Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002
Abstract From 14 March to 6 April 2002 aerial surveys were carried out in the Greenland Sea pack ice (referred to as the “West Ice”), to assess the pup production of the Greenland Sea population of harp seals, Pagophilus groenlandicus. One fixed-wing twin-engined aircraft was used for reconnaissance...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2006
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.icesjms.2005.07.005 http://academic.oup.com/icesjms/article-pdf/63/1/95/29125126/63-1-95.pdf |
id |
croxfordunivpr:10.1016/j.icesjms.2005.07.005 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1016/j.icesjms.2005.07.005 2023-12-31T10:05:08+01:00 Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 Haug, Tore Stenson, Garry B. Corkeron, Peter J. Nilssen, Kjell T. 2006 http://dx.doi.org/10.1016/j.icesjms.2005.07.005 http://academic.oup.com/icesjms/article-pdf/63/1/95/29125126/63-1-95.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 63, issue 1, page 95-104 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.07.005 2023-12-06T08:36:08Z Abstract From 14 March to 6 April 2002 aerial surveys were carried out in the Greenland Sea pack ice (referred to as the “West Ice”), to assess the pup production of the Greenland Sea population of harp seals, Pagophilus groenlandicus. One fixed-wing twin-engined aircraft was used for reconnaissance flights and photographic strip transect surveys of the whelping patches once they had been located and identified. A helicopter assisted in the reconnaissance flights, and was used subsequently to fly visual strip transect surveys over the whelping patches. The helicopter was also used to collect data for estimating the distribution of births over time. Three harp seal breeding patches (A, B, and C) were located and surveyed either visually or photographically. Results from the staging flights suggest that the majority of harp seal females in the Greenland Sea whelped between 16 and 21 March. The calculated temporal distribution of births were used to correct the estimates obtained for Patch B. No correction was considered necessary for Patch A. No staging was performed in Patch C; the estimate obtained for this patch may, therefore, be slightly negatively biased. The total estimate of pup production, including the visual survey of Patch A, both visual and photographic surveys of Patch B, and photographic survey of Patch C, was 98 500 (s.e. = 16 800), giving a coefficient of variation of 17.9% for the survey. Adding the obtained Greenland Sea pup production estimate to recent estimates obtained using similar methods in the Northwest Atlantic (in 1999) and in the Barents Sea/White Sea (in 2002), it appears that the entire North Atlantic harp seal pup production, as determined at the turn of the century, is at least 1.4 million animals per year. Article in Journal/Newspaper Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic Pagophilus groenlandicus White Sea Oxford University Press (via Crossref) ICES Journal of Marine Science 63 1 95 104 |
institution |
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 Haug, Tore Stenson, Garry B. Corkeron, Peter J. Nilssen, Kjell T. Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract From 14 March to 6 April 2002 aerial surveys were carried out in the Greenland Sea pack ice (referred to as the “West Ice”), to assess the pup production of the Greenland Sea population of harp seals, Pagophilus groenlandicus. One fixed-wing twin-engined aircraft was used for reconnaissance flights and photographic strip transect surveys of the whelping patches once they had been located and identified. A helicopter assisted in the reconnaissance flights, and was used subsequently to fly visual strip transect surveys over the whelping patches. The helicopter was also used to collect data for estimating the distribution of births over time. Three harp seal breeding patches (A, B, and C) were located and surveyed either visually or photographically. Results from the staging flights suggest that the majority of harp seal females in the Greenland Sea whelped between 16 and 21 March. The calculated temporal distribution of births were used to correct the estimates obtained for Patch B. No correction was considered necessary for Patch A. No staging was performed in Patch C; the estimate obtained for this patch may, therefore, be slightly negatively biased. The total estimate of pup production, including the visual survey of Patch A, both visual and photographic surveys of Patch B, and photographic survey of Patch C, was 98 500 (s.e. = 16 800), giving a coefficient of variation of 17.9% for the survey. Adding the obtained Greenland Sea pup production estimate to recent estimates obtained using similar methods in the Northwest Atlantic (in 1999) and in the Barents Sea/White Sea (in 2002), it appears that the entire North Atlantic harp seal pup production, as determined at the turn of the century, is at least 1.4 million animals per year. |
format |
Article in Journal/Newspaper |
author |
Haug, Tore Stenson, Garry B. Corkeron, Peter J. Nilssen, Kjell T. |
author_facet |
Haug, Tore Stenson, Garry B. Corkeron, Peter J. Nilssen, Kjell T. |
author_sort |
Haug, Tore |
title |
Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
title_short |
Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
title_full |
Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
title_fullStr |
Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
title_full_unstemmed |
Estimation of harp seal (Pagophilus groenlandicus) pup production in the North Atlantic completed: results from surveys in the Greenland Sea in 2002 |
title_sort |
estimation of harp seal (pagophilus groenlandicus) pup production in the north atlantic completed: results from surveys in the greenland sea in 2002 |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.07.005 http://academic.oup.com/icesjms/article-pdf/63/1/95/29125126/63-1-95.pdf |
genre |
Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic Pagophilus groenlandicus White Sea |
genre_facet |
Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic Pagophilus groenlandicus White Sea |
op_source |
ICES Journal of Marine Science volume 63, issue 1, page 95-104 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.07.005 |
container_title |
ICES Journal of Marine Science |
container_volume |
63 |
container_issue |
1 |
container_start_page |
95 |
op_container_end_page |
104 |
_version_ |
1786836622758641664 |