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作者Chi-Ying Lee1, David A. Pike2, Hui-Yun Tseng3,4, Jung-Ya Hsu3,5, Shiang-Lin Huang6, Pei-Jen L. Shaner7 , Chen-Pan Liao3,8 , Andrea Manica9, and Wen-San Huang3,5,8*
出版日期201904
著作名稱When males live longer: Resource-driven territorial behavior drives sex-specific survival in snakes
刊名Science Advances
5
頁數eaar5478
被收錄索引SCI
摘要The tendency for females to have higher survival, and thus live longer, than males has been attributed to the latter’s propensity to engage in aggressive encounters. This hypothesis has been supported by phylogenetic analysis. Here we provide further evidence by looking at an egg-eating snake (Oligodon formosanus) with plastic territoriality. In this species, females become territorial in the presence of sea turtle eggs, a highly valuable resource. We took advance of a natural phenomenon to perform a natural experiment. We collected data from before and after a storm eroded the beach on which turtles nested at our study site, thus removing the high value resource and leading to a loss of territoriality. By comparing from before and after the storm together with similar data from another study site where turtle eggs remained available, we were able to show that territoriality was the driver behind higher injury rates in females. Territorial females also had lower survival and decreased longevity compared to the non-territorial males, but these differences disappeared when females were not territorial. Our study lends insights into the proximate and ultimate drivers of territoriality, and how resource availability can influence the evolution of sex-specific patterns of survival across vertebrates.
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計畫主持人黃文山
計畫委託單位科技部
系統號NO000005119

Aug 20 2021 11:12:17
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