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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on September 1, 2007
ICES Journal of Marine Science: Journal du Conseil 2007 64(7):1356-1365; doi:10.1093/icesjms/fsm118
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© 2007 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Historical population assessment of Barents Sea harp seals (Pagophilus groenlandicus)

Hans J. Skaug1,, Lennart Frimannslund1 and Nils I. Øien2

1 University of Bergen, Department of Mathematics, Johannes Brunsgate 12, 5008 Bergen, Norway
2 Institute of Marine Research, PO Box 1870 Nordnes, N-5817 Bergen, Norway

Correspondence to H. J. Skaug: tel: +47 55 584861; fax: +47 55 589672; e-mail: skaug{at}math.uib.no

Skaug, H. J., Frimannslund, L., and Øien, N. I. 2007. Historical population assessment of Barents Sea harp seals (Pagophilus groenlandicus). – ICES Journal of Marine Science, 64: 1356–1365: –.

Harp seals are an important component of the Barents Sea ecosystem. Population size is estimated to have been around 6 million seals in 1875, when large-scale exploitation by Norwegian and Russian hunters started. The estimate is obtained by fitting a population dynamics model to all available sources of data on Barents Sea harp seals, but because of a lack of information about several key parameters in the model, the uncertainty associated with the estimate is large. A sensitivity study involving three different mechanisms for density-dependence results in a range estimate of 3–7 million seals in 1875.

Keywords: catch history, density-dependence, population estimation

Received 21 December 2006; accepted 7 July 2007; advance access publication 1 September 2007.


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