%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Courbin, N.
%A Besnard, A.
%A Peron, Clara
%A Saraux, C.
%A Fort, J.
%A Perret, S.
%A Tornos, J.
%A Gremillet, D.
%T Short-term prey field lability constrains individual specialisation in resource selection and foraging site fidelity in a marine predator
%D 2018
%L fdi:010073132
%G ENG
%J Ecology Letters
%@ 1461-023X
%K Behavioural consistency ; Calonectris diomedea ; foraging site fidelity ; resource selection ; Scopoli's shearwater ; temporal resource dynamic ; Western Mediterranean
%K MEDITERRANEE OUEST ; MARSEILLE ; RIOU ILE ; FRIOUL ILE
%M ISI:000435270600010
%N 7
%P 1043-1054
%R 10.1111/ele.12970
%U https://www.documentation.ird.fr/hor/fdi:010073132
%> https://www.documentation.ird.fr/intranet/publi/2018/07/010073132.pdf
%V 21
%W Horizon (IRD)
%X Spatio-temporally stable prey distributions coupled with individual foraging site fidelity are predicted to favour individual resource specialisation. Conversely, predators coping with dynamic prey distributions should diversify their individual diet and/or shift foraging areas to increase net intake. We studied individual specialisation in Scopoli's shearwaters (Calonectris diomedea) from the highly dynamic Western Mediterranean, using daily prey distributions together with resource selection, site fidelity and trophic-level analyses. As hypothesised, we found dietary diversification, low foraging site fidelity and almost no individual specialisation in resource selection. Crucially, shearwaters switched daily foraging tactics, selecting areas with contrasting prey of varying trophic levels. Overall, information use and plastic resource selection of individuals with reduced short-term foraging site fidelity allow predators to overcome prey field lability. Our study is an essential step towards a better understanding of individual responses to enhanced environmental stochasticity driven by global changes, and of pathways favouring population persistence.
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