Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding
Rebuilding the Gulf of Maine stock of Atlantic cod ( Gadus morhua ) has been much slower than expected. An important source of scientific uncertainty contributing to the difficulties in managing rebuilding has been the lack of understanding of cod population structure. Previous research indicates th...
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fthighwire:oai:open-archive.highwire.org:icesjms:71/6/1356 2023-05-15T15:27:05+02:00 Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding Zemeckis, Douglas R. Hoffman, William S. Dean, Micah J. Armstrong, Michael P. Cadrin, Steven X. 2014-09-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/71/6/1356 https://doi.org/10.1093/icesjms/fsu117 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/71/6/1356 http://dx.doi.org/10.1093/icesjms/fsu117 Copyright (C) 2014, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Original Articles TEXT 2014 fthighwire https://doi.org/10.1093/icesjms/fsu117 2015-02-28T22:23:02Z Rebuilding the Gulf of Maine stock of Atlantic cod ( Gadus morhua ) has been much slower than expected. An important source of scientific uncertainty contributing to the difficulties in managing rebuilding has been the lack of understanding of cod population structure. Previous research indicates that the stock functions as a metapopulation that is made up of multiple subpopulations and many finer-scale spawning components. This study investigated fine-scale, multiyear spawning site fidelity by a spring-spawning component of Atlantic cod in the western Gulf of Maine. Movements of acoustically tagged cod ( n = 63) with respect to a known spawning site were tracked using passive acoustic telemetry. A large proportion (38–67%) of tagged cod exhibited spawning site fidelity between 2010 and 2012. After adjusting for fishing mortality, natural mortality, and skipped spawning, the estimated rate of spawning site fidelity ranged between 47 and 95% in 2011. Multiyear spawning site fidelity was also observed, with individuals being tracked for up to four consecutive spawning seasons. Spawning site fidelity serves as one of the multiple mechanisms that contribute to the formation and maintenance of the observed metapopulation structure. Spawning site fidelity also reduces the reproductive connectivity among spawning sites, thus delaying both recolonization of abandoned spawning sites and stock rebuilding. Future stock assessment models and fishery management plans that incorporate the metapopulation structure of cod in the Gulf of Maine are expected to be more effective at preventing continued declines in spawning diversity and promoting rebuilding. Text atlantic cod Gadus morhua HighWire Press (Stanford University) ICES Journal of Marine Science 71 6 1356 1365 |
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Original Articles Zemeckis, Douglas R. Hoffman, William S. Dean, Micah J. Armstrong, Michael P. Cadrin, Steven X. Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
topic_facet |
Original Articles |
description |
Rebuilding the Gulf of Maine stock of Atlantic cod ( Gadus morhua ) has been much slower than expected. An important source of scientific uncertainty contributing to the difficulties in managing rebuilding has been the lack of understanding of cod population structure. Previous research indicates that the stock functions as a metapopulation that is made up of multiple subpopulations and many finer-scale spawning components. This study investigated fine-scale, multiyear spawning site fidelity by a spring-spawning component of Atlantic cod in the western Gulf of Maine. Movements of acoustically tagged cod ( n = 63) with respect to a known spawning site were tracked using passive acoustic telemetry. A large proportion (38–67%) of tagged cod exhibited spawning site fidelity between 2010 and 2012. After adjusting for fishing mortality, natural mortality, and skipped spawning, the estimated rate of spawning site fidelity ranged between 47 and 95% in 2011. Multiyear spawning site fidelity was also observed, with individuals being tracked for up to four consecutive spawning seasons. Spawning site fidelity serves as one of the multiple mechanisms that contribute to the formation and maintenance of the observed metapopulation structure. Spawning site fidelity also reduces the reproductive connectivity among spawning sites, thus delaying both recolonization of abandoned spawning sites and stock rebuilding. Future stock assessment models and fishery management plans that incorporate the metapopulation structure of cod in the Gulf of Maine are expected to be more effective at preventing continued declines in spawning diversity and promoting rebuilding. |
format |
Text |
author |
Zemeckis, Douglas R. Hoffman, William S. Dean, Micah J. Armstrong, Michael P. Cadrin, Steven X. |
author_facet |
Zemeckis, Douglas R. Hoffman, William S. Dean, Micah J. Armstrong, Michael P. Cadrin, Steven X. |
author_sort |
Zemeckis, Douglas R. |
title |
Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
title_short |
Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
title_full |
Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
title_fullStr |
Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
title_full_unstemmed |
Spawning site fidelity by Atlantic cod (Gadus morhua) in the Gulf of Maine: implications for population structure and rebuilding |
title_sort |
spawning site fidelity by atlantic cod (gadus morhua) in the gulf of maine: implications for population structure and rebuilding |
publisher |
Oxford University Press |
publishDate |
2014 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/71/6/1356 https://doi.org/10.1093/icesjms/fsu117 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/71/6/1356 http://dx.doi.org/10.1093/icesjms/fsu117 |
op_rights |
Copyright (C) 2014, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsu117 |
container_title |
ICES Journal of Marine Science |
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71 |
container_issue |
6 |
container_start_page |
1356 |
op_container_end_page |
1365 |
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1766357542481428480 |