Odatria_1_OCT08 - Victorian Herpetological Society
Transcription
Odatria_1_OCT08 - Victorian Herpetological Society
Odatria Newsletter of the Victorian Herpetological Society No. 1, October 2008 Contents 2008 VHS Committee: President: Kevin Welsh Secretary: Andrew Owen Treasurer: Phil Elliott Exec. Comm. Member: Peter Comber Exec. Comm. Member: Michael Alexander Welcome to Odatria 2 Adventures in the Land Down Under by Greg Maxwell 3 Odatria Editors/Producers Andrew Owen Kevin Welsh “Odatria” is published by The Victorian Herpetological Society Inc, Copyright 2004 all rights reserved. Apart from any fair dealing, as permitted under the Copyright Act, no part may be reproduced or stored by any process without written permission. Enquiries should be directed to VHS committee. Beginners Guide to Keeping... Pythons by Andrew Owen 6 Any views or opinions are entirely those of the relevant author and do not necessarily represent the views of the Victorian Herpetological Society Inc. Meeting Review Alan Henderson Sept 5th, 2008 8 Correspondence: PO Box 4208, RINGWOOD VIC 3134 [email protected] Puzzle Pages 10 www.vhs.com.au Photo credits with photos. Uncredited photos are from VHS archives. Photos published are the property of both the Victorian Herpetological Society Inc. and the respective authors. Subject to full copyright and all rights are reserved. WPTAC by Peter Comber 12 Any articles should be sent to the editor in electronic form and/or in printed paper format. All articles are refereed by person/s in the respective field. Photos, slides and diagrams are encouraged as all can be used and should be sent via registered post or email. Taxonomy usually follows Wilson & Swan, 2003 but authors can cite other references if used. The VHS editorial staff have the right to refuse publishing any articles that are deemed unsuitable, offensive or controversial. Children and the Scaley Ones by Kerrie Alexander 14 Classic Article Keeping and Breeding the Coastal Taipan by Brian Barnett 16 The VHS would like to thank the following individuals for their help & support: Cover Photograph: Pygmy Mulga Monitor Varanus gilleni by Damian Goodall, Eye for Nature Brian Barnett, Lani Barnett, Daavid Turnbull, Judy Turnbull, Jennifer Lewin, Rachael Hammond, Victoria Sullivan, Mark Borg, Luke Ludwell, Marrianne Beatty, Melissa Carstens, Kerrie Alexander, Robyn Welsh, Simon Watharow a i r t a d O Welcome In this edition you will notice the first of a couple of regular features we have planned for Odatria. Welcome to the first edition of Odatria! It has been an interesting and enjoyable experience putting together this first edition for our members, we hope it lives up to your standards. “Classic Articles” is a feature in which we will revisit an article from the past. With so many issues of Monitor having been successful and many no longer available to purchase, why not have a second look at the classics? We will also endeavour to get an update from each author on the species featured. So if there is an article you’ve heard of, or just a particular animal you would like to see covered, please request it! So firstly, what is Odatria? Well after giving our printed publication, Monitor, an indefinite rest, suggestions were put forward for some sort of a ‘mini-monitor’ in place of regular Monitor, so what better name for our electronic newsletter? The name Odatria is widely recognised as a sub-genus (sometimes genus) of monitors (Varanus). The name covers all of the Australian goannas usually regarded as the ‘pygmy monitors’, e.g. Spiny-tailed (acanthurus), Storr’s (storri), Pygmy Mulga (gilleni) etc. (except the Canopy Goanna, keithhornei). The name was first used by John Edward Gray in 1838 in his description of our Black-headed Monitor, currently Varanus (Odatria) tristis tristis, but described at the time as Odatria punctata. Most scientific names are Greek or Latin in origin and usually refer to a particular characteristic of the genus or species. The name Odatria, however, appears to be simply made up by Gray, he had a penchant for names that sounded nice and is known to be responsible for others, like Delma, Carlia, Tiliqua and Egernia to name a few. “A Beginner’s Guide to …” is exactly that. Care sheets are something people often ask for and our society sees the need to lead the way in providing advice for new herp keepers. We had several requests for care sheets at the 2008 Expo, and with the recent update of the VHS website we noticed a lack of good, basic information. We will add the Beginner’s Guide articles to the website as they are completed and endeavour to print off copies to have at future meetings and expos. I hope this first article gives some of our members the confidence to help out and write a Beginner’s Guide, it would be much appreciated by the committee and, more importantly, the beginners out there! Our plan is to cover the most common reptile and amphibian groups (e.g. monitors, frogs, turtles), then the more common species in those groups (e.g. Spiny-tailed Monitors, Green Tree Frogs, Long-necked Turtles). We hope that the more relaxed feel to our newsletter is welcomed by you, our members, and gives more people the confidence to submit articles to strengthen the quality of Odatria. The VHS plans to continue to publish Odatria on a regular basis and value all VHS members contributions and feedback. Adventures in the Land Down Under by Greg Maxwell On Saturday the 23rd we headed to the showgrounds and the expo, after getting a behind-the-scenes tour of the reptile house at the Melbourne Zoo that morning. We had stopped by the showgrounds the day before to check on the setup which was underway, but now the place was full of people and the air was buzzing with excitement. In a way, it was very nostalgic for me. The atmosphere, the types of reptiles and the displays, all took me back in time to the first large reptile show that I attended. It was 1993 and I was operating a reptile cage manufacturing company called CageMaster. We did monthly small shows in several locations, but in 1993 we branched out nationally. In May of that year I went to the first of many large expos around the US. This one was in Hamburg, Pennsylvania, held in a large field house intended for sporting events. My mate Phil Black lived nearby and went with me, and to this day we recall the absolute buzz in the air! Captive breeding of reptiles was peaking at this time in the States and the air was electric with anticipation. By the end of the day we had sold a truck load full of cages, made a lot of money, spent a lot of money, and were filled with enthusiasm about what lay ahead for both the cage and the captive breeding markets. In February of 2008 I had the privilege of traveling to Australia to spend a week as a guest of the Victorian Herpetological Society. I was honored to be one of the speakers at the Societies meeting, and I also attended the Herp Expo held the day prior to the annual meeting at the Agricultural Hall, Melbourne Showgrounds. My time in Australia included meeting up with friends in Sydney and making new ones in Melbourne and Cairns. I was greeted at the airport by Judy Turnbull, webmaster of The Herp Trader, and her husband Daavid. I could not have asked for better hosts, and their enthusiasm for meeting me was matched by my own pleasure at making such good friends right off the bat. I was to learn that this is the norm for Aussies. Everyone whom I met was wonderful and gracious. After a Thai lunch we met up with a few colleagues at the Vibe Hotel, our headquarters for the next couple of days. I was jet lagged after the 15 hour flight from LA, but I was determined to stay awake and not miss any of the fun. That afternoon we visited the Aquarium and Reptile Centre, a pet store with many nice displays that were much nicer than the average pet store in the States. I was given a very cool clock made from a CD disk with a photo of a Diamond Python on it. This gift now sits on my desk and is a cool reminder of my first day in Oz. My traveling companions to Sydney were my good friend Simon Treseder, and his mate Ross Hillyard, both residents of Sydney. I had met Simon a couple of years previously and had enjoyed hosting him at my place for a few days in October of 2006, and now he was returning the favour. I could not have asked for better companions than Simon and Ross, both of whom had flown down to Melbourne to meet me and to attend the expo and talks. I spent a very enjoyable couple of days with these two, seeing the sights of Sydney and having dinner at the top of the Sydney Tower Restaurant on Monday evening. On Sunday we made our way to Monash University where the talks were to be given. First up was Australian herpetologist Steve Wilson, whose talk about the herps of Cape York was fascinating and well-documented with wonderful photos. I was introduced after Mr. Wilson’s talk and gave the first of two presentations about my work with Green Tree Pythons. The first talk focused on husbandry; the second illustrated the various selectively bred colour morphs that we are developing in America. I answered some questions from the audience following the talks, signed some books, and then we had some quick slices of pizza before being whisked off to catch a plane to Sydney. Brian Barnett showed us some fancy driving to get us there in tim Brian had arranged for me to spend time with German herpetologist Peter Krauss, who lives in Cairns and who came to Australia to work as a zoo keeper in the 1950’s. Simon dropped me off at the airport on Tuesday evening, and a large storm closed the entire airport for about an hour and delayed all the flights. While waiting, a very nice Australian girl sitting next to me struck up a conversation and asked about the nature of my travels. As I explained my purpose and destinations, she made fun of my American pronunciation of “Mel-born” and we had a good laugh. Finally the storms cleared and my flight to Cairns took off. Peter Krauss met me at the Cairns airport and we drove through the night in pouring rain. I was soon to gain firsthand knowledge about the rainy season that I had read about for years. The first day at Peter’s, it never stopped raining, and when I say rain, I mean hard rain! At home we would have had huge evacuations from such heavy rainfall, but of course Cairns has evolved with this amount of water falling. We did not allow the dampness to affect our mood, and I enjoyed a wonderful two days with Peter, his wonderful wife Milli, and several friends who came by to visit. We did some road cruising at night and animal life was plentiful, brought out in abundance by the heavy rains. We saw several kinds of snakes, common to Peter but amazing to my American eyes. Best of all was the gorgeous blue tree snake that we observed on a back road on Thursday and photographed. The hospitality of the Krauss’s and the wonder meals will last in my memories for a lifetime. Peter’s outdoor monitor pits are most impressive, as are all of his herps. A couple of weeks after my return home, a beautiful gift arrived from the Herp Society- they had known of my love of opals and had sent me a wonderful watch as a thank you gift. I wear it all the time, and you can be sure that each time I look at it, I remember the words of Mr. Wilson during his talk: “In Australia, there are two kinds of herpetologists, those who have seen a wild green on the Cape and those who have not.” I would add that in America, we have two kinds of herpetologists; those who have been to Australia and those who have not. Due to the generosity of the Victoria Herpetological Society and all those who helped to bring me down under, I can proudly say that I am one of those fortunate Americans who has been to the Land of Oz. Due to the heavy rains threatening to close the main road back to the airport, we decided to head to town on Thursday night and stay at a hotel. My flight back home left the Cairns airport early in the morning. I headed home with my head full of the memories of this wonderful country Australia, all the friends I had met and made, and the rich diversity of Australian wildlife I had seen. A Beginner’s Guide to ... Pythons By Andrew Owen Pythons are increasing in popularity as pets in Australia and many species are now available. Keeping native species as pets is a good option ecologically and if the animals’ basic needs are met they can thrive in captivity. Housing Pythons should be kept individually in a secure enclosure made from thermally efficient material (material that holds heat well like wood or plastic, not a glass fishtank). A glass front allows for viewing your animal. The diagram below illustrates a basic python set up and minimal requirements for a healthy animal. Housing hatchling/juvenile pythons If you purchase a hatchling/juvenile python keep it in a “click-clack” (small, secure container) inside your enclosure until it is an appropriate size for the enclosure this could be up to a year. Too many people get impatient and put their small python in an enclosure too early, only to have the animal escape through gaps around glass & vents, etc! Guide to enclosure size Arboreal python Terrestrial python (tree dwelling) (ground dwelling) Length Width Height ¾ of snake length Length of snake ½ of snake length ¾ of snake length Length of snake ½ of snake length Substrate Shedding (Sloughing) Choice of substrate (the material on the bottom of your enclosure) varies. Small gravel can look nice, but cleaning time is increased. Newspaper is hygienically and practically best but not as visually pleasing. Feeding Before purchasing your python make sure it has been feeding on thawed mice or rats. You may think it is boring feeding your pet the same meal but a mouse or rat has all the nutrients needed. If a python is happily feeding don’t change things. Pythons shed their skin every couple of months or so, more frequently as they are growing. A sign of a healthy python in a good environment is its shed. A good, whole skin shed signals correct humidity and health. If a shed comes off in patches perhaps more cage furnishing with rough sections are required and more humidity. Greater humidity can be achieved by increasing the size of the water bowl or occasional light spraying of the enclosure with water. Any retained shed, in particular on the eyes and tail tip, must be removed. Handling Juveniles should be fed every 7-10 days, slowly increasing the size of the meal as your python grows. Adults should be fed a meal around 20% of their body weight every 2nd week (possibly more in summer and less or no food in winter). Pythons are predominantly nocturnal so feeding after dark is best. If your python refuses a feed, don’t be alarmed. Some don’t eat when they are about to shed and some will go off food in winter. When a new animal is purchased, introduce it to its new home and leave it alone until it is feeding and comfortable in its surroundings. If your snake is about to shed (signaled by milky eyes) leave it alone until shedding is complete. The snake’s eye sight is poor at this time and handling is stressful. After a feed leave your python alone to digest its meal and if you usually feed your python at night it is advisable not to handle it at night. Drinking Water Drinking water should be available at all times to your Python. Refrain from simply topping up the water bowl as much as possible. A couple of times a week, remove the water bowl, empty & clean the bowl thouroughly, then re-fill with fresh water. VHS MEETING REVIEW SEPTEMBER 5th, 2008 ALAN HENDERSON Then it was time for Part 1 of Alan’s talk: Feeding the Devil, during which he shared many fascinating facts and stories about the Thorny Devil, accompanied by brilliant photography. Alan has been lucky enough to work with these animals at Melbourne Museum and his expert knowledge of invertebrates prepared him well for keeping an animal that requires on average 1485 ants per day! Setting up and maintaining the ant colony requires as much, if not more, effort and knowledge than keeping the devils. The Melbourne Museum has an ant colony housed in an old termite mound which is on display in a separate enclosure to the lizards. To create ant trails, sweet food is placed in various locations outside the mound. Several times a day visitors can observe the devils eating as they are introduced to the ant enclosure and placed along an existing trail to feed. We headed back to Monash University for the third Victorian Herpetological Society meeting of 2008. The meeting started off with the usual VHS auction, with several herpers out for a bargain! Some of the more sought after items were a Thick-tailed Gecko (donated by Mike Alexander of Black Snake Productions), a 12 month subscription to the new herp magazine Scales & Tails (donated by Scales & Tails), Repta Pet heat mats & globes (donated by Mimmo from Repta Pet) and several cartons of quality crickets (donated by Frank), with 400 crickets in each carton going for just $10, they were snapped up!!! Thanks to everyone who donated items for the auction, much appreciated. Thanks also to our newest member, young Jordan whose eagerness to bid was much appreciated by all (well, perhaps not so much his dad!), congratulations & all the best with your new gecko. Another highlight included a description and live demonstration of how the devils drink. They are able to stand in shallow water and the water is drawn up via capillary action to channels which run all over their bodies. These channels direct water to the corners of the mouth and the devil simply opens its mouth slightly to drink. Many more great photos showed the audience the vast range of invertebrates both on show at the Museum and available to keep as pets. We can only see the hobby of keeping invertebrates growing as new species are found and knowledge of their husbandry requirements improves. After a quick break in which we got to get up close and personal with a live Thorny Devil, Alan began his second talk: Keeping Bugs Alive. Although an unusual topic for a VHS meeting, the talk proved to be very interesting. A photo of an, as yet, undescribed species of huntsman spider from far-north Queensland had the audience intrigued early. This animal had orange, yellow and brown patterns covering its body, Alan hopes to name this species the Tiger Huntsman. Another interesting photo showed a black and white striped morph of the spiny leaf insect. As usual the night ended with socialising over pizza. Hope to see you all at the next meeting! PUZZLE PAGES Brought to you by Jen Lewin & Andrew Owen S u m z s d h r r q k e s t m s c y y r w e o z x u z l w o f x a a b p a a l g a k o q k r a z l t l t l n x n b u e c h i n i e a a o c z n h g k e l d l g i s t c t e a u h e g o e l p j d f t k y o y t e u c t a t e p r a c h g y p l r h n r k v e n o m i e y o b e d g r e k s i t j n d a d a h d o p w s p y t h o n k d c i f c u q u e e n s l a n d k s f q r k u c d b e l t r u t s i c j g e o a g l c m r x r b BLACKHEAD LIZARD CARPET PYTHON CLAWS QUEENSLAND DESERT REPTILE FANG SCALES FORKEDTONGUE SLOUGH GECKO SNAKE GOANNA TAIPAN HISS TURTLE KEELBACK VENOM 10 Across 3. 6. 7. 8. 10. 11. 12. 13. 15. 18. 20. 21. 22. 23. 24. 26. 28. 29. 30. Most northern location of Australian Green Pythons Male reproductive organ in reptiles Boyd’s Rainforest Dragon, Hypsilurus ............ Popular Woma locality Smallest Australian Python A form of Spotted Python Australia’s largest long-necked turtle species, ..........-shelled Turtle ‘Two headed’ lizard, ............-tailed Lizard Tree Frog genus Snow white animal with no pattern Popular Death Adder locality Introduced toad species Ant eating lizard Snake Ranch’s Salt & Pepper are what type of Blue-tongued Lizards ....... legless lizard Old Green Python name Longest monitor found in Australia Most recently described Python (Smith,1981) A form of Lace Monitor Down 1. 2. 4. 5. 9. 14. 16. 17. 19. 25. 27. 11 Surname of the first person to breed the Rough-Scaled Python The ‘Barefoot Bushman’ ............. Monitor, Varanus acanthurus Describes a female undergoing egg development Inland Carpet Python, Morelia spilota ............ Aspidites ................... This animal has the most toxic venom of any known land snake Most endangered Australian frog Green Python guru Brown Tree Snake or ........... Tiger ...........-tailed Gecko Wildlife Possession and Trade Advisory Committee WPTAC The ‘Wildlife Possession and Trade Advisory Committee’ is a body put together in the mid 1980’s in an attempt to provide ‘expert’ advice to the licensing division and policy makers of the (then) Department of Conservation Forests and Lands. Now known as the WaGLS (Wildlife and Game Licencing Service) of the DSE, (Department of Sustainability and Environment). This committee is made up of representatives from DSE, the Bureau of Animal Welfare, Zoos Victoria, PIJAC (Pet Industry Joint Advisory Council), wildlife demonstrators and displayers, the Trappers Association of Victoria, the Australian Taxidermists Association, the Victorian Avicultural Council, the Marsupial Society of Victoria and of course the Victorian Herpetological Society. The committee meets every three months. The first VHS representative was the (then) President, Brian Barnett. Peter Comber replaced Brian in about 1993 and was followed by Steven Comber, Simon Watharow (President) Doug Wintle, Meynies Bornman (President), Phil Elliott, Kevin Welsh (President) and currently back to Peter Comber, executive committee member. The following excerpt is taken from the “Function, Terms of Reference, Operation and Procedures” document relating to WPTAC. “The primary function of members is to offer sound advice to the Department based on collective experience and knowledge, and not to represent exclusively any particular group. However a knowledge of the business of an interest group may be sought from members by the committee to assist in its deliberations”. Take note: the VHS representative is not exclusively representing/speaking on behalf of only VHS members but the Victorian reptile keeping community as a whole. Likewise for the other committee members and their particular fields. The WPTAC discusses all aspects of wildlife matters relating to the current regulations and the act under which they are delivered (Wildlife Act 1975). Unfortunately a prevailing view point that seems to be held by many is that the WPTAC is exists only to “..get new stuff on the schedules.” A small part of the WPTAC certainly does involve the receiving, reviewing, evaluating and follow up recommendations for submissions to add new species to, or move around existing species in, the various scheduled listings of wildlife in Victoria. It is certainly recognised that the main interest held by my most private reptile keepers is in this regard. Currently a number of submissions are ‘in hand’; of a recent 49 submissions that were received by WaGLS (birds, mammals, reptiles and amphibians combined), the WPTAC has evaluated and supported 38 (individual member reviews), an upcoming meeting has been calendared to discuss the remaining 11 and provide further information if required. Once a submission has been supported by the WPTAC it still needs to be approved and acted upon by DSE and then (currently, at least) passed through parliament. Pygmy Python Antaresia perthensis hatchling 12 Further updates on WPTAC recommendations and DSE decisions will be provided in upcoming issues of Odatria. Further items discussed/notifications provided are as follows: - New payment/renewal notices are being used for licence renewals, facilitating the renewal process with payment options available via the phone, post and internet. Payment in person is no longer possible. - Notice was given in respect to the future utilisation of the Licence Referencing Committee (LRC), a body made up of senior management staff from various branches of DSE (inc. licencing, policy, enforcement, wildlife management). The LRC has been around for some time but in the past has only had new applications (for licences) referred to it. It is basically a review body that is consulted if refusal of an application is a possibility. Final decision always rests with the Secretary (or appointed delegate thereof). The LRC is now expected to be consulted in respect to major breaches and/or convictions involving wildlife, in the past licence cancellations and non-renewals have usually been left up to the courts. Repeat offenders who do not furnish returns may be referred to the LRC, DSE wishes to remind that the keeping native wildlife is a privilege not a right, this privilege can be refused/ removed. Any action to be taken as a result of the LRC recommendations will result in the person being notified in writing with the right of reply. Woma Aspidites ramsayi - One agenda item covered the use/application of microchips in wildlife. The technical wording of the act is written in such a way that it does make it an offence to mark wildlife (microchips and bird legbands included). The act, written in 1975, could not foresee today’s current situation and DSE agrees that the spirit of the act was/is not such that it intends to make these acts an offence. As such, if a veterinarian applies the microchips, no action will be taken against people holding wildlife marked in said manner. All microchips need to be of the nationally recognised standard (i.e. Trovan or Destron). - All positions/chairs in the WPTAC are up for reappointment (every three years). The current reptile keepers representative, Peter Comber, is up for reappointment and any other persons interested need to make their intentions known by 13 November, 2008, in writing to: [email protected]. Further information will be provided to interested parties. Pygmy Python Antaresia perthensis - DSE WAGLS is currently awaiting legal advice in respect to interpretation of parts of the act regarding the regulatory review process, the outcome of this hopefully being that Regulatory Impact Statements will not need to be made, therefore streamlining the whole process for changes to the regulations (and significantly reducing the time factor). Rough-scaled Python Morelia carinata Peter Comber 13 Children and the Scaley Ones by Kerrie Alexander Kids & reptiles! Can they mix and should they mix? Examples of rules for children when handling reptiles are as follows: In my opinion yes and sometimes no. In this article I will express some ideas and tips on how to keep the harmony with our pets and children and also perhaps when we should draw the line. * Only touch the back, tail or tummy, as they do not like to be touched on the face. (If asked why? we simply ask if they liked being touched all over the face by a stranger, no is usually the answer.) Facing the animal with its tail towards people is the best way to solve this. In my experience with demonstrating reptiles to children I have found 80% are keen to touch and are waiting with lots of questions. This is, of course a fantastic learning experience, but like most things children need some guidance. They need to be shown how to treat and hold the animals in order to understand how these little creatures work. * Make sure you support the animals’ legs when holding and do not squeeze, just let them sit or slide through your hands. Usually the children are set some basic rules. These rules are easy for them to understand and are always said in a positive way. * Never poke the animal or do anything that you yourself wouldn’t like. * Make sure you wash your hands after touching the reptiles. There is always the other 20% of children who don’t feel comfortable holding or touching the animals - they prefer to just look and this is fine. These children can still learn a lot and sometimes they just need a bit more time to watch you hold the animal and understand them before they feel comfortable. I actually prefer this as I know that they will respect the animal and have some understanding of it. This is better than the children diving in and maybe hurting the animal because they have not listened. 14 My daughter, Chloe, 5yrs, has shown a fantastic interest and respect for reptiles. We have been lucky that she keeps a safe distance and obeys our rules when dealing with venomous snakes and their removal. Such a thing cannot be expected by every child and each needs to be assessed individually if they are to come close to these animals. I do not promote or encourage venomous snakes and children to mix. Reptiles can be a fun and exciting experience for children and encourage responsibility along with a greater understanding of our native animals and how they live. The best first reptiles or invertebrates for children are: Blue tongue lizards Shingle back Skinks Bearded dragons Long neck Turtles Children’s Python or equivalent Green Tree Frogs Stick insects There are times when lines are drawn and strict rules need to be in place. Examples of this include instances when venomous snakes or larger, more dangerous animals such as goannas are being shown. Of course when demonstrating venomous snakes and some larger goannas, the animals should only be touched by or come close to the demonstrator. These animals can be obtained through your local breeder or pet store. No animal should be taken from the wild. When keeping venomous snakes privately they should always be housed in a locked enclosure, off the ground and out of the child’s reach. One effective system used by many keepers to clearly identify potentially dangerous animals is the colour system. A sticker or coloured piece of paper is placed on every enclosure that contains an animal. Dangerous animals are identified by a red sticker, while harmless animals have blue or green. Red, even to the smallest child is associated with hot, stop, dangerous etc and therefore clearly identifies the animals children should never try to touch. Blue or green are associated with calming, go, cold etc. and children can therefore recognise harmless animals. 15 KEEPING AND BREEDING THE COASTAL TAIPAN OXYURANUS SCUTELLATUS by Brian Barnett Originally published in Thylacinus in 1986. Reprinted in Monitor Vol10 Issue 2/3 1999 INTRODUCTION Female 7. Born Oct. 1980 from female 3 & male 2. The Taipan is one of Australia’s largest venomous and most dangerous snakes, occurring widely in northern Australia with an endemic sub-species in New Guinea (Cogger, 1983). In recent years its popularity in reptile collections has increased. Here in Victoria, we are more fortunate than some of our interstate counterparts in that private keepers are allowed to legally keep these reptiles. Female 8. Born Dec. 1981 from female 5 & male 1. Female 9. Born Dec. 1981 from female 5 & male 1. Male 1. Born Feb. 1978 from female 2 & male 2. Male 2. Collected from the Cairns region, north Queensland, 1977. The adult snakes are housed individually in cages designed to maximise the use of the space available in a confined area. The design allows other cages to be placed on top and also offers a degree of safety without the normal top or front opening door or lid. The hinged lid is set at an angle of 45 deg. reducing the area of the front and top but resulting in a module with easy and safe access. See Figure 1 in Barnett (1978). Captives are alert and by snake standards appear to be highly intelligent. This paper has been written in response to repeated questions by colleagues in relation to my previous successes in breeding the species. The floor area of each individual unit measures 60cm x 75cm, the height at the back is 90cm and the front height is 60cm. A viewing window, 20cm x 15cm, is fitted into the particle board lid. Juvenile Coastal Taipan MATERIALS AND METHODS Eight females and two males contributed to the breeding results of this paper, and throughout the tables are numbered for cross reference. An additional female (No. 9) was used to obtain the results in the section relating to growth rates. Each new born clutch is housed in a series of three top opening cages each measuring 60cm x 48cm floor area x 46cm in height. A viewing window, 36cm x 18cm, is fitted into the lid. Female 1. Collected from the wild as a gravid specimen, Rockhampton, Queensland, 1972. Female 2. Collected from the Cairns region, north Queensland, 1977. Pre-washed fine aquarium gravel is used as the ground cover and regularly topped up as the soiled areas are scooped out. A rock of suitable size is also placed on the floor area to be of assistance in sloughing and to block the hide box entrance whilst cleaning. Female 3. Collected from the Cairns region, north Queensland, 1977. Female 4. Born Feb. 1978 from female 2 & male 2. A wooden hide box, floor area 45cm x 20cm and 15cm in height, is supplied in each adult unit. These have hinged lids. The newborns are supplied with upturned Female 5. Born Feb. 1978 from female 2 & male 2. Female 6. Born Oct. 1980 from female 3 & male 2. 16 plastic cereal bowls with a small entrance opening cut out of the side. In particular with the young, the hide bowls are constantly used and the young seem far less nervous than those that were not given hide bowls in the past. Similar plastic cereal bowls are used as the drinking water containers. They are of the stackable type which fit tightly into each other. One is fixed to the floor of each unit and the other is placed within this one. It is easily removed and replaced as fresh water is supplied. The fixing of one bowl to the floor eliminates any possible upturning of the second bowl and subsequent spillage. A plastic vent, 12cm x 7cm, is fitted into the lid or wall of each unit. No natural light is supplied and each unit receives daylight hours of lighting by means of incandescent bulbs (15 watt). However, the reptile house itself is fitted with 1.2m ‘True-Lites’ throughout and this provides additional lighting during daylight hours. Coastal Taipans mating, note the swollen area on the female, indicating a swollen, inserted hemipenis The age of the females at first introduction was varied but two individuals were first mated at 20 months of age when their total body length was approximately 2 metres. As the Taipan matures at a much smaller size than this, 78cm SVL for males and 101cm SVL for females (Shine & Covacevich, 1983) it should be possible to breed them at an even earlier age. I have achieved the maturity sizes documented by Shine & Covacevich (1983) with several specimens at five to seven months. Heating to the adult units was initially supplied by 150 watt Infra-red globes. This was later changed to a series of three 40 watt blue coloured incandescent globes in each unit. The blue globes are used to keep the night time hours in relative darkness when these lights may be on. The heating lights are controlled by a thermostat and each unit maintains a temperature of 26 – 28 degrees Celsius. This temperature is maintained through the year and no seasonal changes are made. A second mating for the year was recorded for three individual specimens. The previous matings were all early in the mating range, months four, five and six, and the duration between matings was 134, 77 and 93 days. The second matings were all achieved in the more regulation period of late winter, early spring. Feeding of the adult snakes is year round and on average three times per month. Six mice or one rat to a weight of around 150gm is readily taken per feed. The newborns and sub adults are fed on a rotation system and depending on time and food available may be fed up to three times per week. EGG-LAYING The Taipan is a hardy snake in captivity and provided due respect is given to this extremely alert snake no unusual problems should be encountered. The eggs are laid in the hide box 11-14 days following the pre-laying slough, a feature also observed at the Melbourne Zoo (Banks, 1983). No nesting material is provided and the female coils tightly, creates a shallow depression in the gravel and commences laying. I have been present for most of the layings and the majority of eggs have been removed individually, with a spoon scoop, with the female showing little concern in this intrusion. RESULTS - ALSO SEE TABLES (AT END OF THIS PAPER) The male is introduced to the female immediately following the sloughing of the female. In the adult snakes sloughing occurs six to seven times per year at intervals of 46-67 days, mean 58 days, giving adequate opportunities for introductions. Normally, copulation occurs within hours and continues for up to six hours. The male is removed following the completion of copulation. The snakes have been successfully mated over seven months of the year from mid autumn, through winter and into mid spring. No matings have been achieved during the summer months (table 1(a) and (b).) although introductions were made. N. Charles records one mating in early December (Shine & Covacevich, 1983). The most productive period being late August – early September. Coastal Taipan Laying Eggs 17 The laying of five individual clutches were recorded for periods between egg laying. Depending on the size of the clutch and the number of smaller infertile eggs, which were deposited at a faster rate, the laying period ranged from six hours 16 minutes to seven hours 58 minutes. The mean period between individual eggs of the five clutches was 29.4 minutes (23-37). 32.4mm (29.4 – 34.8), n = 16. Two clutches, from the one mating, were recorded from two individual specimens (Table 2), indicating sperm retention, a phenomenon also recorded by other herpetologists (Peters, 1972; Banks, 1983). The inter-clutch periods were 66 and 69 days. The fertility rates were 44 & 75%. The period from copulation to oviposition in all but one instance ranged from 61-85 days, mean 69 days (Table 2). The eggs are incubated in clear top plastic bread containers using vermiculite as the medium (Barnett, 1981. 100ml of water is added to 150g vermiculite giving the medium a depth of 3cm in the container. A fine spray of water is added at a future date if required. The relative humidity is kept high. The temperature range during incubation is 29.5 – 32 degrees Celsius. Mean (fertile) egg weight per clutch at oviposition 32.9gm (24.2 – 36.7), n = 13. INCUBATION HATCHING Pre-hatch measurements and weights (1-2 days before slitting) were taken of six clutches and although minimal, all but one clutch registered weight loss. The clutch with the weight gain averaged 0.4g/egg. Weight losses per clutch varied from 1.4-5.0g/egg. Lengths varied from a gain of 0.5mm to a loss of 0.6mm/egg. The diameter varied from a gain of 0.7mm to a loss of 0.5mm/egg. Coastal Taipans mating Clutch No. 19 was laid 155 days following the only observed mating. Although a male was present in her cage for several days up to 82 days prior to her laying, no indication of attempted mating was observed and under the conditions that they are kept, the period over which copulation occurs and my regularity of checking such introductions, I believe that this laying would be the result of sperm retention from the earlier observed mating. The female had not been bred previously and had shown no signs of being gravid in the expected period from the observed mating. It did not come up for its pre-laying slough anywhere near the time that it would have been expected in the range after the observed mating. It also laid well outside the range of all other clutches (February) and in normal circumstances this would be the result of a summer mating, the period in which I have not recorded any matings or the males having shown any interest in the females. Coastal Taipan hatching Five completed clutches were not incubated. Several were not required whilst others were used to photograph and collect embryos at varying stages and experimenting with the open egg in a humicrib (Barnett, 1980). The incubation periods ranged from 62-71 days (n=15), mean 67. The percentage of eggs hatching from those placed under incubation ranged from 67-100% - mean 94% (n=15). The following data on eggs of Oxyuranus scutellatus has been determined from Table 3. Mean clutch size: 14 eggs (9-20). Upon slitting the eggs the young snakes usually emerge within 1-2 days. The young were weighed and measured at birth and all clutches are summarized in Table 4. Clutch #8 was the exception in size and weight and several of the very low weight range in the other clutches were found to have encountered restrictions on food supply with in the egg. The tail The fertility rate was 78% (40-100). Mean (fertile) egg length per clutch at oviposition: 56.4mm (47.6 – 65.8), n = 16. Mean (fertile) egg diameter per clutch at oviposition: 18 measurements of the young averaged out to 15% of the total body lengths. undersized young but generally only for a short period. GROWTH REARING OF YOUNG Growth can be extremely rapid and it was quite common for my specimens to exceed 1.7 metres (total) at 12 months of age and 2.1m at 24 months of age. Each clutch of young is housed in a series of three cages as described in ‘Materials and Methods’. The middle cage is only used for feeding and the snakes are offered food individually. As one snake is moved from one cage, is fed in the middle cage and is then moved onto the other end cage. This is repeated until all the young have been fed and the next feed is a transfer back to the other end. Stubborn feeders can be left in the feed section overnight. I have found this rotation system to be very effective with raising young and can save valuable time whilst maintaining a large collection. The following tables relate to the growth of one individual over a three year period. All food was weighed before it was offered as a feed. The snake was measured at regular periods over the first 14 months and less regularly over the latter period. The snake was starved for a short period before weighing to ensure accurate body weights. The number of sloughs and the period between them were also recorded. The young Taipans prefer moving prey and many have been reluctant to accept day old mice whilst readily accepting pre-weaner mice. The average sized hatchling Taipan is quite capable of eating a mouse up to 10gm in weight. Unlike the snap and release action of the adult snakes, the young attain a firm grip on the mice. This action may continue for a month or so when it changes to the snap and release method. ACKNOWLEDGEMENTS Keith Day ‘introduced’ me to the Taipan many years ago when I lived in Queensland. Roy Pails of Ballarat loaned me one of the breeding males when requested. Chris Banks of the Royal Melbourne Zoo gave advice when asked. Bruce and Keiron Howlett retyped the manuscript at short notice. I particularly thank my family Lani, Brett and Ty who have given up so much to allow me to pursue my interests in herpetology to such a degree. With few exceptions, the young snakes have been exceptionally good feeders once offered the larger mice. Force feeding had to be applied to the occasional Table 1a. Times of male matings resulting in fertile eggs. JAN FEB MAR Male # 1 Male # 2 APR 1 MAY 1 1 JUN 1 1 JUL 1 AUG 4 SEP 4 2 OCT AUG SEP 2 OCT 1 2 2 NOV DEC NOV DEC 1 Table 1b. Times of female matings resulting in fertile eggs. JAN Female #2 Female #3 Female #4 Female #5 Female #6 Female #7 Female #8 FEB MAR APR 1 MAY JUN 1 1 JUL 1 1 1 1 1 1 1 19 Table 2. Reproductive periods for Oxyuranus scutellatus . Number Female No. Male No. Month Mated Pre-laying Slough (days) Month Laid 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 7 8 n/a 2 2 2 2 2 ** 1 1 ** 1 2 1 1 1 1 2 1 1 1 n/a 9 9 10 6 5 ** 9 8 ** 9 4 8# 5 8# 7 6 9# 9 8 n/a n/r n/r n/r n/r n/r n/r n/r n/r 13 11 12 12 13 13 13 14 11 14 14 10 12 11 12 8 7 9 12 10 12 12 6 10 8 10 10 8 11 2 10 n/a – Not available. n/r – Not recorded. * - Eggs not incubated. Copulation to Laying (days) n/a n/r 73 69 72 71 66 79 66 69 68 74 61 67 68 85 64 62 155*** 65 Month Born * 2 * * 10 9 12 2 * * * 9 12 10 12 12 10 1 5 12 Incubation Period (days) * 65-66 * * 66-67 65 65 66 * * * 64-68 66-68 62-66 65-68 66 68 68-71 68 70 ** - The second clutch from the one mating. # - The second mating for the year. *** - Explained under 'egg-laying' Table 3. Reproductive periods for Oxyuranus scutellatus . Clutch No. Female No. Number Fertile Number Infertile 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 7 8 17 9 14 9 10 9 4 9 10 12 10 15 8 17 16 10 10 12 12 4 2 3 0 0 1 4 5 11 7 4 5 2 6 1 0 1 1 1 5 6 Mean fertile egg Mean fertile egg length (mm) diameter (mm) 65.8 64.0 58.3 47.6 56.1 54.9 54.2 57.5 59.0 55.0 56.5 54.4 58.5 51.6 50.6 59.4 20 n/r (59.7-71.7) (54.7-69.8) n/r (49.0-67.0) n/r n/r (43.2-51.2) (50.2-62.8) (51.5-61.1) (49.4-59.5) (45.0-66.0) (46.9-67.0) (51.4-68.6) (50.6-64.6) (46.1-65.1) (56.1-65.8) (48.5-58.1) (46.6-62.5) (53.4-64.5) 34.8 34.4 32.4 29.4 33.8 31.3 29.7 31.9 32.0 33.4 33.4 32.1 32.3 32.1 34.0 31.2 n/r (32.1-39.2) (32.7-34.7) n/r (31.0-34.0) n/r n/r (28.0-30.4) (32.9-35.0) (29.8-33.0) (27.9-31.5) (27.0-34.5) (29.2-34.0) (32.9-34.9) (31.7-34.5) (30.9-34.3) (31.0-33.4) (30.5-33.3) (31.3-35.7) (30.6-31.6) Mean egg weight (g) 24.2 35.8 31.5 28.1 34.6 36.7 34.5 35.4 32.4 36.2 30.2 33.3 34.9 n/r n/r n/r n/r n/r n/r n/r (22.0-26.5) (32.2-39.1) (27.3-34.0) (24.0-31.9) (17.0-39.4) (27.1-47.2) (31.4-38.9) (32.0-39.7) (24.7-39.2) (33.6-38.3) (28.6-31.9) (29.2-36.4) (30.0-39.7) Coastal Taipans mating, note the swollen area on the female, indicating a swollen, inserted part of the hemipenis exposed Juvenile Coastal Taipan Table 4: Data on hatchling Oxyuranus scutellatus . Clutch No. Female No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 7 8 No. of young Hatched 0 9 ** ** 10 9 4 6 ** ** ** 13 8 15 16 8 10 12 11 4 Mean hatchling lengths (mm) Tail Total 297 364 384 401 392 417 407 373 n/r n/r n/r n/r (237-330) n/r (304-415) (296-428) (362-414) (351-418) (403-430) (396-426) n/r (330-403) n/r n/r n/r n/r 56 (43-61) n/r 62 (25-76) 69 (51-76) 69 (46-73) 70 (62-75) 76 (73-78) 73 (69-78) n/r 67 (59-72) 353 447 425 453 470 462 494 480 440 SVL Mean hatchling weights (g) 490 n/r n/r n/r (280-389) (380-495) (329-489) (347-504) (427-487) (413-493) (481-505) (468-504) n/r (330-403) n/r n/r n/r n/r 14.4 (8.1-16.2) 24.2 (17.3-27.2) 25.7 (17.3-27.2) 21.3 (9.1-25.91) 23.7 (16.3-26.4) 22.7 (15.3-28.2) 25.8 (21.5-27.3) 22.1 (19.3-23.4) n/r 24.1 (20.6-26.8) ** These five clutches were not incubated. Coastal Taipan laying eggs Coastal Taipan hatching 21 Table 5. Food intake and weight increase for an Oxyuranus scutellatus from hatching to 36 months of age Month Birth 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Weight (gms) 35.9 72.5 115.1 162 201 257.4 319.7 379.3 479.8 606.4 817.9 915.9 1002.6 1162.3 1351.6 1502.8 1822 2377 Food - Month Food -Total (gms) (gms) 73.6 115.6 138.2 124.5 149.2 205.3 228.1 276 346.7 499.3 306.8 293 456.7 545.4 352.3 254.8 325.5 280.8 380 115.4 441.6 105.5 229.7 64.9 183.9 431.4 59.6 420.1 528.7 346.9 324.7 335.6 757.9 545.7 172.1 215.6 73.6 189.2 327.4 451.9 601.1 806.4 1034.5 1310.5 1657.2 2156.5 2463.3 2756.3 3213.0 3758.4 4110.7 4365.5 4691 4971.8 5351.8 5467.2 5908.8 6014.3 6244.0 6308.9 6492.8 6924.2 6983.8 7403.9 7932.6 8279.5 8604.2 8939.8 9697.7 10243.4 10415.5 10631.1 Weight Gain (gms) % Monthly Food to Bodyweight 36.6 42.6 46.9 39 56.3 62.3 59.6 100.5 126.6 211.5 98 86.7 159.7 189.3 49.7 36.8 33.9 31.3 37.7 30.3 26.1 36.4 36.5 42.3 31.9 29.5 34.9 34.7 151.2 (2 Mths) 24.9 319.2 (7 Mths) 16.9 555.0 (13 Mth) 12.6 Table 6. Length gain and sloughing data for one Oxyuranus scutellatus from hatching to 36 months of age. Month Birth 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Total Length (mms) Monthly Gain (mms) 489 751 855 970 1094 1178 1260 1330 1420 1532 1653 1720 1789 1860 1998 262 104 115 124 84 82 70 90 112 121 67 69 71 138 2084 86 (2 Mth) 2184 2332 Sloughed (Date) Duration Between Sloughs (days) 16-Dec 8/1, 30/1 21-Feb 20-Mar 14-Apr 16-May 21-Jun 18-Jul 14-Aug 16-Sep 26-Oct 8 after birth 23, 22 22 28 25 32 36 27 27 33 40 8-Dec 17-Jan 21-Feb 28-Mar 43 40 35 35 23-May 56 24-Jul 62 29-Sep 67 7-Dec 19-Jan 69 43 5-Mar 47 2-May 14-Jun 58 43 5-Aug 27-Sep 52 53 20-Nov 54 100 (7 Mth) 148 (13 Mth) 22 LITERATURE CITED Banks, C.B. 1983. Breeding the Taipan at the Royal Melbourne Zoo. International Zoo Yearbook. 23. Barnett, B.F. 1978. Taipan. Newsletter of the Victorian Herpetological Society, 9:16-20. Barnett, B.F. 1980. Captive breeding and a novel egg incubation technique of the Children’s Python (Liasis childreni). Herpetofauna 11(2):15-18. Barnett, B.F. 1981 Artificial incubation of snake eggs. Monitor 1(2):31-39. Cogger, H.G. 1983 Reptiles and Amphibians of Australia (Revised Edition) A.H. and A.W. Reed. Sydney. Peters, U. (1973) Breeding of the Taipan (Oxyuranus scutellatus) in captivity. Bull. Zoo Man. 4(1):7-9. Shine, R. and J. Covacevich (1983) Ecology of highly venomous snakes: the Australian genus Oxyuranus (Elapidae). Journal of Herpetology, 17:60-69. The Coastal Taipan Oxyuranus scutellatus is the largest species from the elapid family of snakes in Australia. Some texts say it grows to over 300cm. Worrell (1963), for example, notes, “. . . Length may exceed ten feet; six feet is average”. However, none of the many specimens held in museum collections in Australia exceeds 300 cm. Reptile keeper Joe Sambono and “Terrence” The Victorian Herpetological Society would like to thank the owner of the snake, Joe Sambono (pictured here with Terrence), the photographer, Simon Fearn and the Queensland Museum for allowing us to use material from their site. Professor Rick Shine, University of Sydney, measured all the Coastal Taipans in museum collections in the early 1980s. The largest one, a male, had a snoutvent length of 226 cm. This would have a total length of about 260 cm. No new extra-large Coastal Taipans were lodged in Australian museum research collections untill ‘Terrence’ died. The taipan is one that was bred by Brian Barnett and supplied to Joe Sambono. Terrence was the ‘pet’ of Joe Sambono Jnr, a friend to herpetologists from the Queensland Museum. Terrence, with a snout-vent length of 242.5 cm and a total length of 290 cm, died after seven and a half years in captivity. He had been raised ‘out of the egg’, by Joe. Joe was very sad that Terrence had died. However, Joe’s curatorial friends at the Museum were elated to receive such a large specimen, when one was needed for the public display programme. When Terrence died, he weighed 6.2 kg. At 290 cm, he was the largest Coastal Taipan whose length was measured, not just estimated. The measurement can be checked by anyone interested, because the specimen is in the research collection of the Queensland Museum. At the Queensland Museum, Terrence was moulded and cast in a life-like pose for display. The cast, painted in exquisite detail by museum preparator Alison Hill, is now a feature of the exhibition, “Wildlife of Cape York Peninsula”. This can be seen in the Cooktown Interpretive Centre, overlooking the restored, historic botanic gardens in Cooktown, north-eastern Queensland. 23