Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland
Data collected from the fishery off the southwest coast of Newfoundland indicated a decrease in the proportions of larger and older cod in ICNAF Division 3Pn in recent years. Changes in total mortality rates in 3Pn and on Burgeo Bank have been attributed to fluctuations in total landings and effort....
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Canadian Science Publishing
1969
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crcansciencepubl:10.1139/f69-298 2023-12-17T10:27:04+01:00 Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland Pinhorn, Allenby T. 1969 http://dx.doi.org/10.1139/f69-298 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-298 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 26, issue 12, page 3133-3164 ISSN 0015-296X General Medicine journal-article 1969 crcansciencepubl https://doi.org/10.1139/f69-298 2023-11-19T13:39:17Z Data collected from the fishery off the southwest coast of Newfoundland indicated a decrease in the proportions of larger and older cod in ICNAF Division 3Pn in recent years. Changes in total mortality rates in 3Pn and on Burgeo Bank have been attributed to fluctuations in total landings and effort. Decreased growth rates for the younger cod and increased followed by decreased growth for the older cod were attributed to increased food supply superimposed on decreased bottom temperatures. Cod from Burgeo Bank grow faster than those from 3Pn. Sizes caught by various types of inshore boats were similar but larger fish were caught in deeper water, in eastern rather than western localities, and in the latter part of the season. Peak spawning occurs in May. Males were predominant in longline catches and matured at an earlier age and smaller size than females. Fish in the 3Pn area matured earlier and at a smaller size than Burgeo Bank fish. Vertebral averages at different localities in the area were similar but averages have decreased in recent years. Limited data on weights and fecundity are presented. Results are discussed in light of the separation of West Newfoundland and Burgeo Bank stocks. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 26 12 3133 3164 |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
topic |
General Medicine |
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General Medicine Pinhorn, Allenby T. Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
topic_facet |
General Medicine |
description |
Data collected from the fishery off the southwest coast of Newfoundland indicated a decrease in the proportions of larger and older cod in ICNAF Division 3Pn in recent years. Changes in total mortality rates in 3Pn and on Burgeo Bank have been attributed to fluctuations in total landings and effort. Decreased growth rates for the younger cod and increased followed by decreased growth for the older cod were attributed to increased food supply superimposed on decreased bottom temperatures. Cod from Burgeo Bank grow faster than those from 3Pn. Sizes caught by various types of inshore boats were similar but larger fish were caught in deeper water, in eastern rather than western localities, and in the latter part of the season. Peak spawning occurs in May. Males were predominant in longline catches and matured at an earlier age and smaller size than females. Fish in the 3Pn area matured earlier and at a smaller size than Burgeo Bank fish. Vertebral averages at different localities in the area were similar but averages have decreased in recent years. Limited data on weights and fecundity are presented. Results are discussed in light of the separation of West Newfoundland and Burgeo Bank stocks. |
format |
Article in Journal/Newspaper |
author |
Pinhorn, Allenby T. |
author_facet |
Pinhorn, Allenby T. |
author_sort |
Pinhorn, Allenby T. |
title |
Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
title_short |
Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
title_full |
Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
title_fullStr |
Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
title_full_unstemmed |
Fishery and Biology of Atlantic Cod ( Gadus morhua ) off the Southwest Coast of Newfoundland |
title_sort |
fishery and biology of atlantic cod ( gadus morhua ) off the southwest coast of newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/f69-298 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-298 |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
Journal of the Fisheries Research Board of Canada volume 26, issue 12, page 3133-3164 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f69-298 |
container_title |
Journal of the Fisheries Research Board of Canada |
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26 |
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12 |
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3133 |
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3164 |
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