Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

Luis A. Ebensperger, Raúl Sobrero, Verónica Quirici, Rodrigo A. Castro, Liliana Ortiz Tolhuysen, Francisco Vargas, Joseph Robert Burger, R. Quispe, Camila P. Villavicencio, Rodrigo A. Vásquez, Loren D. Hayes

Resultado de la investigación: Article

18 Citas (Scopus)

Resumen

Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality. Intraspecific comparisons of mammalian sociality across populations facing different environmental conditions have not provided a consistent relationship between ecological variation and group-living. Thus, we studied two populations of the communally rearing rodent Octodon degus to determine how co-variation between sociality and ecology supports alternative ecological causes of group living. In particular, we examined how variables linked to predation risk, thermal conditions, burrowing costs, and food availability predicted temporal and population variation in sociality. Our study revealed population and temporal variation in total group size and group composition that covaried with population and yearly differences in ecology. In particular, predation risk and burrowing costs are supported as drivers of this social variation in degus. Thermal differences, food quantity and quality were not significant predictors of social group size. In contrast to between populations, social variation within populations was largely uncoupled from ecological differences.

Idioma originalEnglish
Páginas (desde-hasta)261-274
Número de páginas14
PublicaciónBehavioral Ecology and Sociobiology
Volumen66
N.º2
DOI
EstadoPublished - 1 feb 2012

Huella dactilar

rodent
rearing
rodents
intraspecific variation
group size
burrowing
predation risk
cost
ecology
food availability
trade-off
predation
temporal variation
fitness
heat
environmental conditions
food
Octodon degus
environmental factors

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Citar esto

Ebensperger, Luis A. ; Sobrero, Raúl ; Quirici, Verónica ; Castro, Rodrigo A. ; Tolhuysen, Liliana Ortiz ; Vargas, Francisco ; Burger, Joseph Robert ; Quispe, R. ; Villavicencio, Camila P. ; Vásquez, Rodrigo A. ; Hayes, Loren D. / Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus. En: Behavioral Ecology and Sociobiology. 2012 ; Vol. 66, N.º 2. pp. 261-274.
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abstract = "Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality. Intraspecific comparisons of mammalian sociality across populations facing different environmental conditions have not provided a consistent relationship between ecological variation and group-living. Thus, we studied two populations of the communally rearing rodent Octodon degus to determine how co-variation between sociality and ecology supports alternative ecological causes of group living. In particular, we examined how variables linked to predation risk, thermal conditions, burrowing costs, and food availability predicted temporal and population variation in sociality. Our study revealed population and temporal variation in total group size and group composition that covaried with population and yearly differences in ecology. In particular, predation risk and burrowing costs are supported as drivers of this social variation in degus. Thermal differences, food quantity and quality were not significant predictors of social group size. In contrast to between populations, social variation within populations was largely uncoupled from ecological differences.",
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Ebensperger, LA, Sobrero, R, Quirici, V, Castro, RA, Tolhuysen, LO, Vargas, F, Burger, JR, Quispe, R, Villavicencio, CP, Vásquez, RA & Hayes, LD 2012, 'Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus', Behavioral Ecology and Sociobiology, vol. 66, n.º 2, pp. 261-274. https://doi.org/10.1007/s00265-011-1274-3

Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus. / Ebensperger, Luis A.; Sobrero, Raúl; Quirici, Verónica; Castro, Rodrigo A.; Tolhuysen, Liliana Ortiz; Vargas, Francisco; Burger, Joseph Robert; Quispe, R.; Villavicencio, Camila P.; Vásquez, Rodrigo A.; Hayes, Loren D.

En: Behavioral Ecology and Sociobiology, Vol. 66, N.º 2, 01.02.2012, p. 261-274.

Resultado de la investigación: Article

TY - JOUR

T1 - Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

AU - Ebensperger, Luis A.

AU - Sobrero, Raúl

AU - Quirici, Verónica

AU - Castro, Rodrigo A.

AU - Tolhuysen, Liliana Ortiz

AU - Vargas, Francisco

AU - Burger, Joseph Robert

AU - Quispe, R.

AU - Villavicencio, Camila P.

AU - Vásquez, Rodrigo A.

AU - Hayes, Loren D.

PY - 2012/2/1

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N2 - Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality. Intraspecific comparisons of mammalian sociality across populations facing different environmental conditions have not provided a consistent relationship between ecological variation and group-living. Thus, we studied two populations of the communally rearing rodent Octodon degus to determine how co-variation between sociality and ecology supports alternative ecological causes of group living. In particular, we examined how variables linked to predation risk, thermal conditions, burrowing costs, and food availability predicted temporal and population variation in sociality. Our study revealed population and temporal variation in total group size and group composition that covaried with population and yearly differences in ecology. In particular, predation risk and burrowing costs are supported as drivers of this social variation in degus. Thermal differences, food quantity and quality were not significant predictors of social group size. In contrast to between populations, social variation within populations was largely uncoupled from ecological differences.

AB - Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality. Intraspecific comparisons of mammalian sociality across populations facing different environmental conditions have not provided a consistent relationship between ecological variation and group-living. Thus, we studied two populations of the communally rearing rodent Octodon degus to determine how co-variation between sociality and ecology supports alternative ecological causes of group living. In particular, we examined how variables linked to predation risk, thermal conditions, burrowing costs, and food availability predicted temporal and population variation in sociality. Our study revealed population and temporal variation in total group size and group composition that covaried with population and yearly differences in ecology. In particular, predation risk and burrowing costs are supported as drivers of this social variation in degus. Thermal differences, food quantity and quality were not significant predictors of social group size. In contrast to between populations, social variation within populations was largely uncoupled from ecological differences.

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