A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank
This study was designed to assess the dispersal of haddock (Melanogrammus aeglefinus) larvae from their Browns Bank spawning site in terms of either drift or retention mechanisms. Larvae were collected in comprehensive surveys of southwestern Nova Scotia conducted at monthly intervals through the wi...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1989
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Online Access: | http://dx.doi.org/10.1139/f89-281 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-281 |
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crcansciencepubl:10.1139/f89-281 2023-12-17T10:30:23+01:00 A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank Campana, Steven E. Smith, Stephen J. Hurley, Peter C. F. 1989 http://dx.doi.org/10.1139/f89-281 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-281 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue S1, page s93-s102 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1989 crcansciencepubl https://doi.org/10.1139/f89-281 2023-11-19T13:38:55Z This study was designed to assess the dispersal of haddock (Melanogrammus aeglefinus) larvae from their Browns Bank spawning site in terms of either drift or retention mechanisms. Larvae were collected in comprehensive surveys of southwestern Nova Scotia conducted at monthly intervals through the winter–spring of 1985. To avoid any confounding of larval displacement patterns by the numerically dominant young larvae, all spatial analyses were structured by age through otolith microstructure techniques. The results of a trend surface analysis indicated that both drift and retention processes operated in concert to split and disperse the larval population. Retention was probably physically based, through the action of a "leaky" gyre around Browns Bank. Although similar processes are believed to have influenced the distribution of Browns Bank cod (Gadus morhua) larvae, the interspecific difference in spawning time, coupled with the apparent instability of the gyre, produced a different balance between transported and retained larvae. A drift–retention dichotomy for Browns Bank ichthyoplankton has implications for both recruitment and stock structure studies. Article in Journal/Newspaper Gadus morhua Canadian Science Publishing (via Crossref) Browns ENVELOPE(-44.583,-44.583,-60.700,-60.700) Canadian Journal of Fisheries and Aquatic Sciences 46 S1 s93 s102 |
institution |
Open Polar |
collection |
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 Campana, Steven E. Smith, Stephen J. Hurley, Peter C. F. A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
This study was designed to assess the dispersal of haddock (Melanogrammus aeglefinus) larvae from their Browns Bank spawning site in terms of either drift or retention mechanisms. Larvae were collected in comprehensive surveys of southwestern Nova Scotia conducted at monthly intervals through the winter–spring of 1985. To avoid any confounding of larval displacement patterns by the numerically dominant young larvae, all spatial analyses were structured by age through otolith microstructure techniques. The results of a trend surface analysis indicated that both drift and retention processes operated in concert to split and disperse the larval population. Retention was probably physically based, through the action of a "leaky" gyre around Browns Bank. Although similar processes are believed to have influenced the distribution of Browns Bank cod (Gadus morhua) larvae, the interspecific difference in spawning time, coupled with the apparent instability of the gyre, produced a different balance between transported and retained larvae. A drift–retention dichotomy for Browns Bank ichthyoplankton has implications for both recruitment and stock structure studies. |
format |
Article in Journal/Newspaper |
author |
Campana, Steven E. Smith, Stephen J. Hurley, Peter C. F. |
author_facet |
Campana, Steven E. Smith, Stephen J. Hurley, Peter C. F. |
author_sort |
Campana, Steven E. |
title |
A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
title_short |
A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
title_full |
A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
title_fullStr |
A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
title_full_unstemmed |
A Drift–Retention Dichotomy for Larval Haddock ( Melanogrammus aeglefinus ) Spawned on Browns Bank |
title_sort |
drift–retention dichotomy for larval haddock ( melanogrammus aeglefinus ) spawned on browns bank |
publisher |
Canadian Science Publishing |
publishDate |
1989 |
url |
http://dx.doi.org/10.1139/f89-281 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-281 |
long_lat |
ENVELOPE(-44.583,-44.583,-60.700,-60.700) |
geographic |
Browns |
geographic_facet |
Browns |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue S1, page s93-s102 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f89-281 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
46 |
container_issue |
S1 |
container_start_page |
s93 |
op_container_end_page |
s102 |
_version_ |
1785583345374068736 |