Postdispersal nepotism in male long-tailed macaques (Macaca fascicularis)

Ecology and Evolution
Livia GerberMaria A van Noordwijk

Abstract

Cooperative behaviors are promoted by kin selection if the costs to the actor are smaller than the fitness benefits to the recipient, weighted by the coefficient of relatedness. In primates, cooperation occurs primarily among female dyads. Due to male dispersal before sexual maturity in many primate species, however, it is unknown whether there are sufficient opportunities for selective tolerance and occasional coalitionary support for kin selection to favor male nepotistic support. We studied the effect of the presence of male kin on correlates of male reproductive success (residence time, duration of high dominance rank) in non-natal male long-tailed macaques (Macaca fascicularis). We found that "related" (i.e., related at the half-sibling level or higher) males in a group have a significantly higher probability to remain in the non-natal group compared to males without relatives. Moreover, males stayed longer in a group when a relative was present at group entry or joined the same group within 3 months upon arrival. Males with co-residing relatives also maintained a high rank for longer than those without. To our knowledge, this is the first demonstration of a potential nepotistic effect on residence and rank maintenance amo...Continue Reading

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Citations

Aug 19, 2016·Scientific Reports·Pascal R MartyAntje Engelhardt
Jul 21, 2020·Molecular Ecology·Delphine De MoorOliver Schülke
Jun 27, 2019·American Journal of Primatology·Lauren J WooddellAmanda M Dettmer

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Methods Mentioned

BETA
PCR
genotyping

Software Mentioned

kininfor
Genepop
coxme
lme4
R
DyadML
coancestry
cervus

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