Nest association between two predators as a behavioral response to the low density of rodents
| Autor: | Rolf A. Ims, Aleksandr Sokolov, Nigel G. Yoccoz, Ivan Pokrovsky, Vasiliy Sokolov, Natalia Sokolova, Ivan A. Fufachev, Olga Kulikova, Dorothee Ehrich |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488
0106 biological sciences Reproductive success 010604 marine biology & hydrobiology Foraging Zoology Buteo Biology Bird nest biology.organism_classification 010603 evolutionary biology 01 natural sciences Predation VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 Nest Lagopus Population cycle Animal Science and Zoology Ecology Evolution Behavior and Systematics |
| Zdroj: | The Auk. 137 |
| ISSN: | 1938-4254 0004-8038 |
| Popis: | This is a pre-copyedited, author-produced version of an article accepted for publication in The Auk following peer review. The version of record, Pokrovsky, I.G., Ehrich, D., Fufachev, I.A., Ims, R.A., Kulikova, O., Sokolov, A., ... Yoccoz, N.G. (2020). Nest association between two predators as a behavioral response to the low density of rodents. The AUK, 137(1), ukz060, is available online at: https://doi.org/10.1093/auk/ukz060. Many birds nest in association with aggressive birds of other species to benefit from their protection against predators. We hypothesized that the protective effect also could extend to foraging resources, whereby the resultant resource-enriched habitats near a nest of aggressive raptors could be an alternative cause of associations between nesting bird species with non-overlapping foraging niches. In the Arctic, the Rough-legged Hawk (Buteo lagopus) and the Peregrine Falcon (Falco peregrinus) are 2 raptor species with non-overlapping food resources that have been reported to nest sometimes in close proximity. Since nesting Peregrine Falcons are very aggressive, they may protect the small rodent prey near their nests from predation, and Rough-legged Hawks could use these hot spots as a nesting territory. In 2 regions in low Arctic Russia we found that (1) the nesting territories of Peregrine Falcons were indeed enriched with small rodents as compared to control areas, (2) the probability of nest association between the 2 raptors increased when rodent abundance was generally low in the region where hawks did not use alternative prey, and (3) hawk reproductive success increased when nesting close to Peregrine Falcons. These results suggest that implications of aggressive nest site defense in birds in certain cases may involve more mechanisms than previously explored. A key ecological process in tundra, rodent population cycles, may explain the occurrence and adaptive significance of a specific behavior pattern, the nesting association between 2 raptor species. |
| Databáze: | OpenAIRE |
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