Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries
The relationships between catch rates and fish abundance, hydrographic conditions and fishing effort, for Atlantic cod caught by trapnets (fixed gear) and gillnets (non‐fixed gear) in the northern Gulf of St Lawrence have been quantified. Daily changes in trap catch rates were accounted for by chang...
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Language: | English |
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crwiley:10.1111/j.1095-8649.1989.tb03057.x 2024-06-02T08:03:08+00:00 Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries Rose, G. A. Leggett, W. C. 1989 http://dx.doi.org/10.1111/j.1095-8649.1989.tb03057.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1989.tb03057.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1989.tb03057.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 35, issue sA, page 155-161 ISSN 0022-1112 1095-8649 journal-article 1989 crwiley https://doi.org/10.1111/j.1095-8649.1989.tb03057.x 2024-05-03T11:09:49Z The relationships between catch rates and fish abundance, hydrographic conditions and fishing effort, for Atlantic cod caught by trapnets (fixed gear) and gillnets (non‐fixed gear) in the northern Gulf of St Lawrence have been quantified. Daily changes in trap catch rates were accounted for by changes in salinity, currents and mean local cod densities in 1985 ( R 2 = 0.78), and predicted 1986 trap catch rate changes (by 1985 model) were correlated significantly with those observed ( r = 0.60, P < 0.05). In contrast, the daily changes in 1985 gillnet catch rates were determined by currents, maximum (not mean) local cod densities, and fishing effort (negative) ( R 2 = 0.68), while predicted 1986 gillnet catch rates (by 1985 model) were significantly correlated with those observed ( r = 0.35, P < 0.05). Seasonal catchability coefficients of the traps were similar in 1985 and 1986, but for gillnets this index was an order of magnitude higher in 1986 than in 1985. Article in Journal/Newspaper atlantic cod Gadus morhua Wiley Online Library Journal of Fish Biology 35 155 161 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
The relationships between catch rates and fish abundance, hydrographic conditions and fishing effort, for Atlantic cod caught by trapnets (fixed gear) and gillnets (non‐fixed gear) in the northern Gulf of St Lawrence have been quantified. Daily changes in trap catch rates were accounted for by changes in salinity, currents and mean local cod densities in 1985 ( R 2 = 0.78), and predicted 1986 trap catch rate changes (by 1985 model) were correlated significantly with those observed ( r = 0.60, P < 0.05). In contrast, the daily changes in 1985 gillnet catch rates were determined by currents, maximum (not mean) local cod densities, and fishing effort (negative) ( R 2 = 0.68), while predicted 1986 gillnet catch rates (by 1985 model) were significantly correlated with those observed ( r = 0.35, P < 0.05). Seasonal catchability coefficients of the traps were similar in 1985 and 1986, but for gillnets this index was an order of magnitude higher in 1986 than in 1985. |
format |
Article in Journal/Newspaper |
author |
Rose, G. A. Leggett, W. C. |
spellingShingle |
Rose, G. A. Leggett, W. C. Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
author_facet |
Rose, G. A. Leggett, W. C. |
author_sort |
Rose, G. A. |
title |
Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
title_short |
Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
title_full |
Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
title_fullStr |
Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
title_full_unstemmed |
Predicting variability in catch‐per‐effort in Atlantic cod, Gadus morhua, trap and gillnet fisheries |
title_sort |
predicting variability in catch‐per‐effort in atlantic cod, gadus morhua, trap and gillnet fisheries |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1989.tb03057.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1989.tb03057.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1989.tb03057.x |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of Fish Biology volume 35, issue sA, page 155-161 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1989.tb03057.x |
container_title |
Journal of Fish Biology |
container_volume |
35 |
container_start_page |
155 |
op_container_end_page |
161 |
_version_ |
1800747609138135040 |