Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway
The carcass use of juveniles, subadults and adults of the two eagle species in Norway, the White-tailed Eagle (Haliaeetus albicilla) and the Golden Eagle (Aquila chrysaetos) was studied in Finnmark, the northernmost county of Norway for two winters, in 2009 and 2010. Artificial carrion was laid out...
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Universitetet i Tromsø
2012
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ftunivtroemsoe:oai:munin.uit.no:10037/4105 2023-05-15T16:13:35+02:00 Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway Pálsdóttir, Elínborg Sædís 2012-02 https://hdl.handle.net/10037/4105 eng eng Universitetet i Tromsø University of Tromsø https://hdl.handle.net/10037/4105 URN:NBN:no-uit_munin_3825 openAccess Copyright 2012 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 White-tailed Eagle Golden Eagle scavenging carcass BIO-3910 Master thesis Mastergradsoppgave 2012 ftunivtroemsoe 2021-06-25T17:53:16Z The carcass use of juveniles, subadults and adults of the two eagle species in Norway, the White-tailed Eagle (Haliaeetus albicilla) and the Golden Eagle (Aquila chrysaetos) was studied in Finnmark, the northernmost county of Norway for two winters, in 2009 and 2010. Artificial carrion was laid out as bait on four peninsulas, along with automatic digital cameras which took picture on 5-15 minutes interval. The pattern of carcass use was evaluated in relation to distance from coast and forest, altitude, peninsula, year and day of the year. Furthermore, I investigated whether there were differences in the time spent scavenging each day. Juvenile eagles of both species and subadult White-tailed Eagles were rare on the carcasses, while subadult Golden Eagles and adults of both species occurred at similar, but overall, rather low frequencies. In general, occupancy on carcass decreases with distance from coast for both species, most clearly so for adult White-tailed Eagles. Subadult Golden Eagles were fairly evenly distributed across the peninsulas. Adult Golden Eagles were more common on the Sværholt and Varanger peninsulas, while adult White-tailed eagles were most common on the Nordkinn and Sværholt peninsulas. I detected no differences between the age groups in time period spent scavenging per day. The intensity of use of the carrion was too low in both eagle species for interference competition for such food resources to be a likely determinant of the spatial and temporal distribution of eagles during the winters in Finnmark. Master Thesis Finnmark Haliaeetus albicilla Varanger White-tailed eagle Aquila chrysaetos Finnmark golden eagle University of Tromsø: Munin Open Research Archive Norway Nordkinn ENVELOPE(27.645,27.645,71.133,71.133) Sværholt ENVELOPE(26.684,26.684,70.962,70.962) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 White-tailed Eagle Golden Eagle scavenging carcass BIO-3910 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 White-tailed Eagle Golden Eagle scavenging carcass BIO-3910 Pálsdóttir, Elínborg Sædís Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 White-tailed Eagle Golden Eagle scavenging carcass BIO-3910 |
description |
The carcass use of juveniles, subadults and adults of the two eagle species in Norway, the White-tailed Eagle (Haliaeetus albicilla) and the Golden Eagle (Aquila chrysaetos) was studied in Finnmark, the northernmost county of Norway for two winters, in 2009 and 2010. Artificial carrion was laid out as bait on four peninsulas, along with automatic digital cameras which took picture on 5-15 minutes interval. The pattern of carcass use was evaluated in relation to distance from coast and forest, altitude, peninsula, year and day of the year. Furthermore, I investigated whether there were differences in the time spent scavenging each day. Juvenile eagles of both species and subadult White-tailed Eagles were rare on the carcasses, while subadult Golden Eagles and adults of both species occurred at similar, but overall, rather low frequencies. In general, occupancy on carcass decreases with distance from coast for both species, most clearly so for adult White-tailed Eagles. Subadult Golden Eagles were fairly evenly distributed across the peninsulas. Adult Golden Eagles were more common on the Sværholt and Varanger peninsulas, while adult White-tailed eagles were most common on the Nordkinn and Sværholt peninsulas. I detected no differences between the age groups in time period spent scavenging per day. The intensity of use of the carrion was too low in both eagle species for interference competition for such food resources to be a likely determinant of the spatial and temporal distribution of eagles during the winters in Finnmark. |
format |
Master Thesis |
author |
Pálsdóttir, Elínborg Sædís |
author_facet |
Pálsdóttir, Elínborg Sædís |
author_sort |
Pálsdóttir, Elínborg Sædís |
title |
Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
title_short |
Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
title_full |
Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
title_fullStr |
Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
title_full_unstemmed |
Demographic patterns in winter carcass use by Golden Eagle and White-tailed Eagle in Finnmark, Norway |
title_sort |
demographic patterns in winter carcass use by golden eagle and white-tailed eagle in finnmark, norway |
publisher |
Universitetet i Tromsø |
publishDate |
2012 |
url |
https://hdl.handle.net/10037/4105 |
long_lat |
ENVELOPE(27.645,27.645,71.133,71.133) ENVELOPE(26.684,26.684,70.962,70.962) |
geographic |
Norway Nordkinn Sværholt |
geographic_facet |
Norway Nordkinn Sværholt |
genre |
Finnmark Haliaeetus albicilla Varanger White-tailed eagle Aquila chrysaetos Finnmark golden eagle |
genre_facet |
Finnmark Haliaeetus albicilla Varanger White-tailed eagle Aquila chrysaetos Finnmark golden eagle |
op_relation |
https://hdl.handle.net/10037/4105 URN:NBN:no-uit_munin_3825 |
op_rights |
openAccess Copyright 2012 The Author(s) |
_version_ |
1765999365762056192 |