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Gonyosoma Oxycephalumrobert W WWW.IRCF.ORG/REPTILESANDAMPHIBIANSJOURNALTABLE OF CONTENTS IRCF REPTILES & AMPHIBIANS IRCF REPTILES • VOL15, &NO AMPHIBIANS 4 • DEC 2008 189 • 22(1):32–33 • MAR 2015 IRCF REPTILES & AMPHIBIANS CONSERVATION AND NATURAL HISTORY TABLE OF CONTENTS FEATURE ARTICLES . ChasingA Bullsnakes Gravid (Pituophis catenifer sayi Indonesian) in Wisconsin: Red-tailed On the Road to Understanding the Ecology and Conservation of the Midwest’s Giant Serpent ...................... Joshua M. Kapfer 190 . The Shared History of Treeboas (Corallus grenadensis) and Humans on Grenada: GreenA Hypothetical Ratsnake Excursion ............................................................................................................................ (Gonyosoma oxycephalumRobert W. Henderson 198 RESEARCH[Boie ARTICLES 1827]) in the Pet Trade . The Texas Horned Lizard in Central and Western Texas ....................... Emily Henry, Jason Brewer, Krista Mougey, and Gad Perry 204 . The Knight Anole (Anolis equestris) in Florida 1 2 3 .............................................SimonBrian Dieckmann J. Camposano, Kenneth, Gerrut L. Krysko, Norval Kevin M., andEnge, EllenJean-Jay M. Donlan, Mao and Michael Granatosky 212 1Ji-an Township, Hualien County, 973, Taiwan, R.O.C. ([email protected]) CONSERVATION ALERT 2Applied Behavioural Ecology & Ecosystem Research Unit, Department of Environmental Sciences, UNISA, Republic of South Africa (corresponding author: . World’s Mammals in Crisis .............................................................................................................................................................gnorval@gmail.com) 220 . More Than Mammals ...................................................................................................................................................................... 223 3Department of Forestry and Natural Resources, National Ilan University. Ilan, 260, Taiwan, R.O.C. ([email protected]) . The “Dow Jones Index” of Biodiversity ........................................................................................................................................... 225 HUSBANDRY Photographs by the senior author. Captive Care of the Central Netted Dragon ....................................................................................................... Shannon Plummer 226 PROFILE he Red-tailed Green. Kraig Adler:Ratsnake A Lifetime ( GonyosomaPromoting Herpetology [Elaphe ................................................................................................] oxy- Michael L. Treglia 234 cephalum [Boie 1827]; Fig. 1) occurs in lowland (< 750 T COMMENTARY m asl) primary and secondary. The Turtles Have forests Been Watching in parts Me ........................................................................................................................ of Cambodia, Eric Gangloff 238 India, Indonesia, Laos, Malaysia, Myanmar (= Burma), the Philippine Islands,BOOK Singapore, REVIEW Thailand, and Vietnam . Threatened Amphibians of the World edited by S.N. Stuart, M. Hoffmann, J.S. Chanson, N.A. Cox, (Schulz 1996). In captivity,R. Berridge, G. oxycephalumP. Ramani, and B.E. Youngrequires .............................................................................................................. tall spa- Robert Powell 243 cious humid terraria that should be kept fairly warm (25–29 ºC) (Schulz 1996). TheseCONSERVATION snakes are RESEARCH quite largeREPORTS: and Summariesexhibit of Published Conservation Research Reports ................................. 245 NATURAL HISTORY RESEARCH REPORTS: Summaries of Published Reports on Natural History ................................. 247 aggressive defensive NEWBRIEFSbehaviors ......................................................................................................................................................................................(Mattison 1999). In spite of 248 these challenges, these EDITORIAL snakes are INFORMATION imported and ..................................................................................................................................................... kept as pets in 251 FOCUS ON CONSERVATION many parts of the world (Heijnen 1988). : A Project You Can Support ............................................................................................... 252 On 29 November 2013, the first author obtained a male and female G. oxycephalum from a pet importer in Taiwan, who stated that the snakes were Frontcollected Cover. Shannon from Plummer. the wild Back Cover. Michael Kern in Indonesia. The female (Fig. 2), Totatwhich et velleseque had a audant total mo length Totat et velleseque audant mo of ca. 150 cm, appeared emaciated.estibus On inveliquo the morning velique rerchil of 30 estibus inveliquo velique rerchil erspienimus, quos accullabo. Ilibus erspienimus, quos accullabo. Ilibus November 2013, we discovered thataut dolor she apicto had invere deposited pe dolum six aut dolor apicto invere pe dolum eggs during the previous night. The fugiatiseggs maionsequatranged in eumque length and fugiatis maionsequat eumque moditia erere nonsedis ma sectiatur moditia erere nonsedis ma sectia- ma derrovitae voluptam, as quos tur ma derrovitae voluptam, as accullabo. Fig. 2. The Red-tailed Green Ratsnake (Gonyosoma oxycephalum) female described herein, after acclimation to her cage. width from 60 to 68 mm (mean ± SD = 63.2 ± 2.9 mm) and 23 to 27 mm (mean ± SD = 25.2 ± 1.7 mm), respectively. The eggs were bound together and had a combined weight of 122 g. No attempts were made to separate the eggs, and after the length, width, and weight of the eggs were recorded, they were placed inside an incubator. The daytime temperature in the incubator was ca. 29 ºC and ca. 27 ºC at night. Moisture in the incubator was maintained at 85–95%. The relative clutch Fig. 1. The Red-tailed Green Ratsnake (Gonyosoma oxycephalum) is pri- mass (0.35) was calculated using the formula: total clutch marily an arboreal species. weight / maternal post-oviposition body weight (Shine 1980). Copyright © 2015. Simon Dieckmann. All rights reserved. 32 DIECKMANN ET AL. IRCF REPTILES & AMPHIBIANS • 22(1):32–33 • MAR 2015 The hatchlings started to emerge on 1 March 2014 and the last hatchling emerged from its egg the following day. To avoid injury to the hatchlings, we made no initial attempts to sex them; when they were a few weeks old, we sexed them by cloacal popping and determined that three were males and three were females. The hatchlings resembled the adults in col- oration (Figs. 3 & 4), and no color-based sexual dimorphism was noted. The hatchlings ranged in total lengths (measured with a ruler to the nearest cm) and body weights from 39 to 47 cm (mean ± SD = 43.8 ± 2.7 cm) and 19 to 22 g (mean ± SD = 20.3 ± 1.4 g), respectively. They were housed independently in small plastic animal cages (length x width x height = 45 x 25 x 25 cm); and each cage was provided with a water bowl and a shelter, and paper towels were used as a substrate. An understanding of the natural history of a species is Fig. 4. Two of the Red-tailed Green Ratsnake (Gonyosoma oxycephalum) essential for successful conservation and management pro- hatchlings described herein. grams (Greene 1994; Bury 2006), and a crucial part of the natural history of any species is its reproductive biology. Although information from animals in captivity should be ca. 46 cm; ca. 18.5 g), and Schulz (1996; total length 40–55 interpreted with caution, it can be incorporated with data col- cm). To our knowledge this is the first reported description of lected from the wild to develop a better understanding of the a G. oxycephalum relative clutch mass, so no comparisons can life history of a species. Clutch sizes of G. oxycephalum range be made. from five to 12 eggs (Schulz 1996), and eggs are about 70 The trade in reproductive females, as described herein, mm in length (Heijnen 1988; Das 2002), so our observa- should be avoided as far as possible. The loss of reproductive tions are not exceptional. The incubation period in our study females collected from the wild negatively affects the viability (91 days) is shorter than the 100–120 days reported by Das of the population from which they are removed because it not (2002) and the 122 days reported by Heijnen (1988), but is only entails the removal of the female, but also the young that slightly longer than the 85 days reported by Van Riel (1991). could have been recruited into the population. In addition, The hatchlings described herein were similar in size and the physical demands of reproduction, combined with the weight to those reported by Heijnen (1988; total length ca. stress associated with quarantine, shipment, and acclimation, 47–50 cm; weight ca. 15–22 g), Van Riel (1991; total length inevitably reduce the likelihood of survival. We thus recommend that season and/or size-limit restric- tions be implemented for wild-caught reptiles in the pet trade. This would increase the likelihood that animals are collected outside the breeding season or involve only individuals that are not yet sexually mature. Literature Cited Bury, B.R. 2006. Natural history, field ecology, conservation biology and wild- life management: Time to connect the dots. Herpetological Conservation and Biology 1:56–61. Das, I. 2002. A Photographic Guide to Snakes and Other Reptiles of India. New Holland Publishers Ltd., London, UK. Greene, H.W. 1994. Systematics and natural history, foundations for understand- ing and conserving biodiversity. American Zoologist 34:48–56. Heijnen, G.H. 1988. De verzorging van en de kweek met de spitskopslang (Gonyosoma oxycephala). Lacerta 47:24–29. Mattison, C. 1999. Snake. Dorling Kindersley Ltd., London. Schulz, K.D. 1996. A Monograph of the Colubrid Snakes of the Genus Elaphe Fig. 3. Red-tailed Green Ratsnake (Gonyosoma oxycephalum) hatchlings Fitzinger. Koeltz Scientific Books, Koenigstein, Germany. described herein ranged in coloration from the typical green coloration of Van Riel, C.A.P. 1991. Voortplanting in het terrarium van de Roodstaartslang this species to the grayish coloration associated with some snakes from Java. (Gonyosoma oxycephala). Lacerta 50:39–42. 33.
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