Dominance relationships in male Nepal gray langurs (Semnopithecus schistaceus)

American Journal of Physical Anthropology
Rachel F PerlmanAndreas Koenig

Abstract

Reproductive skew is proposed to link to despotism in dominance hierarchies. While studies illustrating male skew are plentiful, demonstrating the link to despotism is rare. Likewise, it is often unknown which factors (e.g., resource holding potential, age, physical condition) affect a male's dominance rank. Here we investigated correlates of male rank and hierarchy characteristics in Nepal gray langurs (Semnopithecus schistaceus), a population with high male reproductive skew, and compared the results to other multi-male groups of nonhuman primates. We collected dyadic displacement interactions from two groups (mean 3.0 and 4.1 adult males) for five years each. We assessed dominance ranks for demographically stable phases (n = 11, n = 28) and analyzed the effects of age and physical condition through linear mixed models (LMM). We analyzed hierarchy characteristics via the program MatMan. We used data from 27 primate groups (cercopithecines, colobines, hominoids) as a comparative sample. The highest ranks were attained by adults in one group (LMM, P < 0.091) and by young adults in the other group (LMM, P < 0.001). With some exceptions, rank was highest for males with higher physical condition scores (LMM, P < 0.05). Hierarchies...Continue Reading

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Citations

Apr 10, 2016·Integrative Zoology·Dorien DE VriesCarola Borries
Mar 15, 2020·Current Biology : CB·Joan B SilkShirley C Strum

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