Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA
Atlantic cod Gadus morhua in US waters are currently managed as 2 stocks: (1) a Gulf of Maine stock and (2) a Georges Bank and south stock. This designation is decades old and warrants re-evaluation in light of concerns that fisheries management units may not reflect biologically meaningful populati...
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ftuninhampshire:oai:scholars.unh.edu:nhaes-1138 2024-09-15T17:55:24+00:00 Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA Kovach, Adrienne I. Breton, Timothy S. Berlinsky, David L. Maceda, Lorraine Wirgin, Isaac 2010-01-01T08:00:00Z https://scholars.unh.edu/nhaes/139 https://doi.org/10.3354/meps08612 unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/nhaes/139 doi:10.3354/meps08612 http://dx.doi.org/10.3354/meps08612 © Inter-Research 2010 New Hampshire Agricultural Experiment Station Publications Scientific Contribution Number 2428 Ecology and Evolutionary Biology text 2010 ftuninhampshire https://doi.org/10.3354/meps08612 2024-08-02T04:50:30Z Atlantic cod Gadus morhua in US waters are currently managed as 2 stocks: (1) a Gulf of Maine stock and (2) a Georges Bank and south stock. This designation is decades old and warrants re-evaluation in light of concerns that fisheries management units may not reflect biologically meaningful population units. In this study, we used 10 microsatellite loci, the PanI locus, and 5 single nucleotide polymorphism markers to characterize the population genetic structure of cod in US waters. We found significant differentiation among temporally and spatially divergent populations of cod (global F(ST) = 0.0044), primarily stemming from 2 potentially non-neutral loci, and evidence for a population structure that strongly contradicts the current 2-stock management model. This genetic structure was stable over a 5 yr period. Our results indicate that cod in US waters are broadly structured into 3 groups: (1) a northern spring-spawning coastal complex in the Gulf of Maine (GOM), (2) a southern complex consisting of winter-spawning inshore GOM, offshore GOM and sites south of Cape Cod, Massachusetts, and (3) a Georges Bank population. The strongest differentiation occurs between populations in the northern and southern complex (mean F(ST) = 0.0085), some of which spawn in the same bays in different seasons. By means of mixture analysis, young-of-the-year fish sampled on juvenile nurseries were assigned to the spawning complex of their origin. Our findings contribute to a growing body of knowledge that Atlantic cod and other marine fish populations are structured on a finer scale than previously thought and that this structure supports biocomplexity and locally adapted populations. As such, it may be warranted to re-evaluate current management units and tailor management plans toward this finer scale. Text atlantic cod Gadus morhua University of New Hampshire: Scholars Repository Marine Ecology Progress Series 410 177 195 |
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University of New Hampshire: Scholars Repository |
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Scientific Contribution Number 2428 Ecology and Evolutionary Biology |
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Scientific Contribution Number 2428 Ecology and Evolutionary Biology Kovach, Adrienne I. Breton, Timothy S. Berlinsky, David L. Maceda, Lorraine Wirgin, Isaac Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
topic_facet |
Scientific Contribution Number 2428 Ecology and Evolutionary Biology |
description |
Atlantic cod Gadus morhua in US waters are currently managed as 2 stocks: (1) a Gulf of Maine stock and (2) a Georges Bank and south stock. This designation is decades old and warrants re-evaluation in light of concerns that fisheries management units may not reflect biologically meaningful population units. In this study, we used 10 microsatellite loci, the PanI locus, and 5 single nucleotide polymorphism markers to characterize the population genetic structure of cod in US waters. We found significant differentiation among temporally and spatially divergent populations of cod (global F(ST) = 0.0044), primarily stemming from 2 potentially non-neutral loci, and evidence for a population structure that strongly contradicts the current 2-stock management model. This genetic structure was stable over a 5 yr period. Our results indicate that cod in US waters are broadly structured into 3 groups: (1) a northern spring-spawning coastal complex in the Gulf of Maine (GOM), (2) a southern complex consisting of winter-spawning inshore GOM, offshore GOM and sites south of Cape Cod, Massachusetts, and (3) a Georges Bank population. The strongest differentiation occurs between populations in the northern and southern complex (mean F(ST) = 0.0085), some of which spawn in the same bays in different seasons. By means of mixture analysis, young-of-the-year fish sampled on juvenile nurseries were assigned to the spawning complex of their origin. Our findings contribute to a growing body of knowledge that Atlantic cod and other marine fish populations are structured on a finer scale than previously thought and that this structure supports biocomplexity and locally adapted populations. As such, it may be warranted to re-evaluate current management units and tailor management plans toward this finer scale. |
format |
Text |
author |
Kovach, Adrienne I. Breton, Timothy S. Berlinsky, David L. Maceda, Lorraine Wirgin, Isaac |
author_facet |
Kovach, Adrienne I. Breton, Timothy S. Berlinsky, David L. Maceda, Lorraine Wirgin, Isaac |
author_sort |
Kovach, Adrienne I. |
title |
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
title_short |
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
title_full |
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
title_fullStr |
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
title_full_unstemmed |
Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA |
title_sort |
fine-scale spatial and temporal genetic structure of atlantic cod off the atlantic coast of the usa |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2010 |
url |
https://scholars.unh.edu/nhaes/139 https://doi.org/10.3354/meps08612 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
New Hampshire Agricultural Experiment Station Publications |
op_relation |
https://scholars.unh.edu/nhaes/139 doi:10.3354/meps08612 http://dx.doi.org/10.3354/meps08612 |
op_rights |
© Inter-Research 2010 |
op_doi |
https://doi.org/10.3354/meps08612 |
container_title |
Marine Ecology Progress Series |
container_volume |
410 |
container_start_page |
177 |
op_container_end_page |
195 |
_version_ |
1810431687366017024 |