Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland
To understand coastal dispersal dynamics of Atlantic cod (Gadus morhua), we examined spatiotemporal egg and larval abundance patterns in coastal Newfoundland. In recent decades, Smith Sound, Trinity Bay has supported the largest known overwintering spawning aggregation of Atlantic cod in the region....
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ftrepec:oai:RePEc:plo:pone00:0075889 2024-04-14T08:08:51+00:00 Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland Ryan R E Stanley Brad deYoung Paul V R Snelgrove Robert S Gregory https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0075889 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0075889&type=printable unknown https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0075889 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0075889&type=printable article ftrepec 2024-03-19T10:31:20Z To understand coastal dispersal dynamics of Atlantic cod (Gadus morhua), we examined spatiotemporal egg and larval abundance patterns in coastal Newfoundland. In recent decades, Smith Sound, Trinity Bay has supported the largest known overwintering spawning aggregation of Atlantic cod in the region. We estimated spawning and dispersal characteristics for the Smith Sound-Trinity Bay system by fitting ichthyoplankton abundance data to environmentally-driven, simplified box models. Results show protracted spawning, with sharply increased egg production in early July, and limited dispersal from the Sound. The model for the entire spawning season indicates egg export from Smith Sound is 13%•day−1 with a net mortality of 27%•day–1. Eggs and larvae are consistently found in western Trinity Bay with little advection from the system. These patterns mirror particle tracking models that suggest residence times of 10–20 days, and circulation models indicating local gyres in Trinity Bay that act in concert with upwelling dynamics to retain eggs and larvae. Our results are among the first quantitative dispersal estimates from Smith Sound, linking this spawning stock to the adjacent coastal waters. These results illustrate the biophysical interplay regulating dispersal and connectivity originating from inshore spawning of coastal northwest Atlantic. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Northwest Atlantic Smith sound RePEc (Research Papers in Economics) Smith Sound ENVELOPE(-73.996,-73.996,78.419,78.419) |
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Open Polar |
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RePEc (Research Papers in Economics) |
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unknown |
description |
To understand coastal dispersal dynamics of Atlantic cod (Gadus morhua), we examined spatiotemporal egg and larval abundance patterns in coastal Newfoundland. In recent decades, Smith Sound, Trinity Bay has supported the largest known overwintering spawning aggregation of Atlantic cod in the region. We estimated spawning and dispersal characteristics for the Smith Sound-Trinity Bay system by fitting ichthyoplankton abundance data to environmentally-driven, simplified box models. Results show protracted spawning, with sharply increased egg production in early July, and limited dispersal from the Sound. The model for the entire spawning season indicates egg export from Smith Sound is 13%•day−1 with a net mortality of 27%•day–1. Eggs and larvae are consistently found in western Trinity Bay with little advection from the system. These patterns mirror particle tracking models that suggest residence times of 10–20 days, and circulation models indicating local gyres in Trinity Bay that act in concert with upwelling dynamics to retain eggs and larvae. Our results are among the first quantitative dispersal estimates from Smith Sound, linking this spawning stock to the adjacent coastal waters. These results illustrate the biophysical interplay regulating dispersal and connectivity originating from inshore spawning of coastal northwest Atlantic. |
format |
Article in Journal/Newspaper |
author |
Ryan R E Stanley Brad deYoung Paul V R Snelgrove Robert S Gregory |
spellingShingle |
Ryan R E Stanley Brad deYoung Paul V R Snelgrove Robert S Gregory Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
author_facet |
Ryan R E Stanley Brad deYoung Paul V R Snelgrove Robert S Gregory |
author_sort |
Ryan R E Stanley |
title |
Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
title_short |
Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
title_full |
Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
title_fullStr |
Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
title_full_unstemmed |
Factors Regulating Early Life History Dispersal of Atlantic Cod (Gadus morhua) from Coastal Newfoundland |
title_sort |
factors regulating early life history dispersal of atlantic cod (gadus morhua) from coastal newfoundland |
url |
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0075889 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0075889&type=printable |
long_lat |
ENVELOPE(-73.996,-73.996,78.419,78.419) |
geographic |
Smith Sound |
geographic_facet |
Smith Sound |
genre |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic Smith sound |
genre_facet |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic Smith sound |
op_relation |
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0075889 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0075889&type=printable |
_version_ |
1796306308660461568 |