Recruitment signals in juvenile cod surveys depend on thermal growth conditions
Coastal seine surveys contain some of the only direct measures of age-0 abundance for Atlantic cod (Gadus morhua) and Pacific cod (Gadus macrocephalus), yet their utility in forecasting future year-class strength has not been evaluated among regions. We analyzed coastal time series from the Gulf of...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2016-0035 2024-06-23T07:51:04+00:00 Recruitment signals in juvenile cod surveys depend on thermal growth conditions Laurel, Benjamin J. Cote, David Gregory, Robert S. Rogers, Lauren Knutsen, Halvor Olsen, Esben Moland 2017 http://dx.doi.org/10.1139/cjfas-2016-0035 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0035 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0035 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 4, page 511-523 ISSN 0706-652X 1205-7533 journal-article 2017 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0035 2024-05-30T08:13:48Z Coastal seine surveys contain some of the only direct measures of age-0 abundance for Atlantic cod (Gadus morhua) and Pacific cod (Gadus macrocephalus), yet their utility in forecasting future year-class strength has not been evaluated among regions. We analyzed coastal time series from the Gulf of Alaska, Newfoundland, and Norway to test the hypothesis that recruitment signals are stronger when assessed under thermal conditions that provide high juvenile growth potential. Weaker recruitment signals were associated with low growth potential from cold winters (Newfoundland) and recent warmer summers (Norway). We conclude that temperature-dependent growth strongly influences the utility of coastal surveys in recruitment forecasting among regions. Temporal changes in growth potential (e.g., via climate change) will likely affect recruitment signals by way of changes in juvenile mortality or spatial shifts to more favorable thermal habitats. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Alaska Canadian Science Publishing Gulf of Alaska Norway Pacific Canadian Journal of Fisheries and Aquatic Sciences 74 4 511 523 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Coastal seine surveys contain some of the only direct measures of age-0 abundance for Atlantic cod (Gadus morhua) and Pacific cod (Gadus macrocephalus), yet their utility in forecasting future year-class strength has not been evaluated among regions. We analyzed coastal time series from the Gulf of Alaska, Newfoundland, and Norway to test the hypothesis that recruitment signals are stronger when assessed under thermal conditions that provide high juvenile growth potential. Weaker recruitment signals were associated with low growth potential from cold winters (Newfoundland) and recent warmer summers (Norway). We conclude that temperature-dependent growth strongly influences the utility of coastal surveys in recruitment forecasting among regions. Temporal changes in growth potential (e.g., via climate change) will likely affect recruitment signals by way of changes in juvenile mortality or spatial shifts to more favorable thermal habitats. |
format |
Article in Journal/Newspaper |
author |
Laurel, Benjamin J. Cote, David Gregory, Robert S. Rogers, Lauren Knutsen, Halvor Olsen, Esben Moland |
spellingShingle |
Laurel, Benjamin J. Cote, David Gregory, Robert S. Rogers, Lauren Knutsen, Halvor Olsen, Esben Moland Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
author_facet |
Laurel, Benjamin J. Cote, David Gregory, Robert S. Rogers, Lauren Knutsen, Halvor Olsen, Esben Moland |
author_sort |
Laurel, Benjamin J. |
title |
Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
title_short |
Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
title_full |
Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
title_fullStr |
Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
title_full_unstemmed |
Recruitment signals in juvenile cod surveys depend on thermal growth conditions |
title_sort |
recruitment signals in juvenile cod surveys depend on thermal growth conditions |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0035 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0035 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0035 |
geographic |
Gulf of Alaska Norway Pacific |
geographic_facet |
Gulf of Alaska Norway Pacific |
genre |
atlantic cod Gadus morhua Newfoundland Alaska |
genre_facet |
atlantic cod Gadus morhua Newfoundland Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 4, page 511-523 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2016-0035 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
74 |
container_issue |
4 |
container_start_page |
511 |
op_container_end_page |
523 |
_version_ |
1802642070011117568 |