Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway
A dense island population of Eagle-Owls (Bubo bubo) close to the Arctic circle had suffered considerable mortality due to powerlines (electrocution and collision) throughout many decades. A study using GPS transmitter technology was carried out between 2009 and 2014. We studied home-range sizes, dis...
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ftninstnf:oai:brage.nina.no:11250/3084408 2023-09-05T13:17:32+02:00 Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway Nygård, Torgeir Jacobsen, Karl-Otto Gjershaug, Jan Ove Northern Norway 2023 application/pdf https://hdl.handle.net/11250/3084408 eng eng Andre: CEDREN Andre: County Governor of Nordland Andre: Norwegian Environment Agency Ornis Fennica. 2023, 100 99-111. urn:issn:0030-5685 https://hdl.handle.net/11250/3084408 cristin:2166833 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Authors 13 100 Ornis Fennica VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Peer reviewed Journal article 2023 ftninstnf 2023-08-23T22:48:32Z A dense island population of Eagle-Owls (Bubo bubo) close to the Arctic circle had suffered considerable mortality due to powerlines (electrocution and collision) throughout many decades. A study using GPS transmitter technology was carried out between 2009 and 2014. We studied home-range sizes, dispersal distances, mortality, and proposed mitigation techniques to prevent accidents. We found as expected that juvenile Eagle-Owls had larger home-ranges and moved farther than adults, but both age-groups moved much less than shown elsewhere in Europe. The probable reason for this was thought to be that this population was isolated by the surrounding sea, which might act as a barrier. The GPS data indicated that the poles of the grid were used as perching posts more than expected from a random distribution. This was explained by the lack of high trees and other elevated landscape features on these low islands. As a mitigation effort, we contributed to designing a perching-device for fitting on the poles that would prevent electrocution of the owls. This is now used by several grid-owners in coastal areas with high electrocution risk and is followed up by the National action plan for Eagle-Owl in Norway. publishedVersion Article in Journal/Newspaper Arctic Bubo bubo Northern Norway Norwegian Institute for Nature Research: Brage NINA Arctic Norway |
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Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
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VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Nygård, Torgeir Jacobsen, Karl-Otto Gjershaug, Jan Ove Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
A dense island population of Eagle-Owls (Bubo bubo) close to the Arctic circle had suffered considerable mortality due to powerlines (electrocution and collision) throughout many decades. A study using GPS transmitter technology was carried out between 2009 and 2014. We studied home-range sizes, dispersal distances, mortality, and proposed mitigation techniques to prevent accidents. We found as expected that juvenile Eagle-Owls had larger home-ranges and moved farther than adults, but both age-groups moved much less than shown elsewhere in Europe. The probable reason for this was thought to be that this population was isolated by the surrounding sea, which might act as a barrier. The GPS data indicated that the poles of the grid were used as perching posts more than expected from a random distribution. This was explained by the lack of high trees and other elevated landscape features on these low islands. As a mitigation effort, we contributed to designing a perching-device for fitting on the poles that would prevent electrocution of the owls. This is now used by several grid-owners in coastal areas with high electrocution risk and is followed up by the National action plan for Eagle-Owl in Norway. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Nygård, Torgeir Jacobsen, Karl-Otto Gjershaug, Jan Ove |
author_facet |
Nygård, Torgeir Jacobsen, Karl-Otto Gjershaug, Jan Ove |
author_sort |
Nygård, Torgeir |
title |
Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
title_short |
Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
title_full |
Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
title_fullStr |
Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
title_full_unstemmed |
Home-range, movements and use of powerline poles of Eagle-Owls (Bubo bubo) at an island population in northern Norway |
title_sort |
home-range, movements and use of powerline poles of eagle-owls (bubo bubo) at an island population in northern norway |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3084408 |
op_coverage |
Northern Norway |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Bubo bubo Northern Norway |
genre_facet |
Arctic Bubo bubo Northern Norway |
op_source |
13 100 Ornis Fennica |
op_relation |
Andre: CEDREN Andre: County Governor of Nordland Andre: Norwegian Environment Agency Ornis Fennica. 2023, 100 99-111. urn:issn:0030-5685 https://hdl.handle.net/11250/3084408 cristin:2166833 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Authors |
_version_ |
1776198677240479744 |