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Migratory and resident waders differ in risk taking on the wintering grounds

P. Mikula, M. Díaz, AP. Møller, T. Albrecht, P. Tryjanowski, M. Hromada,

. 2018 ; 157 (-) : 309-314. [pub] 20180806

Language English Country Netherlands

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc19012485

Animals, including birds, have to optimize their escape strategies under the risk of predation. Level of risk-taking is often estimated as flight initiation distance (FID), which is assumed to reflect the trade-off between costs of escape and benefits of staying put. Despite costs and benefits of escape may change during the season, previous studies have focused mainly on breeding bird populations. Here, we focused on risk taking in migratory and resident populations of waders (Charadriiformes) at the wintering grounds in tropical Africa. Phylogenetically informed comparative analyses revealed significant correlation between starting distance, body mass and, marginally, reproductive effort and FID, but no correlation between flock size and FID in wintering waders. Interestingly, despite no differences in body mass, reproductive effort and flock size, FID significantly differed between migratory and resident wader species after controlling for the potential effect of confounding variables, with FID being shorter in resident species. This suggests that such differences in risk perception are linked to some other factors as, for instance, the level of familiarity of waders with local environments at their wintering grounds and previous experience with humans. Our results may have also implications for avian conservation of migratory species at wintering grounds.

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$a Mikula, Peter $u Department of Zoology, Faculty of Science, Charles University, Viničná 7, 128 43, Praha 2, Czech Republic. Electronic address: petomikula158@gmail.com.
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$a Animals, including birds, have to optimize their escape strategies under the risk of predation. Level of risk-taking is often estimated as flight initiation distance (FID), which is assumed to reflect the trade-off between costs of escape and benefits of staying put. Despite costs and benefits of escape may change during the season, previous studies have focused mainly on breeding bird populations. Here, we focused on risk taking in migratory and resident populations of waders (Charadriiformes) at the wintering grounds in tropical Africa. Phylogenetically informed comparative analyses revealed significant correlation between starting distance, body mass and, marginally, reproductive effort and FID, but no correlation between flock size and FID in wintering waders. Interestingly, despite no differences in body mass, reproductive effort and flock size, FID significantly differed between migratory and resident wader species after controlling for the potential effect of confounding variables, with FID being shorter in resident species. This suggests that such differences in risk perception are linked to some other factors as, for instance, the level of familiarity of waders with local environments at their wintering grounds and previous experience with humans. Our results may have also implications for avian conservation of migratory species at wintering grounds.
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$a Díaz, Mario $u Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales, Madrid, Spain.
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$a Møller, Anders Pape $u Ecologie Systématique Evolution, Université Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Orsay Cedex, France.
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$a Albrecht, Tomáš $u Department of Zoology, Faculty of Science, Charles University, Viničná 7, 128 43, Praha 2, Czech Republic; Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Tryjanowski, Piotr $u Institute of Zoology, Poznań University of Life Sciences, Poznań, Poland.
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$a Hromada, Martin $u Laboratory & Museum of Evolutionary Ecology, Faculty of Humanities and Natural Sciences, University of Presov, Slovakia; Faculty of Biological Sciences, University of Zielona Góra, Poland.
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