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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2020 Vol.39 No.2

Sexual Dimorphism in Bite Force of Trachemys scripta elegans
Author of the article:LI Handong, WANG Tongliang, HU Zhenyi, RAO Jingqiu, SHI Haitao, WANG Jichao*
Author's Workplace:Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
Key Words:sexual dimorphism; bite force; Trachemys scripta elegans; diet; head width
Abstract:Bite force is an important indicator of animal ecological adaptability, however, the morphologic characteristics can generally reflect the bite force. To study bite force dimorphism in the red-eared slider (Trachemys scripta elegans) and its relationship with morphologic index, the force value sensors were used to measure bite force in female (n=16) and male (n=14) T. scripta elegans. We also analyzed the correlation between the bite force and morphologic index (body mass, carapace length, head length, head width, head height) of T. scripta elegans. The results showed that bite force was significantly higher (P=0.047) in females (71.92 N±15.59 N) than in males (55.24 N±10.09 N). Body mass, carapace length and head width were also significantly higher in females than in males. There was a significant linear relationship between bite force and head length, head width, and head height (P<0.05). Our study suggested that the bite force of T. scripta elegans is dimorphism, and bite force sex differences may be related to dimorphism in head width. Female T. scripta elegans can increase their bite force and feeding efficiency to meet the energy requirements of large size and reproduction, and to increase their fitness.
2020,39(2): 183-188 收稿日期:2019-09-11
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