首页|First reproduction of Panha's crocodile newt Tylototriton panhai in captivity, with a description of the courtship behaviour, eggs and larval development

First reproduction of Panha's crocodile newt Tylototriton panhai in captivity, with a description of the courtship behaviour, eggs and larval development

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Amphibians are facing extinction on a global scale and maintaining small populations of threatened or endangered species in captivity is essential. In connection with potential captive breeding of Panha's crocodile newt, Tylototriton panhai, we report a detailed husbandry protocol and describe breeding and mating behaviour. After six years in captivity, a group of two adult females and six males, tentatively identified as T. panhai, successfully reproduced for the first time on 24th June 2020 after a heavy rainstorm and two subsequent days of precipitation when water temperatures in a large aquaterrarium placed outdoors were 18-21 °C. The complete courtship behaviour consisted of five main stages: i/ approach; ii/ nuptial dance; iii/ amplexus; iv/ spermatophore deposition; v/ fertilisation. The two females laid a total of 84 eggs (41 and 43 eggs each) that were deposited on land in clutches of 4-22 eggs or even singly. Egg size averaged 12.6 ± 0.4 mm and the mean size of the embryo capsule 5.1 ± 0.1 (n=84). The egg hatch success rate was ~80% and on hatching the larvae moved to the water at the bottom of the aquaterrarium. By 7-9 days after hatching the total larval length was 11.89-13.78 mm (n=67). Diagnostic morphological characters are provided for stages 30-46. Metamorphosis occurred at 99-102 days and efts started to move to land at an average total length of 56.2 mm and weight of 0.6-0.9 g.

First reproductioncrocodile newt Tylototritoncourtship behaviour

AXEL HERNANDEZ、PORRAWEE POMCHOTE、ARNAUD JAMIN

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Department of Environmental Sciences, Faculty of Sciences and Technics, University Pasquale Paoli of Corsica, Corte, 20250, France

Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand

Le Theil, Le Guedeniau, 49150, France

2022

10.33256/hb159.611

The herpetological bulletin

The herpetological bulletin

ISSN：1473-0928
年,卷(期)：2022.159