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Mating Ethogram of a Video-aided study of Mating and Parturition in Captive Chinese Crocodile Lizards (Shinisaurus crocodilurus)

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Asian Herpetological Research 2019年第4期10卷 253-260页

作者： Chengming HUANG Zhengjun WU Shuyi LUO Jiasong HE Chunsheng YANG Meng MENG Lu YAO Zhigao ZENG Key Laboratory of Animal Ecology and Conservation Institute of ZoologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University) Ministry of EducationGuilin 541004China Guangxi Key Laboratory of Rare and Endangered Animal Ecology Guangxi Normal UniversityGuilin 541004China Daguishan National Nature Reserve HezhouGuangxi 542800China Chinese Wildlife Conservation Association Beijing 100110China Department of Mammalogy American Museum of Natural HistoryNew York 10024USA Department of Anthropology Hunter CollegeNew York 10065USA

Mating behavior and parturition are important components in the life history of any species. The endangered Chinese crocodile lizard(Shinisaurus crocodilurus) is suffering dramatic population decreases in the wild. Successful captive breeding can provide individuals to be reintroduced into their natural habitat and help to restore the wild populations. studying the mating behavior and parturition of these lizards in captivity will enable us understand how is this ancient species reproduction and optimize artificial reproduction protocol. We studied the mating behavior and parturition of Chinese crocodile lizards in captivity using video recordings at the Daguishan National Nature Reserve, China, from 2015 to 2017. We analyzed pre-copulation and copulation, which occurred in mid-March to late May from all studied years. Pre-copulation and copulation lasted on average 7.51(n=11) and 27.45(n=11) minutes, respectively. We found that large-bodied male lizards have longer copulation periods, a pattern seen in other lizard species. In the mating event, males always initiated sex, while the females were passive. The duration of parturition lasted 153.8 ± 26.8(n=46) minutes, and larger females had heavier clutches. In addition, even though Chinese crocodile lizards represent an ancient lizard clade with primitive characteristics, they still abide by the reproduction patterns seen in most other lizard species.

关键词： lizard mating and reproduction behavior quantitive study

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