Grouped sequential exploitation of food patches in a flock feeder,the feral pigeon |
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Authors: | Diane Perusse Louis Lefebvre |
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Institution: | Department of Biology, McGill University 1205, av. Docteur Penfield, Montréal H3A 1B1 Québec, Canada |
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Abstract: | Feral and laboratory flocks of rock doves () show a pattern of grouped sequential exploitation when simultaneously presented with two dispersed, depleting patches of seed. This behavior contrasts with the ideal free distribution pattern shown when patches are small and concentrated. Grouped sequential exploitation consists of two phases: all pigeons first land together and feed at one patch, then leave one by one for the other patch. Departure times of individuals for the second patch are correlated with feeding rate at patch 1, which is in turn correlated with position in the dominance hierarchy. The decision to switch from patch 1 to patch 2 improves individual feeding rates in all cases, but is done slightly later than it should according to optimal foraging theory. |
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Keywords: | Present address: Laboratoire de Primatologie Pavillon Logan Université de Montréal C P 6128 Succ “A” Montréal Québec Canada H3C 3J7 |
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