Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic
We analyzed 47 yr (1946–92) of research trawl data and 5 yr (1964–68) of research gillnet data to identify spawning locations of Atlantic cod, Gadus morhua, in the Newfoundland–Labrador region. Offshore, spawners are common on the continental shelf but generally rare on the slope. Relative abundance...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1993
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f93-270 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-270 |
id |
crcansciencepubl:10.1139/f93-270 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f93-270 2023-12-17T10:27:01+01:00 Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic Hutchings, Jeffrey A. Myers, Ransom A. Lilly, George R. 1993 http://dx.doi.org/10.1139/f93-270 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-270 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 11, page 2457-2467 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1993 crcansciencepubl https://doi.org/10.1139/f93-270 2023-11-19T13:38:48Z We analyzed 47 yr (1946–92) of research trawl data and 5 yr (1964–68) of research gillnet data to identify spawning locations of Atlantic cod, Gadus morhua, in the Newfoundland–Labrador region. Offshore, spawners are common on the continental shelf but generally rare on the slope. Relative abundance of spawning individuals on the shelf is comparably high off northeast Newfoundland, within 100 km of the Newfoundland coast from Cape Freels to Cape Race, on central Grand Bank, and on St. Pierre Bank. Slope spawning is largely restricted to the eastern slope of Hamilton Bank, a small section of northern Grand Bank, and Flemish Cap. Inshore spawning is evident in southeastern Labrador and southeastern Newfoundland, particularly in St. Mary's, Placentia, Trinity, and Bonavista bays. Trajectories of satellite-tracked drifter buoys indicate that it is highly improbable that eggs spawned on the slope of Grand Bank and much of the northeastern Newfoundland slope will be transported into shelf and coastal waters. We conclude that cod spawn in areas in which their eggs and larvae are likely to be retained and that inshore spawning populations may provide a considerably larger contribution to cod recruitment in coastal Newfoundland than has previously been believed. Article in Journal/Newspaper atlantic cod Gadus morhua Labrador region Newfoundland Northwest Atlantic Canadian Science Publishing (via Crossref) Newfoundland Hamilton Bank ENVELOPE(-54.156,-54.156,53.309,53.309) Canadian Journal of Fisheries and Aquatic Sciences 50 11 2457 2467 |
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 Hutchings, Jeffrey A. Myers, Ransom A. Lilly, George R. Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We analyzed 47 yr (1946–92) of research trawl data and 5 yr (1964–68) of research gillnet data to identify spawning locations of Atlantic cod, Gadus morhua, in the Newfoundland–Labrador region. Offshore, spawners are common on the continental shelf but generally rare on the slope. Relative abundance of spawning individuals on the shelf is comparably high off northeast Newfoundland, within 100 km of the Newfoundland coast from Cape Freels to Cape Race, on central Grand Bank, and on St. Pierre Bank. Slope spawning is largely restricted to the eastern slope of Hamilton Bank, a small section of northern Grand Bank, and Flemish Cap. Inshore spawning is evident in southeastern Labrador and southeastern Newfoundland, particularly in St. Mary's, Placentia, Trinity, and Bonavista bays. Trajectories of satellite-tracked drifter buoys indicate that it is highly improbable that eggs spawned on the slope of Grand Bank and much of the northeastern Newfoundland slope will be transported into shelf and coastal waters. We conclude that cod spawn in areas in which their eggs and larvae are likely to be retained and that inshore spawning populations may provide a considerably larger contribution to cod recruitment in coastal Newfoundland than has previously been believed. |
format |
Article in Journal/Newspaper |
author |
Hutchings, Jeffrey A. Myers, Ransom A. Lilly, George R. |
author_facet |
Hutchings, Jeffrey A. Myers, Ransom A. Lilly, George R. |
author_sort |
Hutchings, Jeffrey A. |
title |
Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
title_short |
Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
title_full |
Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
title_fullStr |
Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
title_full_unstemmed |
Geographic Variation in the Spawning of Atlantic Cod, Gadus morhua , in the Northwest Atlantic |
title_sort |
geographic variation in the spawning of atlantic cod, gadus morhua , in the northwest atlantic |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/f93-270 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-270 |
long_lat |
ENVELOPE(-54.156,-54.156,53.309,53.309) |
geographic |
Newfoundland Hamilton Bank |
geographic_facet |
Newfoundland Hamilton Bank |
genre |
atlantic cod Gadus morhua Labrador region Newfoundland Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Labrador region Newfoundland Northwest Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 11, page 2457-2467 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f93-270 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
50 |
container_issue |
11 |
container_start_page |
2457 |
op_container_end_page |
2467 |
_version_ |
1785578792547254272 |