The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway
To assess the importance of semi-domesticated reindeer Rangifer tarandus calves in the diet of Golden Eagles Aquila chrysaetos, in Finnmark (northern Norway), we collected prey remains at 37 nests over six years (2001-2006). The study area was divided into 1) a fjord area, which is an important calv...
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fttsvojs:oai:journal.fi:article/133687 2023-09-05T13:19:25+02:00 The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway Johnsen, T. V. Systad, G. H. Jacobsen, K. O. Nygård, T. Bustnes, J. O. 2007-09-30 application/pdf https://ornisfennica.journal.fi/article/view/133687 eng eng BirdLife Finland https://ornisfennica.journal.fi/article/view/133687/82233 https://ornisfennica.journal.fi/article/view/133687 Ornis Fennica; Vol 84 Nro 3 (2007); 112–118 Ornis Fennica; Vol. 84 No. 3 (2007); 112–118 0030-5685 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2007 fttsvojs 2023-08-23T23:03:02Z To assess the importance of semi-domesticated reindeer Rangifer tarandus calves in the diet of Golden Eagles Aquila chrysaetos, in Finnmark (northern Norway), we collected prey remains at 37 nests over six years (2001-2006). The study area was divided into 1) a fjord area, which is an important calving area for reindeer, and 2) an inland area where few reindeer give birth. 469 prey items were collected over the years. The diet of eagles was numerically dominated by birds (73% of collected prey items), especially willow/rock ptarmigan Lagopus spp. (51%), while mammals made up 27%, with mountain hare Lepus timidus as the most common species. Remains of reindeer calves were found in half of the nests studied and made up 8.5% of the collected prey items: 13.2% in the fjord area and 6.5% in the inland area. There was a higher chance of finding reindeer calves at nests in the fjord area than inland, and in nests situated in birch forest than in pine forest. The number of reindeer calves in the Golden Eagle diet in Finnmark corroborates well other studies from northern Fermoscandia. The importance of the Golden Eagle as a predator on reindeer can't, however, be assessed here. Article in Journal/Newspaper Finnmark Lepus timidus mountain hare Northern Norway Rangifer tarandus rock ptarmigan Aquila chrysaetos Finnmark golden eagle Federation of Finnish Learned Societies: Scientific Journals Online Norway |
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Open Polar |
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Federation of Finnish Learned Societies: Scientific Journals Online |
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fttsvojs |
language |
English |
description |
To assess the importance of semi-domesticated reindeer Rangifer tarandus calves in the diet of Golden Eagles Aquila chrysaetos, in Finnmark (northern Norway), we collected prey remains at 37 nests over six years (2001-2006). The study area was divided into 1) a fjord area, which is an important calving area for reindeer, and 2) an inland area where few reindeer give birth. 469 prey items were collected over the years. The diet of eagles was numerically dominated by birds (73% of collected prey items), especially willow/rock ptarmigan Lagopus spp. (51%), while mammals made up 27%, with mountain hare Lepus timidus as the most common species. Remains of reindeer calves were found in half of the nests studied and made up 8.5% of the collected prey items: 13.2% in the fjord area and 6.5% in the inland area. There was a higher chance of finding reindeer calves at nests in the fjord area than inland, and in nests situated in birch forest than in pine forest. The number of reindeer calves in the Golden Eagle diet in Finnmark corroborates well other studies from northern Fermoscandia. The importance of the Golden Eagle as a predator on reindeer can't, however, be assessed here. |
format |
Article in Journal/Newspaper |
author |
Johnsen, T. V. Systad, G. H. Jacobsen, K. O. Nygård, T. Bustnes, J. O. |
spellingShingle |
Johnsen, T. V. Systad, G. H. Jacobsen, K. O. Nygård, T. Bustnes, J. O. The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
author_facet |
Johnsen, T. V. Systad, G. H. Jacobsen, K. O. Nygård, T. Bustnes, J. O. |
author_sort |
Johnsen, T. V. |
title |
The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
title_short |
The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
title_full |
The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
title_fullStr |
The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
title_full_unstemmed |
The occurrence of reindeer calves in the diet of nesting Golden Eagles in Finnmark, northern Norway |
title_sort |
occurrence of reindeer calves in the diet of nesting golden eagles in finnmark, northern norway |
publisher |
BirdLife Finland |
publishDate |
2007 |
url |
https://ornisfennica.journal.fi/article/view/133687 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Finnmark Lepus timidus mountain hare Northern Norway Rangifer tarandus rock ptarmigan Aquila chrysaetos Finnmark golden eagle |
genre_facet |
Finnmark Lepus timidus mountain hare Northern Norway Rangifer tarandus rock ptarmigan Aquila chrysaetos Finnmark golden eagle |
op_source |
Ornis Fennica; Vol 84 Nro 3 (2007); 112–118 Ornis Fennica; Vol. 84 No. 3 (2007); 112–118 0030-5685 |
op_relation |
https://ornisfennica.journal.fi/article/view/133687/82233 https://ornisfennica.journal.fi/article/view/133687 |
_version_ |
1776200189244080128 |