A comparison of Goshawk summer diet in three areas with different breeding density in western Norway
In Norway, Goshawk Accipiter gentilis populations have declined in continuously forested areas in the inland, possibly because of decreased populations of grouse. The highest breeding densities are now found in landscapes dominated by farmland and urban areas, and in some areas close to the coast. I...
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Language: | Norwegian English |
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BirdLife Norway
2010
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Online Access: | https://boap.uib.no/index.php/ornis/article/view/152 https://doi.org/10.15845/on.v33i0.152 |
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ftboapojs:oai:boap.uib.no:article/152 2023-05-15T13:00:35+02:00 A comparison of Goshawk summer diet in three areas with different breeding density in western Norway Verdal, Turid Selås, Vidar 2010-01-01 application/pdf https://boap.uib.no/index.php/ornis/article/view/152 https://doi.org/10.15845/on.v33i0.152 nor eng nor eng BirdLife Norway https://boap.uib.no/index.php/ornis/article/view/152/122 https://boap.uib.no/index.php/ornis/article/view/152/123 https://boap.uib.no/index.php/ornis/article/view/152 doi:10.15845/on.v33i0.152 Ornis Norvegica; Årg 33 (2010); 110-117 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2010 ftboapojs https://doi.org/10.15845/on.v33i0.152 2021-11-03T23:34:19Z In Norway, Goshawk Accipiter gentilis populations have declined in continuously forested areas in the inland, possibly because of decreased populations of grouse. The highest breeding densities are now found in landscapes dominated by farmland and urban areas, and in some areas close to the coast. In western Norway, we have compared the summer diet of Goshawks breeding at high densities in one island area and one urban area with that of Goshawks breeding at lower densities in an inland area at higher altitudes, approximately 90 km from the coast. Birds dominated the diet in all areas, but the diet diversity was lower in the inland than in the two other areas. The number of pigeons, Woodcock Scolopax rusticola and ducks/waders found at nest sites decreased with altitude, whereas the number of grouse increased. We conclude that Goshawks in the inland are more dependent on grouse because of lower availability of alternative prey. Article in Journal/Newspaper Accipiter gentilis Bergen Open Access Publishing (University of Bergen Library) Norway Woodcock ENVELOPE(-128.237,-128.237,55.066,55.066) Ornis Norvegica 33 0 110 |
institution |
Open Polar |
collection |
Bergen Open Access Publishing (University of Bergen Library) |
op_collection_id |
ftboapojs |
language |
Norwegian English |
description |
In Norway, Goshawk Accipiter gentilis populations have declined in continuously forested areas in the inland, possibly because of decreased populations of grouse. The highest breeding densities are now found in landscapes dominated by farmland and urban areas, and in some areas close to the coast. In western Norway, we have compared the summer diet of Goshawks breeding at high densities in one island area and one urban area with that of Goshawks breeding at lower densities in an inland area at higher altitudes, approximately 90 km from the coast. Birds dominated the diet in all areas, but the diet diversity was lower in the inland than in the two other areas. The number of pigeons, Woodcock Scolopax rusticola and ducks/waders found at nest sites decreased with altitude, whereas the number of grouse increased. We conclude that Goshawks in the inland are more dependent on grouse because of lower availability of alternative prey. |
format |
Article in Journal/Newspaper |
author |
Verdal, Turid Selås, Vidar |
spellingShingle |
Verdal, Turid Selås, Vidar A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
author_facet |
Verdal, Turid Selås, Vidar |
author_sort |
Verdal, Turid |
title |
A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
title_short |
A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
title_full |
A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
title_fullStr |
A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
title_full_unstemmed |
A comparison of Goshawk summer diet in three areas with different breeding density in western Norway |
title_sort |
comparison of goshawk summer diet in three areas with different breeding density in western norway |
publisher |
BirdLife Norway |
publishDate |
2010 |
url |
https://boap.uib.no/index.php/ornis/article/view/152 https://doi.org/10.15845/on.v33i0.152 |
long_lat |
ENVELOPE(-128.237,-128.237,55.066,55.066) |
geographic |
Norway Woodcock |
geographic_facet |
Norway Woodcock |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
Ornis Norvegica; Årg 33 (2010); 110-117 |
op_relation |
https://boap.uib.no/index.php/ornis/article/view/152/122 https://boap.uib.no/index.php/ornis/article/view/152/123 https://boap.uib.no/index.php/ornis/article/view/152 doi:10.15845/on.v33i0.152 |
op_doi |
https://doi.org/10.15845/on.v33i0.152 |
container_title |
Ornis Norvegica |
container_volume |
33 |
container_issue |
0 |
container_start_page |
110 |
_version_ |
1766254763322638336 |