Male dispersal patterns in white-faced capuchins, Cebus capucinus: Part 1: patterns and causes of natal emigration |
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Authors: | Katharine M Jack Linda Fedigan |
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Institution: | * Department of Anthropology, University of Alberta, USA † Department of Anthropology, University of Calgary, Canada |
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Abstract: | This is the first of two papers examining male dispersal patterns in white-faced capuchins. Our study was based on behavioural and demographic data collected on multiple groups of white-faced capuchins in Santa Rosa National Park, Costa Rica since 1985. Here we examine the patterns and proximate causation of male natal dispersal. Natal dispersal in white-faced capuchins occurred at a median age of 4.5 years, with no males remaining in the natal group past 8 years. Initial departure from the natal group appeared to be in response to an attraction to extragroup males and dispersing groupmates. Rates of parallel dispersal (dispersal with co-resident males and/or into groups containing familiar males) were very high for natal males (71-82%), and this pattern of dispersal may have evolved to increase inclusive fitness benefits in male-dispersed species. Additionally, this pattern of dispersal probably increases survivorship among dispersing males who are not yet physically mature, as is common in white-faced capuchins. |
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