Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador
Juvenile mortality is an important factor affecting the spatiotemporal dynamics of fish recruitment, but estimation of the spatiotemporal variations in juvenile mortality rates remains challenging. We developed a state-space metapopulation dynamics model to simultaneously estimate spatiotemporal var...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2019-0156 2023-12-17T10:27:01+01:00 Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador Zhang, Fan Rideout, Rick M. Cadigan, Noel G. 2020 http://dx.doi.org/10.1139/cjfas-2019-0156 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0156 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0156 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 3, page 625-635 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2020 crcansciencepubl https://doi.org/10.1139/cjfas-2019-0156 2023-11-19T13:38:57Z Juvenile mortality is an important factor affecting the spatiotemporal dynamics of fish recruitment, but estimation of the spatiotemporal variations in juvenile mortality rates remains challenging. We developed a state-space metapopulation dynamics model to simultaneously estimate spatiotemporal variations in juvenile mortality rates and cohort strength and applied this general modelling framework to data from multiple surveys for juvenile (ages 2–5) Atlantic cod (Gadus morhua) stocks off Newfoundland and Labrador (NL). We found large-scale synchronized dynamics of decreasing juvenile mortality rates and increasing cohort strength from offshore surveys off eastern and southeastern NL, suggesting improving reproduction and survival rates for juvenile cod. No synchronized patterns of juvenile mortality rates and cohort strength were detected for cod stocks off southern and western NL, indicating more complex cod population spatial structures in those areas. Our study demonstrates the potential of juvenile mortality to cause temporally variable and spatially synchronized dynamics of fish recruitment, and the spatial patterns of juvenile mortality and cohort strength indicate some potential mismatch between cod population structure and current management units off NL. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Canadian Science Publishing (via Crossref) Newfoundland Canadian Journal of Fisheries and Aquatic Sciences 77 3 625 635 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Zhang, Fan Rideout, Rick M. Cadigan, Noel G. Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Juvenile mortality is an important factor affecting the spatiotemporal dynamics of fish recruitment, but estimation of the spatiotemporal variations in juvenile mortality rates remains challenging. We developed a state-space metapopulation dynamics model to simultaneously estimate spatiotemporal variations in juvenile mortality rates and cohort strength and applied this general modelling framework to data from multiple surveys for juvenile (ages 2–5) Atlantic cod (Gadus morhua) stocks off Newfoundland and Labrador (NL). We found large-scale synchronized dynamics of decreasing juvenile mortality rates and increasing cohort strength from offshore surveys off eastern and southeastern NL, suggesting improving reproduction and survival rates for juvenile cod. No synchronized patterns of juvenile mortality rates and cohort strength were detected for cod stocks off southern and western NL, indicating more complex cod population spatial structures in those areas. Our study demonstrates the potential of juvenile mortality to cause temporally variable and spatially synchronized dynamics of fish recruitment, and the spatial patterns of juvenile mortality and cohort strength indicate some potential mismatch between cod population structure and current management units off NL. |
format |
Article in Journal/Newspaper |
author |
Zhang, Fan Rideout, Rick M. Cadigan, Noel G. |
author_facet |
Zhang, Fan Rideout, Rick M. Cadigan, Noel G. |
author_sort |
Zhang, Fan |
title |
Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
title_short |
Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
title_full |
Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
title_fullStr |
Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
title_full_unstemmed |
Spatiotemporal variations in juvenile mortality and cohort strength of Atlantic cod ( Gadus morhua ) off Newfoundland and Labrador |
title_sort |
spatiotemporal variations in juvenile mortality and cohort strength of atlantic cod ( gadus morhua ) off newfoundland and labrador |
publisher |
Canadian Science Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1139/cjfas-2019-0156 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0156 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0156 |
geographic |
Newfoundland |
geographic_facet |
Newfoundland |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 3, page 625-635 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2019-0156 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
77 |
container_issue |
3 |
container_start_page |
625 |
op_container_end_page |
635 |
_version_ |
1785578778506821632 |