文章基本信息

标题：Within population variation in testis size in the mole-shrew (Anourosorex squamipes) (Mammalia: Soricidae)
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作者：W. B. LIAO ; W. M. XIAO ; Y. L. CAI 等
期刊名称：The European Zoological Journal
电子版ISSN：2475-0263
出版年度：2013
卷号：80
期号：2
页码：204-209
DOI：10.1080/11250003.2013.777477
语种：English
出版社：Taylor & Francis Group
摘要：Sperm competition is recognized as a key event occurring during postcopulatory sexual selection. The evolutionarily stable strategy (ESS) predicts that males in poor condition should invest more heavily in sperm compared with males in good condition. We explored the effects of body condition and season on testes mass in the mole-shrew (Anourosorex squamipes). We used the “scaled mass index” as body condition to analyze the effects of season, body condition and body length on testis size. The results showed that testes mass was greatest in summer. Head body-length also significantly affected testis size in the four seasons. In addition, males in good conditions had relatively heavier testes than those in poor conditions in spring, summer and autumn, but not in winter, suggesting that the finding contradicts the prediction of the evolutionarily stable strategy.
关键词：Body condition; head body-length; sperm competition; sexual selection; testis size