Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level
A large spawning aggregation of northern Atlantic cod (Gadus morhua) was discovered in a fjord of Trinity Bay, Newfoundland, in April 1995, 3 years after the collapse of this stock and 1 year after the last offshore spawning aggregation was recorded. We hypothesized that spawning by this aggregation...
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1998
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crcansciencepubl:10.1139/f98-115 2023-12-17T10:27:01+01:00 Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level Smedbol, R K Schneider, D C Wroblewski, J S Methven, D A 1998 http://dx.doi.org/10.1139/f98-115 http://www.nrcresearchpress.com/doi/pdf/10.1139/f98-115 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 10, page 2283-2291 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1998 crcansciencepubl https://doi.org/10.1139/f98-115 2023-11-19T13:39:03Z A large spawning aggregation of northern Atlantic cod (Gadus morhua) was discovered in a fjord of Trinity Bay, Newfoundland, in April 1995, 3 years after the collapse of this stock and 1 year after the last offshore spawning aggregation was recorded. We hypothesized that spawning by this aggregation would increase the abundance/density of eggs and settled 0-group juveniles above the level of spawning in the bay during recent years. Data from 1995 were compared with ichthyoplankton and postsettlement juvenile surveys conducted in recent years. Egg density was significantly higher in 1995 than the pooled average of two recent years (1991 and 1993). The hypothesized increase in numbers of postsettlement age 0 fish was tested at three different spatial scales: the entire northeast coast of Newfoundland, individual bays, and areas within Trinity Bay. There was no detectable increase in catches of settled age 0 juveniles at any spatial scale. Consequently, while this large spawning aggregation produced locally high egg concentrations, it did not lead to a detectable increase in abundance of newly settled age 0 juveniles in coastal nursery areas. This study did not provide any direct evidence for an increase in recruitment in the inshore region due to the spawning output of locally abundant spawners in Trinity Bay. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 55 10 2283 2291 |
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 Smedbol, R K Schneider, D C Wroblewski, J S Methven, D A Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
A large spawning aggregation of northern Atlantic cod (Gadus morhua) was discovered in a fjord of Trinity Bay, Newfoundland, in April 1995, 3 years after the collapse of this stock and 1 year after the last offshore spawning aggregation was recorded. We hypothesized that spawning by this aggregation would increase the abundance/density of eggs and settled 0-group juveniles above the level of spawning in the bay during recent years. Data from 1995 were compared with ichthyoplankton and postsettlement juvenile surveys conducted in recent years. Egg density was significantly higher in 1995 than the pooled average of two recent years (1991 and 1993). The hypothesized increase in numbers of postsettlement age 0 fish was tested at three different spatial scales: the entire northeast coast of Newfoundland, individual bays, and areas within Trinity Bay. There was no detectable increase in catches of settled age 0 juveniles at any spatial scale. Consequently, while this large spawning aggregation produced locally high egg concentrations, it did not lead to a detectable increase in abundance of newly settled age 0 juveniles in coastal nursery areas. This study did not provide any direct evidence for an increase in recruitment in the inshore region due to the spawning output of locally abundant spawners in Trinity Bay. |
format |
Article in Journal/Newspaper |
author |
Smedbol, R K Schneider, D C Wroblewski, J S Methven, D A |
author_facet |
Smedbol, R K Schneider, D C Wroblewski, J S Methven, D A |
author_sort |
Smedbol, R K |
title |
Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
title_short |
Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
title_full |
Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
title_fullStr |
Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
title_full_unstemmed |
Outcome of an inshore spawning event by northern Atlantic cod ( Gadus morhua ) at a low stock level |
title_sort |
outcome of an inshore spawning event by northern atlantic cod ( gadus morhua ) at a low stock level |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/f98-115 http://www.nrcresearchpress.com/doi/pdf/10.1139/f98-115 |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 10, page 2283-2291 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f98-115 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
55 |
container_issue |
10 |
container_start_page |
2283 |
op_container_end_page |
2291 |
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1785578798140358656 |