Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks
Changes in diet of cod (Gadus morhua) with increasing size were similar in the southern Gulf of St. Lawrence, Sydney Bight, Banquereau, and Western and Emerald banks. Small cod fed mainly on crustaceans and changed to a fish diet as they grew larger. Differences in species taken within the food grou...
Published in: | Journal of the Fisheries Research Board of Canada |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1969
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f69-113 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-113 |
id |
crcansciencepubl:10.1139/f69-113 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f69-113 2023-12-17T10:30:23+01:00 Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks Kohler, A. C. Fitzgerald, D. N. 1969 http://dx.doi.org/10.1139/f69-113 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-113 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 26, issue 5, page 1273-1287 ISSN 0015-296X General Medicine journal-article 1969 crcansciencepubl https://doi.org/10.1139/f69-113 2023-11-19T13:39:06Z Changes in diet of cod (Gadus morhua) with increasing size were similar in the southern Gulf of St. Lawrence, Sydney Bight, Banquereau, and Western and Emerald banks. Small cod fed mainly on crustaceans and changed to a fish diet as they grew larger. Differences in species taken within the food groups seemed to depend on relative availability of the prey species. When cod reached sizes (ca. 50 cm) where they subsisted mainly on a fish diet, their main prey in the Gulf of St. Lawrence was herring (Clupea harengus) and on the Nova Scotia Banks it was sand launce (Ammodytes americanus). There were some seasonal differences in food eaten within areas and by depth.In the Western and Emerald bank areas, cod stomachs contained more food than haddock (Melanogrammus aeglefinus), up to two or three times as much for the large size-groups. Cod generally fed more heavily on pelagic crustaceans and fish whereas haddock took benthic animals, including annelid worms, molluscs, and echinoderms. When pelagic prey, particularly fish, were available to cod, there was the least overlap in food species taken by cod and haddock in the same area. Article in Journal/Newspaper Gadus morhua Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 26 5 1273 1287 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine Kohler, A. C. Fitzgerald, D. N. Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
topic_facet |
General Medicine |
description |
Changes in diet of cod (Gadus morhua) with increasing size were similar in the southern Gulf of St. Lawrence, Sydney Bight, Banquereau, and Western and Emerald banks. Small cod fed mainly on crustaceans and changed to a fish diet as they grew larger. Differences in species taken within the food groups seemed to depend on relative availability of the prey species. When cod reached sizes (ca. 50 cm) where they subsisted mainly on a fish diet, their main prey in the Gulf of St. Lawrence was herring (Clupea harengus) and on the Nova Scotia Banks it was sand launce (Ammodytes americanus). There were some seasonal differences in food eaten within areas and by depth.In the Western and Emerald bank areas, cod stomachs contained more food than haddock (Melanogrammus aeglefinus), up to two or three times as much for the large size-groups. Cod generally fed more heavily on pelagic crustaceans and fish whereas haddock took benthic animals, including annelid worms, molluscs, and echinoderms. When pelagic prey, particularly fish, were available to cod, there was the least overlap in food species taken by cod and haddock in the same area. |
format |
Article in Journal/Newspaper |
author |
Kohler, A. C. Fitzgerald, D. N. |
author_facet |
Kohler, A. C. Fitzgerald, D. N. |
author_sort |
Kohler, A. C. |
title |
Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
title_short |
Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
title_full |
Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
title_fullStr |
Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
title_full_unstemmed |
Comparisons of Food of Cod and Haddock in the Gulf of St. Lawrence and on the Nova Scotia Banks |
title_sort |
comparisons of food of cod and haddock in the gulf of st. lawrence and on the nova scotia banks |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/f69-113 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-113 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of the Fisheries Research Board of Canada volume 26, issue 5, page 1273-1287 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f69-113 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
26 |
container_issue |
5 |
container_start_page |
1273 |
op_container_end_page |
1287 |
_version_ |
1785583351772479488 |