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Sexual Dimorphism of Internal Organ Mass in Bufo gargarizans gargarizans from Summer Population

Sexual Dimorphism of Internal Organ Mass in Bufo gargarizans gargarizans from Summer Population

Jianping Gou, Jianli Xiong*, Baoxia Dong, Zhennan Liu and Manman Hou

College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China

*     Corresponding author: xjlpanda@126.com

ABSTRACT

In this study, we investigated potential differences in internal organ mass between male and female Asiatic toads(Bufo gargarizans gargarizans), collected in central China during the summer 2015. Females differed significantly in the stomach, small intestine, large intestine, lung, and gonads compared to males; however, liver and fat bodies did not differ between the sexes. The sex difference of these organs may contribute to different energy requirements for reproduction between males and females. Our findings suggest that female toads invest considerable resources into gamete production compared to males, and greater internal organs in females are a consequences of high energy requirements for reproduction, which favors females to produce more high-energy eggs. 
 

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Pakistan Journal of Zoology

December

Vol. 51, Iss. 6, Pages 1999-2399

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