Females facilitate male food patch discovery in a wild fish population.

Autor: Snijders L; Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany.; Department of Evolutionary Ecology, Leibniz-Institute of Zoo and Wildlife Research, Berlin, Germany., Kurvers RHJM; Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany.; Center for Adaptive Rationality, Max Planck Institute for Human Development, Berlin, Germany., Krause S; Department of Electrical Engineering and Computer Science, Lübeck University of Applied Sciences, Lübeck, Germany., Tump AN; Center for Adaptive Rationality, Max Planck Institute for Human Development, Berlin, Germany., Ramnarine IW; Department of Life Sciences, University of the West Indies, St Augustine, Trinidad and Tobago., Krause J; Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany.; Faculty of Life Sciences, Humboldt-Universitӓt zu Berlin, Berlin, Germany.
Jazyk: angličtina
Zdroj: The Journal of animal ecology [J Anim Ecol] 2019 Dec; Vol. 88 (12), pp. 1950-1960. Date of Electronic Publication: 2019 Sep 09.
DOI: 10.1111/1365-2656.13086
Abstrakt: Responding to the information provided by others is an important foraging strategy in many species. Through social foraging, individuals can more efficiently find unpredictable resources and thereby increase their foraging success. When individuals are more socially responsive to particular phenotypes than others, however, the advantage they obtain from foraging socially is likely to depend on the phenotype composition of the social environment. We tested this hypothesis by performing experimental manipulations of guppy, Poecilia reticulata, sex compositions in the wild. Males found fewer novel food patches in the absence of females than in mixed-sex compositions, while female patch discovery did not differ regardless of the presence or absence of males. We argue that these results were driven by sex-dependent mechanisms of social association: Markov chain-based fission-fusion modelling revealed that less social individuals found fewer patches and that males reduced sociality when females were absent. In contrast, females were similarly social with or without males. Our findings highlight the relevance of considering how individual- and population-level traits interact in shaping the advantages of social foraging in the wild.
(© 2019 The Authors. Journal of Animal Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.)
Databáze: MEDLINE
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