The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters
The size of the population of ringed seals (Phoca hispida) inhabiting Baffin Bay and associated waters was estimated by two methods. An approximate model of the energetics of the polar bear (Ursus maritimus) estimated an energetic need of about 16,000 MJ/bear per year. Modelled estimates of the ener...
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Septentrio Academic Publishing
1998
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Online Access: | https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988 https://doi.org/10.7557/3.2988 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/2988 2023-05-15T15:34:57+02:00 The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters Kingsley, Michael C S 1998-06-12 application/pdf https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988 https://doi.org/10.7557/3.2988 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988/2862 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988 doi:10.7557/3.2988 Copyright (c) 1998 Michael C S Kingsley http://creativecommons.org/licenses/by/3.0/ CC-BY NAMMCO Scientific Publications; Vol 1: Ringed Seals in the North Atlantic; 181-196 2309-2491 1560-2206 10.7557/3.1 ringed seals Phoca hispida predation polar bear Ursus maritimus energetics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1998 ftunitroemsoe https://doi.org/10.7557/3.2988 https://doi.org/10.7557/3.1 2021-08-16T16:42:48Z The size of the population of ringed seals (Phoca hispida) inhabiting Baffin Bay and associated waters was estimated by two methods. An approximate model of the energetics of the polar bear (Ursus maritimus) estimated an energetic need of about 16,000 MJ/bear per year. Modelled estimates of the energetic yield of a ringed seal population showed that a stable standing population of 140-170 ringed seals per bear would be needed to provide that much energy, assuming that all mortalities were due to polar bear predation. This result was sensitive to assumptions about the Field Metabolic Rate (FMR) of the bears and the energetic yield of individual ringed seals, but less sensitive to assumptions about relative incidence of predation on different age classes of seal or the age structure of the polar bear population. Estimated sizes of polar bear populations in Baffin Bay and associated waters (total about 4,025), and of the standing population needed to support an estimated hunter kill of 100,000 yielded a population estimate of, very roughly, 1.2 million ringed seals. Estimates of ice areas and of the density of hauled out seals from aerial surveys were used to generate another approximate figure for the ringed seal population, which was about the same. The density of seals in the pack-ice area of Baffin Bay, which is imperfectly known, has a large influence on the latter estimate. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Phoca hispida ringed seal Ursus maritimus University of Tromsø: Septentrio Academic Publishing Baffin Bay NAMMCO Scientific Publications 1 181 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
ringed seals Phoca hispida predation polar bear Ursus maritimus energetics |
spellingShingle |
ringed seals Phoca hispida predation polar bear Ursus maritimus energetics Kingsley, Michael C S The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
topic_facet |
ringed seals Phoca hispida predation polar bear Ursus maritimus energetics |
description |
The size of the population of ringed seals (Phoca hispida) inhabiting Baffin Bay and associated waters was estimated by two methods. An approximate model of the energetics of the polar bear (Ursus maritimus) estimated an energetic need of about 16,000 MJ/bear per year. Modelled estimates of the energetic yield of a ringed seal population showed that a stable standing population of 140-170 ringed seals per bear would be needed to provide that much energy, assuming that all mortalities were due to polar bear predation. This result was sensitive to assumptions about the Field Metabolic Rate (FMR) of the bears and the energetic yield of individual ringed seals, but less sensitive to assumptions about relative incidence of predation on different age classes of seal or the age structure of the polar bear population. Estimated sizes of polar bear populations in Baffin Bay and associated waters (total about 4,025), and of the standing population needed to support an estimated hunter kill of 100,000 yielded a population estimate of, very roughly, 1.2 million ringed seals. Estimates of ice areas and of the density of hauled out seals from aerial surveys were used to generate another approximate figure for the ringed seal population, which was about the same. The density of seals in the pack-ice area of Baffin Bay, which is imperfectly known, has a large influence on the latter estimate. |
format |
Article in Journal/Newspaper |
author |
Kingsley, Michael C S |
author_facet |
Kingsley, Michael C S |
author_sort |
Kingsley, Michael C S |
title |
The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
title_short |
The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
title_full |
The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
title_fullStr |
The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
title_full_unstemmed |
The numbers of ringed seals (Phoca hispida) in Baffin Bay and associated waters |
title_sort |
numbers of ringed seals (phoca hispida) in baffin bay and associated waters |
publisher |
Septentrio Academic Publishing |
publishDate |
1998 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988 https://doi.org/10.7557/3.2988 |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay Baffin Bay Baffin Phoca hispida ringed seal Ursus maritimus |
genre_facet |
Baffin Bay Baffin Bay Baffin Phoca hispida ringed seal Ursus maritimus |
op_source |
NAMMCO Scientific Publications; Vol 1: Ringed Seals in the North Atlantic; 181-196 2309-2491 1560-2206 10.7557/3.1 |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988/2862 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2988 doi:10.7557/3.2988 |
op_rights |
Copyright (c) 1998 Michael C S Kingsley http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/3.2988 https://doi.org/10.7557/3.1 |
container_title |
NAMMCO Scientific Publications |
container_volume |
1 |
container_start_page |
181 |
_version_ |
1766365220048994304 |