Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003
A long-term photo-identification study of killer whales (Orcinus orca) in northern Norway was initiated in 1986, when their prey the Norwegian spring-spawning herring (Clupea harengus) started to winter in a complex fjord system. The aim of this work was to estimate population size and apparent surv...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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2014
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/population-size-survival-and-reproductive-rates-of-northern-norwegian-killer-whales-orcinus-orca-in-19862003(34f3c68c-ed92-415e-9ac8-268c06e2e497).html https://doi.org/10.1017/S0025315413000933 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/34f3c68c-ed92-415e-9ac8-268c06e2e497 2023-05-15T17:03:23+02:00 Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 Kuningas, Sanna Maarit Similä, Tiu Hammond, Philip Steven 2014 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/population-size-survival-and-reproductive-rates-of-northern-norwegian-killer-whales-orcinus-orca-in-19862003(34f3c68c-ed92-415e-9ac8-268c06e2e497).html https://doi.org/10.1017/S0025315413000933 eng eng info:eu-repo/semantics/restrictedAccess Kuningas , S M , Similä , T & Hammond , P S 2014 , ' Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 ' , Journal of the Marine Biological Association of the United Kingdom , vol. 94 , no. 6 , pp. 1277-1291 . https://doi.org/10.1017/S0025315413000933 article 2014 ftunstandrewcris https://doi.org/10.1017/S0025315413000933 2021-12-26T14:22:39Z A long-term photo-identification study of killer whales (Orcinus orca) in northern Norway was initiated in 1986, when their prey the Norwegian spring-spawning herring (Clupea harengus) started to winter in a complex fjord system. The aim of this work was to estimate population size and apparent survival rates in this killer whale population using photo-identification and mark–recapture techniques with data collected during October–December 1986–2003. Total population size was estimated to be highest in 2003: 731 individuals (SE = 139, 95% CI = 505–1059) using a model taking heterogeneity of capture probabilities into account. Apparent survival of adult males and adult females was estimated using the Cormack–Jolly–Seber model as 0.971 (SE = 0.008) and 0.977 (SE = 0.009), respectively. Calving intervals ranged from 3 to 14 years (mean = 5.06, SE = 0.722). These are the first estimates of northern Norwegian killer whale population parameters, allowing their dynamics to be investigated and comparisons to be made with killer whale populations globally. Article in Journal/Newspaper Killer Whale Northern Norway Orca Orcinus orca Killer whale University of St Andrews: Research Portal Norway Journal of the Marine Biological Association of the United Kingdom 94 6 1277 1291 |
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Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
A long-term photo-identification study of killer whales (Orcinus orca) in northern Norway was initiated in 1986, when their prey the Norwegian spring-spawning herring (Clupea harengus) started to winter in a complex fjord system. The aim of this work was to estimate population size and apparent survival rates in this killer whale population using photo-identification and mark–recapture techniques with data collected during October–December 1986–2003. Total population size was estimated to be highest in 2003: 731 individuals (SE = 139, 95% CI = 505–1059) using a model taking heterogeneity of capture probabilities into account. Apparent survival of adult males and adult females was estimated using the Cormack–Jolly–Seber model as 0.971 (SE = 0.008) and 0.977 (SE = 0.009), respectively. Calving intervals ranged from 3 to 14 years (mean = 5.06, SE = 0.722). These are the first estimates of northern Norwegian killer whale population parameters, allowing their dynamics to be investigated and comparisons to be made with killer whale populations globally. |
format |
Article in Journal/Newspaper |
author |
Kuningas, Sanna Maarit Similä, Tiu Hammond, Philip Steven |
spellingShingle |
Kuningas, Sanna Maarit Similä, Tiu Hammond, Philip Steven Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
author_facet |
Kuningas, Sanna Maarit Similä, Tiu Hammond, Philip Steven |
author_sort |
Kuningas, Sanna Maarit |
title |
Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
title_short |
Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
title_full |
Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
title_fullStr |
Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
title_full_unstemmed |
Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 |
title_sort |
population size, survival and reproductive rates of northern norwegian killer whales (orcinus orca) in 1986-2003 |
publishDate |
2014 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/population-size-survival-and-reproductive-rates-of-northern-norwegian-killer-whales-orcinus-orca-in-19862003(34f3c68c-ed92-415e-9ac8-268c06e2e497).html https://doi.org/10.1017/S0025315413000933 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Killer Whale Northern Norway Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Northern Norway Orca Orcinus orca Killer whale |
op_source |
Kuningas , S M , Similä , T & Hammond , P S 2014 , ' Population size, survival and reproductive rates of northern Norwegian killer whales (Orcinus orca) in 1986-2003 ' , Journal of the Marine Biological Association of the United Kingdom , vol. 94 , no. 6 , pp. 1277-1291 . https://doi.org/10.1017/S0025315413000933 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1017/S0025315413000933 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
94 |
container_issue |
6 |
container_start_page |
1277 |
op_container_end_page |
1291 |
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1766057248488947712 |