Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland
Diet composition of grey seals in the Gulf of St. Lawrence (Gulf) and around the coast of Newfoundland, Canada, was examined using identification of otoliths recovered from digestive tracts. Prey were recovered from 632 animals. Twenty-nine different prey taxa were identified. Grey seals sampled in...
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Septentrio Academic Publishing
2007
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/2729 2023-05-15T15:27:20+02:00 Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland Hammill, M O Stenson, G B Proust, F Carter, P McKinnon, D 2007-01-01 application/pdf https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729 https://doi.org/10.7557/3.2729 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729/2578 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729 doi:10.7557/3.2729 Copyright (c) 2007 M O Hammill, G B Stenson, F Proust, P Carter, D McKinnon http://creativecommons.org/licenses/by/3.0/ CC-BY NAMMCO Scientific Publications; Vol 6: Grey seals in the North Atlantic and the Baltic; 135-152 2309-2491 1560-2206 10.7557/3.6 grey seals diet Newfoundland Gulf of St Lawrence otoliths info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2007 ftunitroemsoe https://doi.org/10.7557/3.2729 https://doi.org/10.7557/3.6 2021-08-16T16:39:00Z Diet composition of grey seals in the Gulf of St. Lawrence (Gulf) and around the coast of Newfoundland, Canada, was examined using identification of otoliths recovered from digestive tracts. Prey were recovered from 632 animals. Twenty-nine different prey taxa were identified. Grey seals sampled in the northern Gulf of St. Lawrence fed mainly on capelin, mackerel, wolffish and lumpfish during the spring, but consumed more cod, sandlance and winter flounder during late summer. Overall, the southern Gulf diet was more diverse, with sandlance, Atlantic cod, cunner, white hake and Atlantic herring dominating the diet. Capelin and winter flounder were the dominant prey in grey seals sampled from the east coast of Newfoundland, while Atlantic cod, flatfish and capelin were the most important prey from the south coast. Animals consumed prey with an average length of 20.4 cm (Range 4.2-99.2 cm). Capelin were the shortest prey (Mean = 13.9 cm, SE = 0.08, N = 1126), while wolffish were the longest with the largest fish having an estimated length of 99.2 cm (Mean = 59.4, SE = 2.8, N = 63). In the early 1990s most cod fisheries in Atlantic Canada were closed because of the collapse of the stocks. Since then they have shown limited sign of recovery. Diet samples from the west coast of Newfoundland indicate a decline in the contribution of cod to the diet from the pre-collapse to the postcollapse period, while samples from the southern Gulf indicate little change in the contribution of cod. Article in Journal/Newspaper atlantic cod Newfoundland University of Tromsø: Septentrio Academic Publishing Canada Hake ENVELOPE(15.612,15.612,66.797,66.797) NAMMCO Scientific Publications 6 135 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
grey seals diet Newfoundland Gulf of St Lawrence otoliths |
spellingShingle |
grey seals diet Newfoundland Gulf of St Lawrence otoliths Hammill, M O Stenson, G B Proust, F Carter, P McKinnon, D Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
topic_facet |
grey seals diet Newfoundland Gulf of St Lawrence otoliths |
description |
Diet composition of grey seals in the Gulf of St. Lawrence (Gulf) and around the coast of Newfoundland, Canada, was examined using identification of otoliths recovered from digestive tracts. Prey were recovered from 632 animals. Twenty-nine different prey taxa were identified. Grey seals sampled in the northern Gulf of St. Lawrence fed mainly on capelin, mackerel, wolffish and lumpfish during the spring, but consumed more cod, sandlance and winter flounder during late summer. Overall, the southern Gulf diet was more diverse, with sandlance, Atlantic cod, cunner, white hake and Atlantic herring dominating the diet. Capelin and winter flounder were the dominant prey in grey seals sampled from the east coast of Newfoundland, while Atlantic cod, flatfish and capelin were the most important prey from the south coast. Animals consumed prey with an average length of 20.4 cm (Range 4.2-99.2 cm). Capelin were the shortest prey (Mean = 13.9 cm, SE = 0.08, N = 1126), while wolffish were the longest with the largest fish having an estimated length of 99.2 cm (Mean = 59.4, SE = 2.8, N = 63). In the early 1990s most cod fisheries in Atlantic Canada were closed because of the collapse of the stocks. Since then they have shown limited sign of recovery. Diet samples from the west coast of Newfoundland indicate a decline in the contribution of cod to the diet from the pre-collapse to the postcollapse period, while samples from the southern Gulf indicate little change in the contribution of cod. |
format |
Article in Journal/Newspaper |
author |
Hammill, M O Stenson, G B Proust, F Carter, P McKinnon, D |
author_facet |
Hammill, M O Stenson, G B Proust, F Carter, P McKinnon, D |
author_sort |
Hammill, M O |
title |
Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
title_short |
Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
title_full |
Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
title_fullStr |
Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
title_full_unstemmed |
Feeding by grey seals in the Gulf of St. Lawrence and around Newfoundland |
title_sort |
feeding by grey seals in the gulf of st. lawrence and around newfoundland |
publisher |
Septentrio Academic Publishing |
publishDate |
2007 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729 https://doi.org/10.7557/3.2729 |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Canada Hake |
geographic_facet |
Canada Hake |
genre |
atlantic cod Newfoundland |
genre_facet |
atlantic cod Newfoundland |
op_source |
NAMMCO Scientific Publications; Vol 6: Grey seals in the North Atlantic and the Baltic; 135-152 2309-2491 1560-2206 10.7557/3.6 |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729/2578 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2729 doi:10.7557/3.2729 |
op_rights |
Copyright (c) 2007 M O Hammill, G B Stenson, F Proust, P Carter, D McKinnon http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/3.2729 https://doi.org/10.7557/3.6 |
container_title |
NAMMCO Scientific Publications |
container_volume |
6 |
container_start_page |
135 |
_version_ |
1766357773793099776 |