Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast
Abstract Øigård, T. A., Frie, A. K., Nilssen, K. T., and Hammill, M. O. 2012. Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast. – ICES Journal of Marine Science, 69: . An age-structured population dynamics model of the Norwegian grey seal (Halichoerus grypus) popu...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fss103 http://academic.oup.com/icesjms/article-pdf/69/8/1436/29144341/fss103.pdf |
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croxfordunivpr:10.1093/icesjms/fss103 2023-10-01T03:55:56+02:00 Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast Øigård, Tor Arne Frie, Anne Kirstine Nilssen, Kjell Tormod Hammill, Mike Osborne 2012 http://dx.doi.org/10.1093/icesjms/fss103 http://academic.oup.com/icesjms/article-pdf/69/8/1436/29144341/fss103.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 69, issue 8, page 1436-1447 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2012 croxfordunivpr https://doi.org/10.1093/icesjms/fss103 2023-09-08T10:43:43Z Abstract Øigård, T. A., Frie, A. K., Nilssen, K. T., and Hammill, M. O. 2012. Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast. – ICES Journal of Marine Science, 69: . An age-structured population dynamics model of the Norwegian grey seal (Halichoerus grypus) population has been developed. The model is of a Bayesian character in the sense that priors for various parameters were used. Model runs indicated an increase in the abundance of the total Norwegian grey seal population during the last 30 years, suggesting a total of 8740 (95% confidence interval: 7320–10 170) animals in 2011. A total catch of 707 (95% confidence interval: 532–882) grey seals would maintain the population size at the 2011 level. Model runs suggest that current catch levels will likely result in a reduction in the population size in Sør-Trøndelag and Nord-Trøndelag counties, and an increase in the population size in Rogaland, Nordland, Troms, and Finnmark counties. The model runs assumed that 80% of the seals taken in Rogaland came from the UK and that 50 and 55% of the catches in Troms and Finnmark, respectively, were immigrants from Russia. Article in Journal/Newspaper Finnmark Nordland Nordland Finnmark Nordland Troms Oxford University Press (via Crossref) ICES Journal of Marine Science 69 8 1436 1447 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Øigård, Tor Arne Frie, Anne Kirstine Nilssen, Kjell Tormod Hammill, Mike Osborne Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Øigård, T. A., Frie, A. K., Nilssen, K. T., and Hammill, M. O. 2012. Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast. – ICES Journal of Marine Science, 69: . An age-structured population dynamics model of the Norwegian grey seal (Halichoerus grypus) population has been developed. The model is of a Bayesian character in the sense that priors for various parameters were used. Model runs indicated an increase in the abundance of the total Norwegian grey seal population during the last 30 years, suggesting a total of 8740 (95% confidence interval: 7320–10 170) animals in 2011. A total catch of 707 (95% confidence interval: 532–882) grey seals would maintain the population size at the 2011 level. Model runs suggest that current catch levels will likely result in a reduction in the population size in Sør-Trøndelag and Nord-Trøndelag counties, and an increase in the population size in Rogaland, Nordland, Troms, and Finnmark counties. The model runs assumed that 80% of the seals taken in Rogaland came from the UK and that 50 and 55% of the catches in Troms and Finnmark, respectively, were immigrants from Russia. |
format |
Article in Journal/Newspaper |
author |
Øigård, Tor Arne Frie, Anne Kirstine Nilssen, Kjell Tormod Hammill, Mike Osborne |
author_facet |
Øigård, Tor Arne Frie, Anne Kirstine Nilssen, Kjell Tormod Hammill, Mike Osborne |
author_sort |
Øigård, Tor Arne |
title |
Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
title_short |
Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
title_full |
Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
title_fullStr |
Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
title_full_unstemmed |
Modelling the abundance of grey seals (Halichoerus grypus) along the Norwegian coast |
title_sort |
modelling the abundance of grey seals (halichoerus grypus) along the norwegian coast |
publisher |
Oxford University Press (OUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1093/icesjms/fss103 http://academic.oup.com/icesjms/article-pdf/69/8/1436/29144341/fss103.pdf |
genre |
Finnmark Nordland Nordland Finnmark Nordland Troms |
genre_facet |
Finnmark Nordland Nordland Finnmark Nordland Troms |
op_source |
ICES Journal of Marine Science volume 69, issue 8, page 1436-1447 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fss103 |
container_title |
ICES Journal of Marine Science |
container_volume |
69 |
container_issue |
8 |
container_start_page |
1436 |
op_container_end_page |
1447 |
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1778524831338201088 |