Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua )
We used daily acoustic estimates of the abundance and range of a migratory demersal species, Atlantic cod (Gadus morhua), coupled with catch statistics from a mobile gillnet fishery in the northern Gulf of St. Lawrence, to verify two predictions of the Paloheimo–Dickie hypothesis: (1) that biomass a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1991
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Online Access: | http://dx.doi.org/10.1139/f91-100 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-100 |
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crcansciencepubl:10.1139/f91-100 2024-04-28T08:12:57+00:00 Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) Rose, G. A. Leggett, W. C. 1991 http://dx.doi.org/10.1139/f91-100 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-100 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 5, page 843-848 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-100 2024-04-09T06:56:28Z We used daily acoustic estimates of the abundance and range of a migratory demersal species, Atlantic cod (Gadus morhua), coupled with catch statistics from a mobile gillnet fishery in the northern Gulf of St. Lawrence, to verify two predictions of the Paloheimo–Dickie hypothesis: (1) that biomass and range of fish distributions are positive covariates and (2) that catchability (q) is negatively correlated with biomass and occupied range. Fishing power changed little during this study (1985–86) and was thus not a major cause of variation in q. The daily biomass (b) of cod surveyed on the fishing ground was significantly and positively correlated with the range occupied (a) in both 1985 and 1986 (b = 86a 1.05 R 2 = 0.71; P < 0.05). Local cod densities assessed at small scales (1 km) were relatively stable. Daily catchability was a negative multiplicative function of both biomass (q = 0.095b −0.787 R 2 = 0.70; P < 0.05) and occupied range (q = 0.003a −0.747 R 2 = 0.56; P < 0.05). The q–range relationship derived in 1986 was used to hindcast q in 1985. Hindcast and observed 1985 q's were significantly correlated (r = 0.74; P < 0.05). Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 48 5 843 848 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Rose, G. A. Leggett, W. C. Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We used daily acoustic estimates of the abundance and range of a migratory demersal species, Atlantic cod (Gadus morhua), coupled with catch statistics from a mobile gillnet fishery in the northern Gulf of St. Lawrence, to verify two predictions of the Paloheimo–Dickie hypothesis: (1) that biomass and range of fish distributions are positive covariates and (2) that catchability (q) is negatively correlated with biomass and occupied range. Fishing power changed little during this study (1985–86) and was thus not a major cause of variation in q. The daily biomass (b) of cod surveyed on the fishing ground was significantly and positively correlated with the range occupied (a) in both 1985 and 1986 (b = 86a 1.05 R 2 = 0.71; P < 0.05). Local cod densities assessed at small scales (1 km) were relatively stable. Daily catchability was a negative multiplicative function of both biomass (q = 0.095b −0.787 R 2 = 0.70; P < 0.05) and occupied range (q = 0.003a −0.747 R 2 = 0.56; P < 0.05). The q–range relationship derived in 1986 was used to hindcast q in 1985. Hindcast and observed 1985 q's were significantly correlated (r = 0.74; P < 0.05). |
format |
Article in Journal/Newspaper |
author |
Rose, G. A. Leggett, W. C. |
author_facet |
Rose, G. A. Leggett, W. C. |
author_sort |
Rose, G. A. |
title |
Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
title_short |
Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
title_full |
Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
title_fullStr |
Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
title_full_unstemmed |
Effects of Biomass–Range Interactions on Catchability of Migratory Demersal Fish by Mobile Fisheries: An Example of Atlantic Cod ( Gadus morhua ) |
title_sort |
effects of biomass–range interactions on catchability of migratory demersal fish by mobile fisheries: an example of atlantic cod ( gadus morhua ) |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-100 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-100 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 5, page 843-848 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-100 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
5 |
container_start_page |
843 |
op_container_end_page |
848 |
_version_ |
1797579649913454592 |