Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic
Pup production of the northwest Atlantic harp seal population (Phoca groenlandica) was estimated using a modified Petersen model corrected for tag loss and nonreporting of recovered tags. Variance estimates were corrected for the additional sources of variation due to tag loss, reporting rate, and t...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1983
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Online Access: | http://dx.doi.org/10.1139/f83-095 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-095 |
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crcansciencepubl:10.1139/f83-095 2023-12-17T10:31:01+01:00 Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic Bowen, W. D. Sergeant, D. E. 1983 http://dx.doi.org/10.1139/f83-095 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-095 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 40, issue 6, page 728-742 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1983 crcansciencepubl https://doi.org/10.1139/f83-095 2023-11-19T13:39:21Z Pup production of the northwest Atlantic harp seal population (Phoca groenlandica) was estimated using a modified Petersen model corrected for tag loss and nonreporting of recovered tags. Variance estimates were corrected for the additional sources of variation due to tag loss, reporting rate, and the estimation of the number of seals examined for tags. Experiments were conducted in March of 1978, 1979, and 1980 with 9154, 4939, and 6246 pups being tagged in each year, respectively. Estimates from short-term recoveries (within the same year) were unreliable because of failure to satisfy the assumption of uniform mixing of marked and unmarked seals. Pooled estimates from long-term recoveries (1–3 yr) were considered more reliable, with the 1978 estimate of 506 000 ± 77 000 (1 SE) and the 1979 estimate of 489 000 ± 71 000 being most reliable. Based on the results of this study and on the trend in catches of pups and immatures in West Greenland, we conclude that harp seal pup production and hence population size has probably increased since the imposition of catch quotas in 1971. Article in Journal/Newspaper Greenland Harp Seal Northwest Atlantic Phoca groenlandica Canadian Science Publishing (via Crossref) Greenland Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) Canadian Journal of Fisheries and Aquatic Sciences 40 6 728 742 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Bowen, W. D. Sergeant, D. E. Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Pup production of the northwest Atlantic harp seal population (Phoca groenlandica) was estimated using a modified Petersen model corrected for tag loss and nonreporting of recovered tags. Variance estimates were corrected for the additional sources of variation due to tag loss, reporting rate, and the estimation of the number of seals examined for tags. Experiments were conducted in March of 1978, 1979, and 1980 with 9154, 4939, and 6246 pups being tagged in each year, respectively. Estimates from short-term recoveries (within the same year) were unreliable because of failure to satisfy the assumption of uniform mixing of marked and unmarked seals. Pooled estimates from long-term recoveries (1–3 yr) were considered more reliable, with the 1978 estimate of 506 000 ± 77 000 (1 SE) and the 1979 estimate of 489 000 ± 71 000 being most reliable. Based on the results of this study and on the trend in catches of pups and immatures in West Greenland, we conclude that harp seal pup production and hence population size has probably increased since the imposition of catch quotas in 1971. |
format |
Article in Journal/Newspaper |
author |
Bowen, W. D. Sergeant, D. E. |
author_facet |
Bowen, W. D. Sergeant, D. E. |
author_sort |
Bowen, W. D. |
title |
Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
title_short |
Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
title_full |
Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
title_fullStr |
Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
title_full_unstemmed |
Mark–Recapture Estimates of Harp Seal Pup ( Phoca groenlandica ) Production in the Northwest Atlantic |
title_sort |
mark–recapture estimates of harp seal pup ( phoca groenlandica ) production in the northwest atlantic |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/f83-095 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-095 |
long_lat |
ENVELOPE(-101.250,-101.250,-71.917,-71.917) |
geographic |
Greenland Petersen |
geographic_facet |
Greenland Petersen |
genre |
Greenland Harp Seal Northwest Atlantic Phoca groenlandica |
genre_facet |
Greenland Harp Seal Northwest Atlantic Phoca groenlandica |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 40, issue 6, page 728-742 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f83-095 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
40 |
container_issue |
6 |
container_start_page |
728 |
op_container_end_page |
742 |
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1785584157214113792 |