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Auteur (up) Viblanc, V.A.; Saraux, C.; Murie, J.O.; Dobson, F.S. doi  openurl
  Titre Kin effects on energy allocation in group-living ground squirrels Type Article scientifique
  Année 2016 Publication Revue Abrégée J. Anim. Ecol.  
  Volume 85 Numéro 5 Pages 1361-1369  
  Mots-Clés empirical-evidence; energy; history trade-offs; kin selection; lactating females; life-history; life-history trade-offs; litter size; maternal investment; matriline; philopatry; reproductive allocation; reproductive success; somatic allocation; spermophilus-columbianus; urocitellus-columbianus; yellow-bellied marmots  
  Résumé 1. The social environment has potent effects on individual phenotype and fitness in group-living species. 2. We asked whether the presence of kin might act on energy allocation, a central aspect of life-history variation. 3. Using a 22-year data set on reproductive and somatic allocations in Columbian ground squirrels (Urocitellus columbianus), we tested the effects of co-breeding and non-breeding kin on the fitness and energy allocation balance between reproduction and personal body condition of individual females. 4. Greater numbers of co-breeding kin had a positive effect on the number of offspring weaned, through the mechanism of altering energy allocation patterns. On average, females with higher numbers of co-breeding kin did not increase energy income but biased energy allocation towards reproduction. 5. Co-breeding female kin ground squirrels maintain close nest burrows, likely providing a social buffer against territorial invasions from non-kin ground squirrels. Lower aggressiveness, lower risks of infanticide from female kin and greater protection of territorial boundaries may allow individual females to derive net fitness benefits via their energy allocation strategies. 6. We demonstrated the importance of kin effects on a fundamental life-history trade-off.  
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  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0021-8790 ISBN Médium  
  Région Expédition Conférence  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 1699  
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