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Kin effects on energy allocation in group-living ground squirrels.
Viblanc, Vincent A; Saraux, Claire; Murie, Jan O; Dobson, F Stephen.
Afiliação
  • Viblanc VA; Institut Pluridisciplinaire Hubert Curien (IPHC), Département Ecologie Physiologie et Ethologie (DEPE), Université de Strasbourg, 23 rue Becquerel, Strasbourg, 67087, France.
  • Saraux C; CNRS, UMR7178, Strasbourg, 67087, France.
  • Murie JO; UMR MARBEC, IFREMER (Institut Français de Recherche pour l'Exploitation de la Mer), Sète, France.
  • Dobson FS; Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada.
J Anim Ecol ; 85(5): 1361-9, 2016 Sep.
Article em En | MEDLINE | ID: mdl-27263469
The social environment has potent effects on individual phenotype and fitness in group-living species. We asked whether the presence of kin might act on energy allocation, a central aspect of life-history variation. 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. 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. 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. We demonstrated the importance of kin effects on a fundamental life-history trade-off.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reprodução / Sciuridae / Territorialidade / Metabolismo Energético Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reprodução / Sciuridae / Territorialidade / Metabolismo Energético Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2016 Tipo de documento: Article