Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations
Abstract We employed three different methods to estimate predation rates on moose in a newly colonized wolf territory in Norway. In the first two methods, we estimated predation rates based on the difference in calf/cow ratios outside and inside the wolf pack territory from (1) hunter observations a...
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fthsinnlandet:oai:brage.inn.no:11250/134148 2024-03-03T08:36:22+00:00 Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations Gundersen, Hege Solberg, Erling J. Wabakken, Petter Storaas, Torstein Zimmermann, Barbara Andreassen, Harry Peter 2008 498531 bytes application/pdf http://hdl.handle.net/11250/134148 eng eng Springer Verlag http://www.springerlink.com/content/hn8q474p475k1076/ Gundersen, H., Solberg, E.J., Wabakken, P., Storaas, T., Zimmermann, B., Andreassen, H.P. (2008) Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations. European Journal of Wildlife Research, 54(2), 335-346 http://hdl.handle.net/11250/134148 335-346 54 European Journal of Wildlife Research 2 aerial survey hunter observations management predator-prey interaction radio telemetry rovdyr bytte moose elg wolf ulv canis lupus alces alces VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 Peer reviewed Journal article 2008 fthsinnlandet 2024-02-02T12:42:21Z Abstract We employed three different methods to estimate predation rates on moose in a newly colonized wolf territory in Norway. In the first two methods, we estimated predation rates based on the difference in calf/cow ratios outside and inside the wolf pack territory from (1) hunter observations and (2) aerial surveys. In the last method, (3) we estimated loss of calves of radio-collared cows inside and outside the wolf pack territory. The difference in mortality rates estimated between the area subject to predation and the area outside the wolf pack territory essentially constitutes the additive component of predation. We also tested the sensitivity of violating the assumptions of methods 1 and 2 related to equal fecundity and mortality because of other factors than predation inside and outside the wolf pack territory. Predation rates varied considerably between years and methods used, with hunter observations (method 1) giving the lowest and aerial surveys (method 2) giving the highest estimates. Method 3 (radio telemetry) was the most direct assessment of predation and probably the best approach to estimate predation rates in moose. However, all three methods show the same yearly changes and may therefore be appropriate to question trends trough time or between areas. Article in Journal/Newspaper Alces alces Canis lupus ulv Høgskolen i Innlandet: Brage INN Norway |
institution |
Open Polar |
collection |
Høgskolen i Innlandet: Brage INN |
op_collection_id |
fthsinnlandet |
language |
English |
topic |
aerial survey hunter observations management predator-prey interaction radio telemetry rovdyr bytte moose elg wolf ulv canis lupus alces alces VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 |
spellingShingle |
aerial survey hunter observations management predator-prey interaction radio telemetry rovdyr bytte moose elg wolf ulv canis lupus alces alces VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 Gundersen, Hege Solberg, Erling J. Wabakken, Petter Storaas, Torstein Zimmermann, Barbara Andreassen, Harry Peter Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
topic_facet |
aerial survey hunter observations management predator-prey interaction radio telemetry rovdyr bytte moose elg wolf ulv canis lupus alces alces VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 |
description |
Abstract We employed three different methods to estimate predation rates on moose in a newly colonized wolf territory in Norway. In the first two methods, we estimated predation rates based on the difference in calf/cow ratios outside and inside the wolf pack territory from (1) hunter observations and (2) aerial surveys. In the last method, (3) we estimated loss of calves of radio-collared cows inside and outside the wolf pack territory. The difference in mortality rates estimated between the area subject to predation and the area outside the wolf pack territory essentially constitutes the additive component of predation. We also tested the sensitivity of violating the assumptions of methods 1 and 2 related to equal fecundity and mortality because of other factors than predation inside and outside the wolf pack territory. Predation rates varied considerably between years and methods used, with hunter observations (method 1) giving the lowest and aerial surveys (method 2) giving the highest estimates. Method 3 (radio telemetry) was the most direct assessment of predation and probably the best approach to estimate predation rates in moose. However, all three methods show the same yearly changes and may therefore be appropriate to question trends trough time or between areas. |
format |
Article in Journal/Newspaper |
author |
Gundersen, Hege Solberg, Erling J. Wabakken, Petter Storaas, Torstein Zimmermann, Barbara Andreassen, Harry Peter |
author_facet |
Gundersen, Hege Solberg, Erling J. Wabakken, Petter Storaas, Torstein Zimmermann, Barbara Andreassen, Harry Peter |
author_sort |
Gundersen, Hege |
title |
Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
title_short |
Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
title_full |
Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
title_fullStr |
Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
title_full_unstemmed |
Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations |
title_sort |
three approaches to estimate wolf canis lupus predation rates on moose alces alces populations |
publisher |
Springer Verlag |
publishDate |
2008 |
url |
http://hdl.handle.net/11250/134148 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Alces alces Canis lupus ulv |
genre_facet |
Alces alces Canis lupus ulv |
op_source |
335-346 54 European Journal of Wildlife Research 2 |
op_relation |
http://www.springerlink.com/content/hn8q474p475k1076/ Gundersen, H., Solberg, E.J., Wabakken, P., Storaas, T., Zimmermann, B., Andreassen, H.P. (2008) Three approaches to estimate wolf Canis lupus predation rates on moose Alces alces populations. European Journal of Wildlife Research, 54(2), 335-346 http://hdl.handle.net/11250/134148 |
_version_ |
1792502429059645440 |