Early-life behavior, survival, and maternal personality in a wild marsupial.

Autor:	Menário Costa W; Division of Ecology & Evolution, Research School of Biology, Australian National University, Canberra Australian Capital Territory, 2601, Australia., King WJ; Division of Ecology & Evolution, Research School of Biology, Australian National University, Canberra Australian Capital Territory, 2601, Australia.; Département de biologie, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, Québec, J1K 2R1, Canada., Bonnet T; Division of Ecology & Evolution, Research School of Biology, Australian National University, Canberra Australian Capital Territory, 2601, Australia.; French National Centre for Scientific Research, Centre d'Études Biologiques de Chizé, UMR 7372 CNRS-La Rochelle Université, 79360 Villiers en Bois, France., Festa-Bianchet M; Division of Ecology & Evolution, Research School of Biology, Australian National University, Canberra Australian Capital Territory, 2601, Australia.; Département de biologie, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, Québec, J1K 2R1, Canada., Kruuk LEB; Division of Ecology & Evolution, Research School of Biology, Australian National University, Canberra Australian Capital Territory, 2601, Australia.; Institute of Ecology and Evolution, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, UK.
Jazyk:	angličtina
Zdroj:	Behavioral ecology : official journal of the International Society for Behavioral Ecology [Behav Ecol] 2023 Sep 14; Vol. 34 (6), pp. 1002-1012. Date of Electronic Publication: 2023 Sep 14 (Print Publication: 2023).
DOI:	10.1093/beheco/arad070
Abstrakt:	Individual behavior varies for many reasons, but how early in life are such differences apparent, and are they under selection? We investigated variation in early-life behavior in a wild eastern gray kangaroo ( Macropus giganteus ) population, and quantified associations of behavior with early survival. Behavior of young was measured while still in the pouch and as subadults, and survival to weaning was monitored. We found consistent variation between offspring of different mothers in levels of activity at the pouch stage, in flight initiation distance (FID) as subadults, and in subadult survival, indicating similarity between siblings. There was no evidence of covariance between the measures of behavior at the pouch young versus subadult stages, nor of covariance of the early-life behavioral traits with subadult survival. However, there was a strong covariance between FIDs of mothers and those of their offspring tested at different times. Further, of the total repeatability of subadult FID (51.5%), more than half could be attributed to differences between offspring of different mothers. Our results indicate that 1) behavioral variation is apparent at a very early stage of development (still in the pouch in the case of this marsupial); 2) between-mother differences can explain much of the repeatability (or "personality") of juvenile behavior; and 3) mothers and offspring exhibit similar behavioral responses to stimuli. However, 4) we found no evidence of selection via covariance between early-life or maternal behavioral traits and juvenile survival in this wild marsupial. Competing Interests: The authors affirm that they possess no identifiable financial conflicts of interest or personal affiliations that could be perceived as exerting influence over the research presented in this paper. (© The Author(s) 2023. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology.)
Databáze:	MEDLINE
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