Sheep grazing causes shift in sex ratio and cohort structure of Brandt’s vole:Implication of their adaptation to food shortage
作者机构：State Key Laboratory of Integrated Pest ManagementInstitute of ZoologyChinese Academy of SciencesBeijingChina College of Life ScienceUniversity of Chinese Academy of SciencesBeijingChina
出 版 物：《Integrative Zoology》 (整合动物学（英文版）)
年 卷 期：2016年第11卷第1期
页 面：76-84页
核心收录：
基 金：supported by the State Basic Research Program of the Ministry of Science and Technology(2007CB109100) the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB11050000)
主 题：age structure food resources population demography population regulation sex ratio
摘 要：Livestock grazing has been demonstrated to affect the population abundance of small rodents in grasslands,but the causative mechanism of grazing on demographic parameters,particularly the age structure and sex ratio,is rarely *** this study,we examined the effects of sheep grazing on the cohort structure and sex ratio of Brandt’s vole(Lasiopodomys brandtii)in Inner Mongolia of China by using large manipulative experimental enclosures during *** results indicated that sheep grazing significantly decreased the proportion of the spring-born cohort,but increased the proportion of the summer-born *** increased the proportion of males in both spring and summer *** addition,we found a negative relation between population density and the proportion of the overwinter *** results suggest that a shift in the cohort structure and the sex ratio may be an important strategy for small rodents to adapt to changes in food resources resulting from livestock grazing.
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