The further from the equator, the fewer predators?
For many years, it was generally accepted by biologists that shorebirds decrease the chances of losing their clutch to a predator, by locating their nest further away from the equator.This could explain why so many shorebirds make the annual effort of long-distance migratory flights to the northern tundra to lay their eggs. A publication in Science in 2018 gave a remarkable twist to that long-standing idea and claimed the opposite. Now, Bulla and colleagues show that there is little support for the long-standing hypothesis, but also that the opposite conclusions are untenable and likely a methodological artifact.
Author - Martin - Bulla - Colleagues - Results
First author Martin Bulla and his colleagues scrutinize the results, methods and data published the previous year in Science, to understand whether nest predation has indeed changed over the past 60 years across the globe and whether predation rates on nests are now higher in the Arctic than in the tropics. Contrary to the claims, nest predation has changed little over time, and there appears to be...
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