The Effects of Dispersal and Reproductive Patterns on the Evolution of Male Sociality in White-Faced Capuchins

Primate life history, social dynamics, ecology, and conservation: Contributions from long‐term research in Área de Conservación Guanacaste, Costa Rica

“…Collectively, these observations of infanticide and male dispersal be- to become an alpha male, and in our dataset consisting of 20 years of genetic and observational data, the most successful male sired over 24 infants (Fedigan & Jack, 2004;Wikberg et al, 2017Wikberg et al, , 2018.…”

“…we have shown that many males emigrate in parallel with other males, often continue to reside with close male kin in their breeding group, and have opportunities to form long social relationships with these related males (Wikberg et al, 2014(Wikberg et al, , 2018. Males dispersing from their natal group often do so with similar-aged paternal half-siblings (Wikberg et al, 2018), and capuchin males join groups containing familiar males more often than expected by chance (Jack, 2003b, Jack & Fedigan, 2004b, see similar findings from the nearby study site of Lomas Barbudal in Perry, 2012).…”

“…Because most alpha male capuchins monopolize reproduction, only about a third of the subordinate males sire any offspring (Wikberg et al, 2017(Wikberg et al, , 2018. However, some subordinate males reside with, and provide coalitionary support to, their alpha male kin and thereby gain inclusive fitness benefits through the alpha male's reproductive success (Jack & Fedigan, 2004b;Wikberg et al, 2014Wikberg et al, , 2017.…”

Group versus population level demographics: An analysis of comparability using long term data on wild white‐faced capuchin monkeys (Cebus capucinus imitator)

“…Female capuchins rarely leave their natal group, reach adulthood at approximately 6–7 years of age (mean age at first birth), and continue to produce offspring until death, with an overall median interbirth interval of 1.93 (standard deviation of 0.8 years; Fedigan, Carnegie, & Jack, ). Males disperse from the natal group at a median age of 4.5 years, often in parallel with other group males (Jack & Fedigan, ; Perry, Godoy, & Lammers, ; Wikberg, Jack, Kawamura, & Fedigan, ). These dispersal events are a dangerous time period, with a high mortality rate for both migrating and resident males (Gros‐Louis, Perry, & Manson, ; Jack & Fedigan, ).…”

“…Entry into a new capuchin group is usually agonistic, and, if successful, often results in the displacement of existing group males and a significant increase in infant mortality from male‐mediated infanticide (Brasington, Wikberg, Kawamura, Fedigan, & Jack, ; Fedigan, ; Fedigan et al, ; Jack & Fedigan, ; Manson, Gros‐Louis, & Perry, ). Male capuchins continue to move between groups throughout their adult life (Wikberg et al, ). Capuchin home ranges typically overlap with neighboring groups, and agonistic encounters are common.…”