Can variation in risk of nest predation explain altitudinal migration in tropical birds?

Oecologia
W Alice Boyle

Abstract

Migration is among the best studied of animal behaviors, yet few empirical studies have tested hypotheses explaining the ultimate causes of these cyclical annual movements. Fretwell's (1980) hypothesis predicts that if nest predation explains why many tropical birds migrate uphill to breed, then predation risk must be negatively associated with elevation. Data from 385 artificial nests spanning 2,740 m of elevation on the Atlantic slope of Costa Rica show an overall decline in predation with increasing elevation. However, nest predation risk was highest at intermediate elevations (500-650 m), not at lowest elevations. The proportion of nests depredated by different types of predators differed among elevations. These results imply that over half of the altitudinal migrant bird species in this region migrate to safer breeding areas than their non-breeding areas, suggesting that variation in nest predation risk could be an important benefit of uphill migrations of many species.

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Citations

Apr 8, 2011·Biology Letters·W Alice BoyleD Ryan Norris
Apr 9, 2010·Proceedings. Biological Sciences·W Alice BoyleChristopher G Guglielmo
May 26, 2012·Conservation Biology : the Journal of the Society for Conservation Biology·Heather A LumpkinMonica G Turner
May 10, 2013·PloS One·Nawang NorbuTshering Tempa
Mar 14, 2013·Biological Reviews of the Cambridge Philosophical Society·Liam P McGuire, W Alice Boyle
Mar 15, 2015·Biological Reviews of the Cambridge Philosophical Society·W Alice BoyleKathy Martin
Apr 8, 2015·PloS One·Rachel L White, Peter M Bennett
Apr 24, 2015·PloS One·David J GreenChristy A Morrissey
Oct 26, 2016·The Journal of Animal Ecology·Priya Balasubramaniam, John T Rotenberry
Jun 8, 2018·Biological Reviews of the Cambridge Philosophical Society·An C HsiungRichard B Chandler
Aug 17, 2010·The Journal of Animal Ecology·Cagan H Sekercioglu
Oct 3, 2018·Ecology and Evolution·Ming LiuSheng-Feng Shen
Apr 11, 2020·Ecology and Evolution·Claudie PageauMatthew W Reudink

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