Xia Wancai, Grueter Cyril C, Ren Baoping, Zhang Dejun, Yuan Xiaoxia, Li Dayong
Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637009, China.
Institute of Rare Animals and Plants, China West Normal University, Nanchong 637009, China.
Animals (Basel). 2021 Oct 9;11(10):2915. doi: 10.3390/ani11102915.
We used long-term data on the variation in harem size in Yunnan snub-nosed monkeys to research the effects of harem size on reproductive success and the ratio of grooming received to given (RGRG). The results suggest that harem holders derive reproductive benefits commensurate with harem size, whereas the females' reproductive success is unaffected by harem size. Males of larger harems groomed less and had higher RGRG than males of smaller harems. In the case of females, grooming given increased, and RGRG decreased with an increase in harem size. The males' reproductive success seems to be a driver of harem size maximization. From the females' perspective, dwindling social benefits appear to set the upper limit for harem enlargement. We also showed that males of monogamous units ('single-female harems') invested more into grooming their female, presumably to prevent unit disintegration and loss of mating privileges.
我们利用滇金丝猴后宫规模变化的长期数据，研究后宫规模对繁殖成功率以及接受与给予的梳理比例（RGRG）的影响。结果表明，后宫之主获得的繁殖益处与后宫规模相称，而雌性的繁殖成功率不受后宫规模影响。较大后宫中的雄性梳理行为较少，且其RGRG高于较小后宫中的雄性。就雌性而言，随着后宫规模的增加，给予的梳理行为增多，而RGRG降低。雄性的繁殖成功率似乎是后宫规模最大化的驱动因素。从雌性的角度来看，不断减少的社会益处似乎为后宫扩大设定了上限。我们还表明，一夫一妻制单元（“单雌后宫”）中的雄性在梳理其雌性方面投入更多，大概是为了防止单元解体和交配特权的丧失。
