Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries
Abstract Seasonal cycle in weight and physiological condition of Atlantic cod (Gadus morhua) influenced productivity and economic impacts of the cod fishery in Placentia Bay, Newfoundland. Condition indices (Fulton's K condition factor and hepatosomatic index – HSI) were lowest during the spawn...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2005
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.icesjms.2005.03.008 http://academic.oup.com/icesjms/article-pdf/62/5/1006/29151033/62-5-1006.pdf |
id |
croxfordunivpr:10.1016/j.icesjms.2005.03.008 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1016/j.icesjms.2005.03.008 2024-05-19T07:37:06+00:00 Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries Mello, L.G.S. Rose, G.A. 2005 http://dx.doi.org/10.1016/j.icesjms.2005.03.008 http://academic.oup.com/icesjms/article-pdf/62/5/1006/29151033/62-5-1006.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 62, issue 5, page 1006-1015 ISSN 1095-9289 1054-3139 journal-article 2005 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.03.008 2024-05-02T09:30:32Z Abstract Seasonal cycle in weight and physiological condition of Atlantic cod (Gadus morhua) influenced productivity and economic impacts of the cod fishery in Placentia Bay, Newfoundland. Condition indices (Fulton's K condition factor and hepatosomatic index – HSI) were lowest during the spawning season (spring) and increased rapidly during the postspawning period, reaching maximum values by fall (K and HSI increased on average 24% and 82% between spring and fall, respectively). Somatic weight and condition indices varied seasonally. Condition indices were correlated with an industry index of product yield. Historically, cod fisheries have been prosecuted during all seasons, but simulations of 1997–1999 fisheries indicate that a fall fishery (period of peak physiological condition) resulted in a 8–17% decrease in the number of cod removed from the stock while maintaining the same weight-based quotas, and profiting from maximum yield and better product quality. Spring and summer fisheries resulted in lower yield (6%) and quality (5–26%) of fish products by weight. Seasonal biological cycles could be used as templates for management strategies that promote fisheries conservation and economic benefits by harvesting fish during periods when biological impacts are minimal and economic returns maximal. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Oxford University Press ICES Journal of Marine Science 62 5 1006 1015 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract Seasonal cycle in weight and physiological condition of Atlantic cod (Gadus morhua) influenced productivity and economic impacts of the cod fishery in Placentia Bay, Newfoundland. Condition indices (Fulton's K condition factor and hepatosomatic index – HSI) were lowest during the spawning season (spring) and increased rapidly during the postspawning period, reaching maximum values by fall (K and HSI increased on average 24% and 82% between spring and fall, respectively). Somatic weight and condition indices varied seasonally. Condition indices were correlated with an industry index of product yield. Historically, cod fisheries have been prosecuted during all seasons, but simulations of 1997–1999 fisheries indicate that a fall fishery (period of peak physiological condition) resulted in a 8–17% decrease in the number of cod removed from the stock while maintaining the same weight-based quotas, and profiting from maximum yield and better product quality. Spring and summer fisheries resulted in lower yield (6%) and quality (5–26%) of fish products by weight. Seasonal biological cycles could be used as templates for management strategies that promote fisheries conservation and economic benefits by harvesting fish during periods when biological impacts are minimal and economic returns maximal. |
format |
Article in Journal/Newspaper |
author |
Mello, L.G.S. Rose, G.A. |
spellingShingle |
Mello, L.G.S. Rose, G.A. Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
author_facet |
Mello, L.G.S. Rose, G.A. |
author_sort |
Mello, L.G.S. |
title |
Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
title_short |
Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
title_full |
Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
title_fullStr |
Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
title_full_unstemmed |
Seasonal cycles in weight and condition in Atlantic cod (Gadus morhua L.) in relation to fisheries |
title_sort |
seasonal cycles in weight and condition in atlantic cod (gadus morhua l.) in relation to fisheries |
publisher |
Oxford University Press (OUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.03.008 http://academic.oup.com/icesjms/article-pdf/62/5/1006/29151033/62-5-1006.pdf |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
ICES Journal of Marine Science volume 62, issue 5, page 1006-1015 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.03.008 |
container_title |
ICES Journal of Marine Science |
container_volume |
62 |
container_issue |
5 |
container_start_page |
1006 |
op_container_end_page |
1015 |
_version_ |
1799476335022702592 |