers for occupation intensity among the EN (2 different contexts) and LN samples, using Adjusted Residuals (AR). Positive AR values denote overrepresented traits, while negative AR values denote underrepresented traits. Significant values (AR 2) appear as black columns. indicate that gazelle body-size underwent significant changes during the Epipaleolithic (ANOVA F ¼ 5.31, p < 0.001). Tukey’s pairwise comparisons indicate that this difference derives mostly from the EN assemblage, which displays significantly larger measurements than the preceding Nahal Hadera V and Neve David gazelles (Fig. 10A; data from SOM Table A.8). The trend of larger gazelle body-size in the EN was attributed to increased proportion of males, but other potential explanations should be considered, such as cooler climate (e.g., Bergmann’s rule, see Davis, 1981) and human impact on gazelle populations, as suggested by Cope (1991) and later countered by Bar-Oz et al. (2004). If cooling was the reason for the increase in gazelle bodysize, other mammals should also follow this trend (Ducos and Horwitz, 1997). The only mammal available for comparison was the hare (humerus BT and scapula glenoid fossa BG measurements). Although the samples are small (SOM Table A.8.), the hare does not exhibit a parallel trend of body-size increase (EN versus preNatufian hares: ANOVA F ¼ 2.87, p ¼ 0.07 and F ¼ 0.07, p ¼ 0.959 for the humerus and scapula measurements, respectively) (Fig. 10B,C). Hence, the most plausible interpretation of the significantly larger-sized gazelles in the EN is change in sex ratios. Apparently males and females were culled in similar proportions along the coastal plain sequence, except for Early Natufian EWT. Slow small game index Fast small game index 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 NHV NVD HEF EWT-EN EWT-LN Figure 8. Index values for the Epipaleolithic sequence of the Israeli coastal plain (abbreviations as in Table 8). Black dashed lines separate the Natufian and pre-Natufian samples. In sum, during most of the Epipaleolithic hunters exploited a wide range of gazelle age classes in the Israeli coastal plain, with varying degrees of reliance on juveniles, and in most cases did not seek to capture a particular sex. The Early Natufian stands out in this series for its emphasis on male culling and its particularly low proportion of juveniles, albeit with a seemingly contradictory trend of taking fawns in relation to their natural abundance (Fig. 9). Discussion Similar site function through time The ancient function of excavated localities may affect paleoeconomic inferences. Feasting activities or ephemeral use of parts of large and complex sites may introduce serious biases when evaluating the long-term subsistence trends of Epipaleolithic R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 29 Table 8 NISP relative abundance indices used to measure intensification of animal resources during the Epipaleolithic and index values for the Epipaleolithic series of the coastal plain, following Stutz et al. (2009: their Table 4). Formula Total big game index Total small game index Large big game index Medium big game index Slow small game index Fast small game index NISPbg/(NISPbg þ NISPsg) NISPsg/(NISPbg þ NISPsg) NISPlbg/(NISPlbg þ NISPsbg) NISPmbg/(NISPmbg þ NISPsbg) NISPssg/(NISPssg þ NISPsbg) NISPfsg/(NISPfsg þ NISPsbg) KEB GKEB GKEB EN LN NHV NVD HEF EWT-EN EWT-LN 0.93 0.07 0.01 0.31 0.03 0.08 0.94 0.06 0.01 0.34 0.01 0.07 0.94 0.06 0.03 0.22 0.01 0.06 0.67 0.33 0.00 0.04 0.22 0.18 0.69 0.31 0.01 0.02 0.23 0.13 ‘Big game’ refers to ungulates: small, medium and large. ‘Small game’ refers to all other animals included in this study except squamates, divided to fast types (hare, small carnivores and respective size class, game birds such as partridge) and slow types (tortoise). Note that in Stutz et al. (2009) original indices small carnivores were excluded. Abbreviations: KEB, Kebaran Culture; GKEB, Geometric Kebaran Culture; EN, Early Natufian; LN, Late Natufian; NHV, Nahal Hadera V; NVD, Neve-David; HEF, Hefzibah 7e18; EWT, el-Wad Terrace. Table 9 Summary of gazelle age and sex data for the two assemblages in the present study (in bold type), augmented by data from the Epipaleolithic sequence of the coastal plain (Nahal Hadera V, Hefzibah 7e18 and Neve David, all taken from Bar-Oz, 2004). Proportion of juveniles (dental) Evenness of age classes Proportion of fawns (unfused phalanx I) Proportion of males (by body size) KEB GKEB GKEB EN LN NHV 39% 0.671 7.3% NVD 25% 0.683 8.5% HEF 24% 0.710 0.5% EWT 18% 0.712 13.0% EWT 50% 0.387 18.0% 81% 43% Under 50% Abbreviations are as in Table 8. households (Yeshurun et al., 2013a, submitted for publication; see also Asouti and Fuller, 2013). We applied taphonomic proxies of site-occupation intensity to investigate this issue and control for changing site type. Our intra-Natufian analysis within the key site of el-Wad Terrace compared domestic and non-domestic EN accumulations with the more enigmatic LN phase. Since the postdiscard damage patterns in the LN sample are intermediate between the domestic and non-domestic EN samples, we suggest that the difference between the two Natufian chronological phases was of degree, not of kind. The intensive post-discard damage from recurrent human activities and the considerable quantities of faunal remains that were found in the LN probably mean that EWT continued to serve as an important habitation site during the latter half of the Natufian. This conclusion is somewhat unexpected, Figure 9. Inter-phase comparison of gazelle culling patterns in the coastal plain Epipaleolithic: proportions of juveniles (<18 months old); proportion of fawns (<6 months old); and the evenness of age classes (e). The proportion of males, based on body-size considerations, is given for the sites in this study and approximated values (based on osteometrics) are given for the pre-Natufian sites (see discussion in Bar-Oz, 2004). The dashed line separates the pre-Natufian and Natufian samples. given the dissimilarities evident in the Natufian sequence of the site: the dramatic decrease in the thickness of habitation sediments, the disappearance of stone architecture, the dwindling of bone ornaments and the higher accumulation rates of naturallydeposited micromammals (Yeshurun, 2011; Weinstein-Evron et al., 2012; Weissbrod et al., 2012). This discrepancy may be explained when the entire Mt. Carmel settlement system is considered (see below). The general depositional similarity through time in EWT is reinforced when compared with several conspicuously different types of Natufian accumulations. The first example comes from the same site, the EN fauna from Chamber III of el-Wad Cave (EWC; Weinstein-Evron, 1998; see Fig. 1B for location). The EWC assemblage exhibits a medium big game index almost reaching preNatufian proportions and a very high fast small game index (Stutz et al., 2009), both very high compared with the EN terrace fauna. On the basis of the location of this excavation area in the dark part of the cave, the rarity of built features, lack of burials and composition of the lithic assemblage, it was suggested that it represented a specialized ‘dumping area’ and not a domestic or a burial locality (Weinstein-Evron, 1998). Supporting evidence for the nondomestic use of this locality may be found in the scanty evidence for in situ fire activity; the proportion of burned bone specimens is very low (4% of NISP; Rabinovich, 1998). These characters are reminiscent of the ‘occasional-toss area’ of Locus 25 in the EN terrace. Moving to the LN, Raqefet Cave (Mount Carmel, ca. 10 km east of el-Wad) that was used primarily for burial and other communal activities (Nadel et al., 2012, 2013) yielded a faunal assemblage weakly affected by post-discard damage (notably, low bone-burning intensity and frequency), as well as a relatively high value for the medium big game index, clustering with Locus 25 and the EWC samples in some attributes (Yeshurun et al., 2013a). Similarly, the LN fauna in the burial cave of Hilazon Tachtit (Galilee, Israel) yielded a low proportion of burned bones, almost identical to the EWC and Raqefet cases (Grosman and Munro, 2007; Munro and Grosman, 2010). These three non-domestic examples contrast with the intensively-trampled and unintentionally-burned EN and LN faunas in the current study. The LN fauna sampled here clusters better with LN habitation sites such as Hayonim Terrace (Munro, 2012) and ‘Eynan (Bridault et al., 2008), which also show extensive post-discard damage and, unlike Late Natufian EWT, preserve architectural features. By the same token, the pre-Natufian assemblages in the Israeli coastal plain Epipaleolithic series, namely, Nahal Hadera V, Hefzibah and Neve David, seem to represent spatially and vertically extensive amalgamations of human occupations attesting to various domestic (and other) activities and preserving ‘living floors’, a hut-like feature (in NHV), spatially defined concentrations of finds and diverse chipped lithics and groundstone assemblages 30 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Figure 10. Comparison of measurements among the coastal plain Epipaleolithic sites: (A) gazelle humerus BT; (B) hare humerus Bd; and (C) hare scapula-glenoid fossa (GLP). The Geometric Kebaran assemblages were pooled due to sample size limitations. See SOM Table A.8 for statistics. (Ronen et al., 1975; Saxon et al., 1978; Kaufman and Ronen, 1987; Kaufman, 1989, 1992; Barkai and Gopher, 2001; Bar-Oz, 2004; Bocquentin et al., 2011). The general similarity in the function of habitation through time in our case-study enables a more robust appreciation of Natufian economic trends, relatively independent of changes in site function. Economic intensification through time Economic trends in the Natufian sequence of EWT were put in a broader perspective, using the geographically distinctive Epipaleolithic series of the coastal plain (Bar-Oz, 2004) and a behavioral ecology approach (Stiner and Munro, 2002; Munro, 2004). The results attest to regional-scale intensification of game resource exploitation in the Natufian, relative to the pre-Natufian Epipaleolithic of the same region. Starting with the EN and lasting through the LN, ungulates dwindle in numbers and small animals comprise a much larger portion of Natufian prey. The ungulates that were still routinely captured were overwhelmingly small ungulates (i.e., gazelles) as opposed to a significant input of larger ungulates (i.e., fallow deer) in the preceding Epipaleolithic samples. No difference was observed in the EN versus LN phases of EWT in these respects. On the more local (site) scale, fast small game is somewhat more abundant in the EN phase, possibly signaling stronger human prey pressure in the camp’s catchment area (Stiner et al., 1999, 2000; Munro, 2004). The observed prey trends were previously identified in the coastal plain sequence (Bar-Oz, 2004) as well as in the KinneretGolan region (Davis et al., 1988; Davis, 2005), the Wadi Meged series in the lower Galilee (Munro, 2004; Stiner, 2005) and the Damascus Basin (Napierala, 2011). However, only the Wadi Meged series had previously included EN samples in the analysis, yielding significant differences in small game procurement between the EN and LN (Munro, 2004). Other inter-regional syntheses (Munro, 2009; Stutz et al., 2009) argued for a gradual decline of medium and large big game and an increase of small game species over time, between the Early Epipaleolithic and the EN and LN of the Mediterranean zone. While the present results generally support these assertions, it is important to note that no ‘gradual’ trend is apparent. Rather, the shift in ungulate proportions relative to small game, and the near-disappearance of medium and large ungulates, occur abruptly in the EN and remain largely unchanged in the LN. Additionally, small game indices (fast versus slow) display the same marked ‘step’ in the pre-Natufian e EN transition, exhibiting negligible index values in the Kebaran and Geometric Kebaran samples as opposed to high values in either the EN or LN. The striking difference between the pre-Natufian and Natufian assemblages overshadows any minor variations within these two time- periods, including the modest decline in fast small game abundance in the LN. The importance of small animals in human diet during the late Epipaleolithic reaffirms the true broad spectrum nature of Natufian animal economy. Such common exploitation of tortoises, hares, foxes and possibly squamates, which comprise around 50% of the identified specimens, along with mole-rats, Mediterranean fish and edible mollusks (Yeshurun et al., 2009; Bar-Yosef Mayer and Zohar, 2010; Weissbrod et al., 2012) was rarely observed in the preNatufian Epipaleolithic and Upper Paleolithic record of northern Israel (e.g., Rabinovich, 2003; Bar-Oz, 2004; Stiner, 2005; Marom and Bar-Oz, 2008), let alone the more arid areas of the southern Levant (e.g., Martin et al., 2010). The lakeside settlement of Ohalo II is currently the only example of pre-Natufian fishing (of freshwater fish) and one of the rare cases of fowling (Simmons and Nadel, 1998; Zohar, 2003). However, pre-Natufian sites that are not located in a lacustrine setting have not yielded any significant evidence of fishing, in contrast with the presence of Mediterranean fish in several Natufian inland sites (Davis et al., 1994; Bar-Yosef Mayer and Zohar, 2010). Importantly, four families of Mediterranean fishes were identified at EWT (Valla et al., 1986), even though the site was 8e12 km away from the sea shore. Birds are sporadically present in the pre-Natufian Epipaleolithic, but can usually be considered to reflect specialized exploitation for raw materials, not regular and long-term dietary contributions (Martin et al., 2013). The extremely broad spectrum animal diet of the Natufian lends strong support to the view of Natufian economy as being intensified. Natufian foragers chose to hunt significant amounts of lowerranked game, probably in response to population packing in a defined territory (Munro, 2004). Taking a long-term perspective beyond the Epipaleolithic, ungulates had been the main target of hunting in the Levant since the Middle Pleistocene and Natufianlike exploitation of many small game taxa was very uncommon up until this stage (Stiner, 2005; Yeshurun, 2013). Plant exploitation must have played a very important role in Epipaleolithic subsistence, and intensified plant exploitation is commonly mentioned as an Epipaleolithic hallmark. While sporadic charcoal, pollen and phytolith data exist in the Natufian (LevYadun and Weisntein-Evron, 1994; Weinstein-Evron, 1998; Portillo et al., 2010; Rosen, 2010; Power et al., 2014) macrobotanical evidence from the southern Levant Epipaleolithic is so scarce (Asouti and Fuller, 2012: their Table 2) that quantitative analyses cannot realistically be performed. Therefore, until new archaeobotanical data sets are available, the BSR must be measured by animal exploitation alone in this period. Results from gazelle culling patterns augment the economic ‘break’ seen between the EN and its forerunners. The probable targeting of males during the EN is unique in the Epipaleolithic R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 series of the coastal plain, paralleling other Natufian assemblages (including LN ones; Garrard, 1980; Cope, 1991; Bar-Oz et al., 2004). It was suggested that targeting males was a (possibly seasonal) adaptation to ecologically sustainable hunting, attempting to minimize the effects of human predation on the non-migratory mountain gazelle herds in a territory (Cope, 1991). The pre-Natufian assemblages exhibit age distributions that are similar to the year-round average of modern herds and cannot point to exploitation of specific age groups. An exception is the avoidance of fawns, presumably due to small meat and fat returns (Munro and Bar-Oz, 2005). The picture changes in the Early Natufian, where adult male gazelles were targeted, and fawns were taken in proportions similar to their natural abundance, in line with the BSR hypothesis. The evenness of age groups in both the earlier Epipaleolithic and the EN is moderately high. It is possible that the age group evenness index reflects two different mechanisms in the pre-Natufian and EN assemblages, namely, culling of both young and older gazelles in the former and averaging of exceedingly numerous occupations in the latter, when gazelles were deposited during several seasons (Davis, 1983). Such a scenario may explain the seemingly contradictory evidence of adult-focused culling in conjunction with hunting some fawns in the EN. The picture changes again in the LN, demonstrating an unselective culling of sexes, juveniles and fawns. The low evenness of age groups here may stem from the small sample in comparison to the other assemblages and therefore enlarged samples will be needed to verify the LN culling evenness trend. Age profiles generally present a complex and inconsistent picture throughout the Natufian assemblages. The proportion of gazelle fawns in the EN period ranges between 4 and 40%, with older sub-adult proportions very variable (Munro, 2009; Edwards and Martin, 2013). High juvenile proportions of 30e50% characterize several, but not all, LN assemblages (Davis, 1983, 2005; Munro, 2012; Yeshurun et al., 2013a). Hence, ambiguous patterns are evident in the issue of Natufian gazelle culling, which, although one of the most researched topics in Natufian archaeology, it is one of the least understood. Better interpretative frameworks are especially needed if we are to understand the Natufian preferences for gazelles of certain age classes. Decreasing mobility and increasing catchment exploitation The importance of the Natufian economic transformation lies in its implications for inferring terminal Pleistocene mobility patterns. Small animal exploitation has been seen as an important marker of prolonged site occupation and population growth in the Natufian, because of the need to feed a growing or more permanent population in a given territory (Tchernov, 1993b; Stiner and Munro, 2002; Munro, 2004, 2009; Weissbrod et al., 2012). Thus, the broad-spectrum economy and the increased culling of immature gazelles were interpreted as a certain facet of the EN sedentarization phenomenon, which has also been inferred from multiple archaeological proxies. The notion of EN sedentism is strongly supported by our findings, as the fauna presented here comes from a major hamlet, where stone architecture is plentiful and the density and diversity of finds are very high (Weinstein-Evron et al., 2013). Both the intensified animal economy and the archaeological nature of the site contrast sharply with the pre-Natufian Epipaleolithic evidence from the same region (Bar-Oz, 2004). Thus, keeping the site function, site catchment and analytical methods as constant as possible convincingly demonstrated the economic intensification marking the emergence of sedentary life in the EN, ca. 15e14 ka in the Israeli coastal plain. In conjunction with decreasing mobility, one of the hallmarks of the Natufian economy, the regular capture of small mammals, may 31 reflect intensified site catchment exploitation in this period. While gazelle hunting was probably performed by shooting with microlith-tipped projectiles (Yeshurun and Yaroshevich, 2014), albeit with increasingly efficient designs (Yaroshevich et al., 2010), the regular hunting of small and agile terrestrial animals, primarily hares and foxes, which are solitary and nocturnal, was likely performed by traps and snares (e.g., Winterhalder, 1980; Holliday and Churchill, 2006). Modern studies on poaching of Israeli wildlife showed that most trapping methods, such as simple cable snaring, would indiscriminately capture a broad spectrum of small and medium mammal species (Yom-Tov, 2003). Thus, snaring would have constituted an efficient and predictable hunting method for the systematic execution of the broad-spectrum animal economy in a defined Natufian territory. Setting, maintaining and keeping track of a system of traps and snares requires a long presence of humans in a given territory and excellent acquaintance with the landscape, the animals and their local patterns of foraging, and thus may be related in the ethnographic record to sedentary or semi-sedentary societies (Holliday, 1998; Holliday and Churchill, 2006). The inferred patterns of LN sedentism and site-catchment exploitation do not differ much from EN patterns in this study. The LN period in the Mediterranean southern Levant was sometimes viewed as one of cultural decline and a return to a more mobile way of life, compared with the Early Natufian (Garrod, 1957; Henry, 1991; Valla, 1995; Belfer-Cohen and Bar-Yosef, 2000; BarYosef and Belfer-Cohen, 2002; Grosman, 2003; Munro, 2004). This was mainly due to the more impoverished and thinner nature of LN layers in the intensively-researched sites of el-Wad, Hayonim Cave and ‘Eynan, where architecture, elaborate burials and art objects were considered to be less frequent. However, it has become increasingly clear that stone-built dwellings and other architectural features are common at some Late/Final Natufian sites, as apparent from the new fieldwork at ‘Eynan (Valla et al., 2007), Huzuk Musa (Rosenberg et al., 2010) and Nahal Ein Gev II (L. Grosman, Personal communication), as well as other sites in the more arid regions (Henry, 1976; Goring-Morris, 1991; Conard et al., 2013; Richter et al., 2013). Elaborate LN funerary customs are now known in Hayonim Terrace (Tchernov and Valla, 1997), Hilazon Tachtit Cave (Grosman et al., 2008; Munro and Grosman, 2010) and Raqefet Cave (Nadel et al., 2012, 2013; Yeshurun et al., 2013a). While at EWT the nature of the LN layer is indeed impoverished compared with the EN, it was taphonomically demonstrated here that the site was still used for diverse domestic activities (as well as for burial, which is spatially and perhaps temporally segregated from the habitation sediments; Weinstein-Evron, 2009) and was intensively and recurrently inhabited. While the taphonomic markers of siteoccupation intensity indicate that the LN habitation were somewhat less intensive compared with the EN, the economic indicators pertaining to site-occupation intensity do not differ much from the EN phase, especially when the pre-Natufian sites are used as reference. Furthermore, just 5 km north of el-Wad there existed a major LN base-camp at the site of Nahal Oren, displaying an architectural compound (a terrace wall and associated living surfaces), as well as a spatially distinct cemetery (Stekelis and Yizraely, 1963; Noy, 1991) and evidence of occupations throughout all of the LN sub-phases (Grosman et al., 2005), much like EN el-Wad. Thus, the major base-camp of the Carmel Coast may have simply shifted from EN el-Wad to LN Nahal Oren, hardly suggesting any loss of mobility or cultural complexity in the Mediterranean Levant (Weinstein-Evron, 2009). The presence of both base-camps and specialized sites may suggest stable (or even growing) LN populations in the Mount Carmel-Galilee region ca. 13.7e11.7 ka, corresponding with the evidence for geographic expansion of settlements and the emergence of novel technological and social adaptations in the latter half of the Natufian (e.g., Bar-Yosef, 2002; 32 R. Yeshurun et al. / Journal of Human Evolution 70 (2014) 16e35 Valla et al., 2007; Grosman et al., 2008; Stutz et al., 2009; Weinstein-Evron, 2009; Rosen, 2010; Valla, 2012; Nadel et al., 2013). Conclusions We evaluated terminal Pleistocene subsistence change in the Levantine Epipaleolithic, when mobile foragers were settling down in the course of the earliest foraging-to-farming transition. Archaeologically, the salient features of the late Epipaleolithic Natufian Culture at key sites such as el-Wad (the regular appearance of stone architecture, cemeteries, groundstone and art) stand out, suggesting remarkable socioeconomic changes. Early Natufian el-Wad Terrace yielded novel paleoeconomic signals compared with the pre-Natufian Epipaleolithic of the same region, accompanied by the preponderance of stone-constructed dwellings, high density of finds, and heavy taphonomic damage from repeated and intensive occupations. The Late Natufian sample differs in gazelle culling patterns but nonetheless represents enduring economic intensification, coupled with relatively reduced, but still considerable post-discard taphonomic damage from repeated occupations. The LN occupations may have been somewhat less intensive than the EN occupations in the particular case of el-Wad, but still left behind habitation deposits of an important hamlet. The use of contextual taphonomy, focusing on post-discard damage in Epipaleolithic camps, carries a somewhat unexplored potential and should be implemented in forthcoming studies to distinguish degrees in the intensity of accumulation and repetition of habitations. It is evident from the Epipaleolithic series of the Israeli coastal plain that the Early Natufian constituted an economic break, reflecting decreasing mobility and increasing exploitation of the site catchment. While the roots of the Early Natufian can surely be traced back to the preceding cultures, the economic and social transformation it reflects should not be underestimated. Concurrently, the EN-LN differences should not be overemphasized. The Natufian economic transformation may be mentioned as a genuine stage in the evolution of human diet in the latest Pleistocene Levant, characterized by obtaining a broader spectrum of animal resources and reflecting the rise of sedentism in this period. The Natufian strategy, commencing in the EN and maintained in the LN, was successfully employed for several millennia until it was gradually replaced by food production during the Pre-Pottery Neolithic Period. Acknowledgments This paper is based on R.Y.’s doctoral research at the University of Haifa, generously funded by the Graduate Studies Authority, the Hecht Scholarship, the Wolf Foundation Scholarship and the Carmel Research Center Grant. The manuscript was written during his Fulbright post-doctoral fellowship in the Smithsonian Institution. We thank D. Kaufman for his help throughout this research and for commenting on a previous draft and A. Regev for graphic assistance. The paper greatly benefitted from the helpful comments and suggestions by the editors and two anonymous reviewers. The renewed excavation at el-Wad Terrace is sponsored by the Wenner-Gren Foundation, the Care Foundation and the Faculty of Humanities, University of Haifa. Thanks are also due to the Dan David Foundation and to Sarah and Avie Arenson for their support. Appendix A. Supplementary data Supplementary data related to this article can be found at http:// dx.doi.org/10.1016/j.jhevol.2014.02.011. References Amitai, P., Bouskila, A., 2003. Handbook of Amphibians and Reptiles in Israel. Keter, Jerusalem (Hebrew). Asouti, E., Fuller, D.Q., 2012. 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