The drift-retention dichotomy on Browns Bank: a model study of interannual variability
Interannual variability in drift and retention in the Browns Bank region in spring was investigated by tracking particles in numerical-model estimates of the seasonal mean circulation and monthly mean flow anomalies computed using wind and sea-level data. The circulation changes associated with the...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2000
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Online Access: | http://dx.doi.org/10.1139/f00-234 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-234 |
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crcansciencepubl:10.1139/f00-234 2024-04-28T08:13:02+00:00 The drift-retention dichotomy on Browns Bank: a model study of interannual variability Hannah, Charles G Shore, Jennifer A Loder, John W 2000 http://dx.doi.org/10.1139/f00-234 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-234 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 12, page 2506-2518 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2000 crcansciencepubl https://doi.org/10.1139/f00-234 2024-04-09T06:56:28Z Interannual variability in drift and retention in the Browns Bank region in spring was investigated by tracking particles in numerical-model estimates of the seasonal mean circulation and monthly mean flow anomalies computed using wind and sea-level data. The circulation changes associated with the variable forcing tend to reinforce either drift to the Bay of Fundy or retention in the vicinity of Browns Bank. Regular spring spawning can lead to widely different distributions of 1-month-old larvae, supporting the concept of a drift-retention dichotomy for Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) larvae in the region. Analysis of interannual variability indicates that retention has bounded properties that must be accounted for when relating retention variability to forcing indices. As well, the nonlinearities associated with calculating particle trajectories from velocity fields contribute about 10% of the variance in retention indices. Comparison with biologically based indices of haddock survival indicates that circulation variability alone is not the dominant influence on survival to ages 1 and 2 years. However, it can be expected to have a significant influence in conjunction with biological factors such as the location and timing of peak spawning and the variable vertical position of eggs and larvae. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 57 12 2506 2518 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Hannah, Charles G Shore, Jennifer A Loder, John W The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Interannual variability in drift and retention in the Browns Bank region in spring was investigated by tracking particles in numerical-model estimates of the seasonal mean circulation and monthly mean flow anomalies computed using wind and sea-level data. The circulation changes associated with the variable forcing tend to reinforce either drift to the Bay of Fundy or retention in the vicinity of Browns Bank. Regular spring spawning can lead to widely different distributions of 1-month-old larvae, supporting the concept of a drift-retention dichotomy for Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) larvae in the region. Analysis of interannual variability indicates that retention has bounded properties that must be accounted for when relating retention variability to forcing indices. As well, the nonlinearities associated with calculating particle trajectories from velocity fields contribute about 10% of the variance in retention indices. Comparison with biologically based indices of haddock survival indicates that circulation variability alone is not the dominant influence on survival to ages 1 and 2 years. However, it can be expected to have a significant influence in conjunction with biological factors such as the location and timing of peak spawning and the variable vertical position of eggs and larvae. |
format |
Article in Journal/Newspaper |
author |
Hannah, Charles G Shore, Jennifer A Loder, John W |
author_facet |
Hannah, Charles G Shore, Jennifer A Loder, John W |
author_sort |
Hannah, Charles G |
title |
The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
title_short |
The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
title_full |
The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
title_fullStr |
The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
title_full_unstemmed |
The drift-retention dichotomy on Browns Bank: a model study of interannual variability |
title_sort |
drift-retention dichotomy on browns bank: a model study of interannual variability |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/f00-234 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-234 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 12, page 2506-2518 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f00-234 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
57 |
container_issue |
12 |
container_start_page |
2506 |
op_container_end_page |
2518 |
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1797579697921458176 |