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- Title
Predation on birds' nests in relation to antipredator aggression and nest density: an experimental study.
- Authors
Göransson, G.; Karlsson, J.; Nilsson, S. G.; Ulfstrand, S.
- Abstract
Artificial birds' nests containing 2 eggs were placed in 5 study plots (area 4 ha) at densities of 1 to 4 nests ha-1 and exposed for short periods (1-3 days) to predation, mainly by Corvus corone cornix L. and Lotus argentatus Pont. Predation rates were high (75 to 96% on average in 6 experiments) and positively correlated with nest density in 4 plots. In the fifth plot, individuals of Vanellus vanellus L. and, to a lesser extent, Nitmenius arquata L. were present and defended their ranges against predators. A significantly lower frequency of predators over this study plot than the others was recorded, and the rate of predation (26 %) on the artificial nests in this plot was also significantly lower. The importance of this result for some current hypotheses about the role of predation in bird communities is pointed out.
- Subjects
PREDATION; BIRD nests; PREDATORY animals; EGGS; HYPOTHESIS; COMMUNITIES
- Publication
Oikos, 1975, Vol 26, Issue 2, p117
- ISSN
0030-1299
- Publication type
Article