Female reproductive success in a species with an age-inversed hierarchy

作     者：Dorien DE VRIES Andreas KOENIG Carola BORRIES 

作者机构：Interdepartmental Doctoral Program in Anthropological SciencesStony Brook UniversitySUNYNYUSA Department of AnthropologyStony Brook UniversitySUNYNYUSA 

出 版 物：《Integrative Zoology》 (整合动物学（英文版）)

年 卷 期：2016年第11卷第6期

页      面：433-446页

核心收录：

学科分类：0710[理学-生物学] 0303[法学-社会学] 03[法学] 030302[法学-人口学] 0905[农学-畜牧学] 0906[农学-兽医学] 

基　　金：The study received permission from the Research Division of the Tribhuvan University (Katmandu) and the Ministry of Education, Culture Social Welfare (HMG, Katmandu), and complied with the laws and regulations of Nepal Long-term data collection at Ramnagar was supported by funding from the German Research Foundation Alexander von Humboldt-Foundation German Academic Exchange Service, Society for Technical Cooperation the Ernst-Stewner-Foundation 

主　　题：birth rate gray langurs offspring survival provisioning Semnopithecus schistaceus 

摘      要：In most group-living mammals,reproductive success declines with increasing age and increases with increasing *** effects have mainly been studied in matrilineal and in“age positivehierarchies,which are stable and in which high ranking females often outperform low ranking *** relationships are less well-under­stood in age-inversed dominance hierarchies,in which a female’s rank changes over *** analyzed demo­graphic data of 2 wild,unprovisioned groups of gray langurs(Semnopithecus schistaceus)near Ramnagar,Ne­pal covering periods of 5 years *** rank was unstable and *** measured reproductive success via birth rates(57 births),infant survival(proportion of infants surviving to 2 years)and number of off­spring surviving to 2 years of age(successful births)for 3 age and 3 rank *** found that old females performed significantly worse than expected(birth rate P=0.04;successful births P=0.03).The same was true for low ranking females(P=0.04,and P0.01,respectively).Infant survival was highest for young and mid­dle-aged as well as for high and middle ranking ***,the results for these unstable hierarchies were rather similar to those for stable hierarchies of other mammals,particularly several nonhuman ***­pared to a provisioned population of a closely related species,the wild and unprovisioned population exam­ined(i)showed stronger age effects,while(ii)female reproductive success was equally affected by *** comparative studies are needed to examine whether captive or provisioned populations deviate predictably from wild populations.