Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence
The effects of size‐selective fishing mortality on the growth of Atlantic cod ( Gadus morhuu L.) in the southern Gulf of St Lawrence were investigated and compared between: (1) a period when fishing mortality was relatively high, growth was relatively rapid, and abundance low (1967–1972 year classes...
Published in: | Journal of Fish Biology |
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Wiley
1992
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1992.tb03168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb03168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb03168.x |
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crwiley:10.1111/j.1095-8649.1992.tb03168.x 2024-06-02T08:03:10+00:00 Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence Hanson, J. M. Chouinard, G. A. 1992 http://dx.doi.org/10.1111/j.1095-8649.1992.tb03168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb03168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb03168.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 41, issue 1, page 31-41 ISSN 0022-1112 1095-8649 journal-article 1992 crwiley https://doi.org/10.1111/j.1095-8649.1992.tb03168.x 2024-05-03T11:10:29Z The effects of size‐selective fishing mortality on the growth of Atlantic cod ( Gadus morhuu L.) in the southern Gulf of St Lawrence were investigated and compared between: (1) a period when fishing mortality was relatively high, growth was relatively rapid, and abundance low (1967–1972 year classes): and (2) a period when fishing mortality was lower, growth was slow, and density high (1977–1982 year classes). Cod first entered the fishery at age 3 during both periods. The 1967–1972 year classes (fast growing) were fully recruited to the fishery by age 5 or 6 and the fishery removed over twice as many fish from the lower than upper quartiles of length‐at‐age distributions for cod 4 to 10 years old (disproportionately high exploitation of slow‐growing fish). In contrast. the 1977–1982 year classes (slow growing) did not fully recruit to the fishery until age 9 or 10 and the fishery removed four times as many fish from the upper than lower quartiles of the length‐at‐age distributions for 4‐ to 10‐year‐old cod (disproportionately high exploitation of fast‐growing fish). The reduced mean lengths‐at‐age of the 1977–1982 year classes compared with the 1967–I972 year‐classes is consistent with the different patterns of exploitation of fast‐ and slow‐growing fish for the two periods. Article in Journal/Newspaper atlantic cod Gadus morhua Wiley Online Library Journal of Fish Biology 41 1 31 41 |
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collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
The effects of size‐selective fishing mortality on the growth of Atlantic cod ( Gadus morhuu L.) in the southern Gulf of St Lawrence were investigated and compared between: (1) a period when fishing mortality was relatively high, growth was relatively rapid, and abundance low (1967–1972 year classes): and (2) a period when fishing mortality was lower, growth was slow, and density high (1977–1982 year classes). Cod first entered the fishery at age 3 during both periods. The 1967–1972 year classes (fast growing) were fully recruited to the fishery by age 5 or 6 and the fishery removed over twice as many fish from the lower than upper quartiles of length‐at‐age distributions for cod 4 to 10 years old (disproportionately high exploitation of slow‐growing fish). In contrast. the 1977–1982 year classes (slow growing) did not fully recruit to the fishery until age 9 or 10 and the fishery removed four times as many fish from the upper than lower quartiles of the length‐at‐age distributions for 4‐ to 10‐year‐old cod (disproportionately high exploitation of fast‐growing fish). The reduced mean lengths‐at‐age of the 1977–1982 year classes compared with the 1967–I972 year‐classes is consistent with the different patterns of exploitation of fast‐ and slow‐growing fish for the two periods. |
format |
Article in Journal/Newspaper |
author |
Hanson, J. M. Chouinard, G. A. |
spellingShingle |
Hanson, J. M. Chouinard, G. A. Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
author_facet |
Hanson, J. M. Chouinard, G. A. |
author_sort |
Hanson, J. M. |
title |
Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
title_short |
Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
title_full |
Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
title_fullStr |
Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
title_full_unstemmed |
Evidence that size‐selective mortality affects growth of Atlantic cod ( Gadus morhua L.) in the southern Gulf of St Lawrence |
title_sort |
evidence that size‐selective mortality affects growth of atlantic cod ( gadus morhua l.) in the southern gulf of st lawrence |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1992.tb03168.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb03168.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb03168.x |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of Fish Biology volume 41, issue 1, page 31-41 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1992.tb03168.x |
container_title |
Journal of Fish Biology |
container_volume |
41 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
41 |
_version_ |
1800747633359192064 |