Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus
Density‐dependent mortality in wintering shorebirds is critical to shorebird population dynamics, but is difficult to study and demonstrate. Most winter mortality of small shorebirds probably results from predation by raptors. Over 13 winters, I studied Eurasian Sparrowhawk Accipiter nisus predation...
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crwiley:10.1046/j.1474-919x.2003.00183.x 2024-06-02T08:04:45+00:00 Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus Whitfield, D. Philip 2003 http://dx.doi.org/10.1046/j.1474-919x.2003.00183.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1474-919X.2003.00183.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1474-919X.2003.00183.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 145, issue 3, page 432-438 ISSN 0019-1019 1474-919X journal-article 2003 crwiley https://doi.org/10.1046/j.1474-919x.2003.00183.x 2024-05-03T11:47:44Z Density‐dependent mortality in wintering shorebirds is critical to shorebird population dynamics, but is difficult to study and demonstrate. Most winter mortality of small shorebirds probably results from predation by raptors. Over 13 winters, I studied Eurasian Sparrowhawk Accipiter nisus predation on wintering Dunlins Calidris alpina at a rocky shore in south‐east Scotland, a site apparently of marginal suitability for wintering Dunlins. Most Dunlins on the study site were juveniles (first winter birds), and winter juvenile mortality rate due to Sparrowhawk predation was strongly and positively related to Dunlin density (maximum winter count). There was no indication of any marked effect of weather on Dunlin winter mortality rate, except that mortality was slightly greater in winters with lower temperatures. Dunlin mortality was unrelated to the mortality through Sparrowhawk predation of a preferred prey, the Redshank Tringa totanus , or to sighting rates of hawks, suggesting that increased hunting of Redshanks by hawks or a numerical response by hawks were not involved in density‐dependent mortality of Dunlins. Article in Journal/Newspaper Calidris alpina Dunlin Wiley Online Library Ibis 145 3 432 438 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Density‐dependent mortality in wintering shorebirds is critical to shorebird population dynamics, but is difficult to study and demonstrate. Most winter mortality of small shorebirds probably results from predation by raptors. Over 13 winters, I studied Eurasian Sparrowhawk Accipiter nisus predation on wintering Dunlins Calidris alpina at a rocky shore in south‐east Scotland, a site apparently of marginal suitability for wintering Dunlins. Most Dunlins on the study site were juveniles (first winter birds), and winter juvenile mortality rate due to Sparrowhawk predation was strongly and positively related to Dunlin density (maximum winter count). There was no indication of any marked effect of weather on Dunlin winter mortality rate, except that mortality was slightly greater in winters with lower temperatures. Dunlin mortality was unrelated to the mortality through Sparrowhawk predation of a preferred prey, the Redshank Tringa totanus , or to sighting rates of hawks, suggesting that increased hunting of Redshanks by hawks or a numerical response by hawks were not involved in density‐dependent mortality of Dunlins. |
format |
Article in Journal/Newspaper |
author |
Whitfield, D. Philip |
spellingShingle |
Whitfield, D. Philip Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
author_facet |
Whitfield, D. Philip |
author_sort |
Whitfield, D. Philip |
title |
Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
title_short |
Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
title_full |
Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
title_fullStr |
Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
title_full_unstemmed |
Density‐dependent mortality of wintering Dunlins Calidris alpina through predation by Eurasian Sparrowhawks Accipiter nisus |
title_sort |
density‐dependent mortality of wintering dunlins calidris alpina through predation by eurasian sparrowhawks accipiter nisus |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1046/j.1474-919x.2003.00183.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1474-919X.2003.00183.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1474-919X.2003.00183.x |
genre |
Calidris alpina Dunlin |
genre_facet |
Calidris alpina Dunlin |
op_source |
Ibis volume 145, issue 3, page 432-438 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1474-919x.2003.00183.x |
container_title |
Ibis |
container_volume |
145 |
container_issue |
3 |
container_start_page |
432 |
op_container_end_page |
438 |
_version_ |
1800749389820461056 |