Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua)
Abstract With seal populations increasing significantly in the Baltic Sea, the conflict between seals and fisheries is growing. The most sustainable method for mitigating the seal–fishery conflict is to develop and use seal-safe fishing gear. Although pots have been shown to be a promising alternati...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsz167 http://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsz167/29810189/fsz167.pdf |
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croxfordunivpr:10.1093/icesjms/fsz167 2023-05-15T15:27:37+02:00 Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) Ljungberg, Peter Ovegård, Maria Öhman, Kristin Königson, Sara Anderson, Emory 2019 http://dx.doi.org/10.1093/icesjms/fsz167 http://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsz167/29810189/fsz167.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2019 croxfordunivpr https://doi.org/10.1093/icesjms/fsz167 2022-10-07T09:36:27Z Abstract With seal populations increasing significantly in the Baltic Sea, the conflict between seals and fisheries is growing. The most sustainable method for mitigating the seal–fishery conflict is to develop and use seal-safe fishing gear. Although pots have been shown to be a promising alternative to gillnets for catching cod (Gadus morhua), there are indications that cod caught in pots are in poorer condition than those caught in gillnets, potentially making the pots a less-economical alternative. This study investigates whether this difference in condition is consistent over larger spatial scales. Gear-specific cod condition was related to both short-term (determined from stomach contents) and long-term (determined by stable isotope analysis) diet composition. Results indicate that differences in fish condition between gear types are consistent over large areas, possibly due to temporal and spatial differences in feeding strategies. We argue that condition differences between pot- and gillnet-caught cod may be driven by differences in behavioural traits. Consequently, fishing with a certain gear type may have ecological consequences affecting population characteristics, with implications for fisheries management. From the perspective of the seal–fisheries conflict, pots may ultimately have consequences on the catch value of fish. Article in Journal/Newspaper atlantic cod Gadus morhua Oxford University Press (via Crossref) ICES Journal of Marine Science |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Ljungberg, Peter Ovegård, Maria Öhman, Kristin Königson, Sara Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract With seal populations increasing significantly in the Baltic Sea, the conflict between seals and fisheries is growing. The most sustainable method for mitigating the seal–fishery conflict is to develop and use seal-safe fishing gear. Although pots have been shown to be a promising alternative to gillnets for catching cod (Gadus morhua), there are indications that cod caught in pots are in poorer condition than those caught in gillnets, potentially making the pots a less-economical alternative. This study investigates whether this difference in condition is consistent over larger spatial scales. Gear-specific cod condition was related to both short-term (determined from stomach contents) and long-term (determined by stable isotope analysis) diet composition. Results indicate that differences in fish condition between gear types are consistent over large areas, possibly due to temporal and spatial differences in feeding strategies. We argue that condition differences between pot- and gillnet-caught cod may be driven by differences in behavioural traits. Consequently, fishing with a certain gear type may have ecological consequences affecting population characteristics, with implications for fisheries management. From the perspective of the seal–fisheries conflict, pots may ultimately have consequences on the catch value of fish. |
author2 |
Anderson, Emory |
format |
Article in Journal/Newspaper |
author |
Ljungberg, Peter Ovegård, Maria Öhman, Kristin Königson, Sara |
author_facet |
Ljungberg, Peter Ovegård, Maria Öhman, Kristin Königson, Sara |
author_sort |
Ljungberg, Peter |
title |
Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
title_short |
Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
title_full |
Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
title_fullStr |
Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
title_full_unstemmed |
Correlation between catch method, condition, and diet patterns in Atlantic cod (Gadus morhua) |
title_sort |
correlation between catch method, condition, and diet patterns in atlantic cod (gadus morhua) |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/icesjms/fsz167 http://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsz167/29810189/fsz167.pdf |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
ICES Journal of Marine Science ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsz167 |
container_title |
ICES Journal of Marine Science |
_version_ |
1766358042266304512 |