Authors
Raymond HG Klaassen, Mikael Hake, Roine Strandberg, Ben J Koks, Christiane Trierweiler, Klaus‐Michael Exo, Franz Bairlein, Thomas Alerstam
Publication date
2014/1
Journal
Journal of Animal Ecology
Volume
83
Issue
1
Pages
176-184
Description
- Information about when and where animals die is important to understand population regulation. In migratory animals, mortality might occur not only during the stationary periods (e.g. breeding and wintering) but also during the migration seasons. However, the relative importance of population limiting factors during different periods of the year remains poorly understood, and previous studies mainly relied on indirect evidence.
- Here, we provide direct evidence about when and where migrants die by identifying cases of confirmed and probable deaths in three species of long‐distance migratory raptors tracked by satellite telemetry.
- We show that mortality rate was about six times higher during migration seasons than during stationary periods. However, total mortality was surprisingly similar between periods, which can be explained by the fact that risky migration periods are shorter than safer stationary periods …
Scholar articles
RHG Klaassen, M Hake, R Strandberg, BJ Koks… - Journal of Animal Ecology, 2014