Document Detail

Microsatellite DNA suggests that group size affects sex-biased dispersal patterns in red colobus monkeys.
MedLine Citation:
PMID:  23307485     Owner:  NLM     Status:  MEDLINE    
Dispersal is a major life history trait of social organisms influencing the behavioral and genetic structure of their groups. Unfortunately, primate dispersal is difficult to quantify, because of the rarity of these events and our inability to ascertain if individuals dispersed or died when they disappear. Socioecological models have been partially developed to understand the ecological causes of different dispersal systems and their social consequences. However, these models have yielded confusing results when applied to folivores. The folivorous red colobus monkey (Procolobus rufomitratus) in Kibale National Park, Uganda is thought to exhibit female-biased dispersal, although both sexes have been observed to disperse and there remains considerable debate over the selective pressures favoring the transfers of males and females and the causes of variation in the proportion of each sex to leave the natal group. We circumvent this problem by using microsatellite DNA data to investigate the prediction that female dispersal will be more frequent in larger groups as compared to smaller ones. The rationale for this prediction is that red colobus exhibit increased within-group competition in bigger groups, which should favor higher female dispersal rates and ultimately lower female relatedness. Genetic data from two unequally sized neighboring groups of red colobus demonstrate increased female relatedness within the smaller group, suggesting females are less likely to disperse when there is less within-group competition. We suggest that the dispersal system is mediated to some degree by scramble competition and group size. Since red colobus group sizes have increased throughout Kibale by over 50% in the last decade, these changes may have major implications for the genetic structure and ultimately the population viability of this endangered primate.
Michael M Miyamoto; Julie M Allen; Jan F Gogarten; Colin A Chapman
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2013-01-10
Journal Detail:
Title:  American journal of primatology     Volume:  75     ISSN:  1098-2345     ISO Abbreviation:  Am. J. Primatol.     Publication Date:  2013 May 
Date Detail:
Created Date:  2013-03-26     Completed Date:  2013-09-18     Revised Date:  2014-05-07    
Medline Journal Info:
Nlm Unique ID:  8108949     Medline TA:  Am J Primatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  478-90     Citation Subset:  IM    
Copyright Information:
© 2013 Wiley Periodicals, Inc.
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MeSH Terms
Colobus / genetics*,  physiology*
DNA / genetics*
Genetic Variation
Microsatellite Repeats / genetics*
Sex Factors
Grant Support
R01 AI098420/AI/NIAID NIH HHS; TW009237/TW/FIC NIH HHS; //Canadian Institutes of Health Research
Reg. No./Substance:

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