Skip to Main content Skip to Navigation
Journal articles

Paternity and Dominance Loss in Male Breeders: The Cost of Helpers in a Cooperatively Breeding Mammal

S. Lardy 1 A. Cohas 1 E. Desouhant 1 M. Tafani 1 Dominique Allainé 1 
1 Evolution, adaptation et comportement
Département écologie évolutive [LBBE]
Abstract : Paternity insurance and dominance tenure length are two important components of male reproductive success, particularly in species where reproduction is highly skewed towards a few individuals. Identifying the factors affecting these two components is crucial to better understand the pattern of variation in reproductive success among males. In social species, the social context (i.e. group size and composition) is likely to influence the ability of males to secure dominance and to monopolize reproduction. Most studies have analyzed the factors affecting paternity insurance and dominance tenure separately. We use a long term data set on Alpine marmots to investigate the effect of the number of subordinate males on both paternity insurance and tenure of dominant males. We show that individuals which are unable to monopolize reproduction in their family groups in the presence of many subordinate males are likely to lose dominance the following year. We also report that dominant males lose body mass in the year they lose both paternity and dominance. Our results suggest that controlling many subordinate males is energetically costly for dominant males, and those unable to support this cost lose the control over both reproduction and dominance. A large number of subordinate males in social groups is therefore costly for dominant males in terms of fitness.
Document type :
Journal articles
Complete list of metadata
Contributor : Stéphane Delmotte Connect in order to contact the contributor
Submitted on : Wednesday, May 16, 2012 - 1:49:42 PM
Last modification on : Wednesday, March 23, 2022 - 2:33:51 PM

Links full text




S. Lardy, A. Cohas, E. Desouhant, M. Tafani, Dominique Allainé. Paternity and Dominance Loss in Male Breeders: The Cost of Helpers in a Cooperatively Breeding Mammal. PLoS ONE, Public Library of Science, 2012, 7, pp.1-6. ⟨10.1371/journal.pone.0029508⟩. ⟨hal-00697997⟩



Record views