THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS
The haddock's range in North American waters is divided by the Fundian and Laurentian channels (both over 185 metres deep) into the "New England", "Nova Scotian" and "Newfoundland" regions. Marking experiments and comparisons of the age composition of stocks and of...
Published in: | Contributions to Canadian Biology and Fisheries |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1931
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Online Access: | http://dx.doi.org/10.1139/f31-010 http://www.nrcresearchpress.com/doi/pdf/10.1139/f31-010 |
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crcansciencepubl:10.1139/f31-010 2023-12-17T10:44:59+01:00 THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS NEEDLER, A. W. H. 1931 http://dx.doi.org/10.1139/f31-010 http://www.nrcresearchpress.com/doi/pdf/10.1139/f31-010 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Contributions to Canadian Biology and Fisheries volume 6, issue 1, page 241-313 ISSN 0366-5348 General Earth and Planetary Sciences General Engineering General Environmental Science journal-article 1931 crcansciencepubl https://doi.org/10.1139/f31-010 2023-11-19T13:39:23Z The haddock's range in North American waters is divided by the Fundian and Laurentian channels (both over 185 metres deep) into the "New England", "Nova Scotian" and "Newfoundland" regions. Marking experiments and comparisons of the age composition of stocks and of the growth rates show that there is practically no interchange between the first two. To the haddock, which are bottom-loving fish and never abundant below 185 metres (100 fathoms), the channels are barriers producing three divisions of the population corresponding to the divisions of the shallow water area. Seasonal migrations are shown in both the New England and Nova Scotian regions. Haddock withdraw in winter from areas north of Halifax and large haddock migrate into the gulf of St. Lawrence each summer. In midwinter the catches are chiefly below 70 metres (40 fathoms); in spring and early summer haddock appear well inshore in shallow water; in late summer they withdraw to deeper water; in late autumn they are caught in a great range of depths leaving the shallower parts as winter approaches. Both horizontal and vertical movements are correlated with temperatures—haddock avoiding those near 0 °C. and 11 °C. and preferring intermediate temperatures. Prior to maturity the haddock are relatively stationary becoming increasingly active in seasonal migration thereafter and changing their distribution—e.g., older haddock accumulate in the eastern part of the Nova Scotian region. The New England and Nova Scotian populations are groups of more or less distinct smaller units. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Contributions to Canadian Biology and Fisheries 6 1 241 313 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Engineering General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Engineering General Environmental Science NEEDLER, A. W. H. THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
topic_facet |
General Earth and Planetary Sciences General Engineering General Environmental Science |
description |
The haddock's range in North American waters is divided by the Fundian and Laurentian channels (both over 185 metres deep) into the "New England", "Nova Scotian" and "Newfoundland" regions. Marking experiments and comparisons of the age composition of stocks and of the growth rates show that there is practically no interchange between the first two. To the haddock, which are bottom-loving fish and never abundant below 185 metres (100 fathoms), the channels are barriers producing three divisions of the population corresponding to the divisions of the shallow water area. Seasonal migrations are shown in both the New England and Nova Scotian regions. Haddock withdraw in winter from areas north of Halifax and large haddock migrate into the gulf of St. Lawrence each summer. In midwinter the catches are chiefly below 70 metres (40 fathoms); in spring and early summer haddock appear well inshore in shallow water; in late summer they withdraw to deeper water; in late autumn they are caught in a great range of depths leaving the shallower parts as winter approaches. Both horizontal and vertical movements are correlated with temperatures—haddock avoiding those near 0 °C. and 11 °C. and preferring intermediate temperatures. Prior to maturity the haddock are relatively stationary becoming increasingly active in seasonal migration thereafter and changing their distribution—e.g., older haddock accumulate in the eastern part of the Nova Scotian region. The New England and Nova Scotian populations are groups of more or less distinct smaller units. |
format |
Article in Journal/Newspaper |
author |
NEEDLER, A. W. H. |
author_facet |
NEEDLER, A. W. H. |
author_sort |
NEEDLER, A. W. H. |
title |
THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
title_short |
THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
title_full |
THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
title_fullStr |
THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
title_full_unstemmed |
THE MIGRATIONS OF HADDOCK AND THE INTERRELATIONSHIPS OF HADDOCK POPULATIONS IN NORTH AMERICAN WATERS |
title_sort |
migrations of haddock and the interrelationships of haddock populations in north american waters |
publisher |
Canadian Science Publishing |
publishDate |
1931 |
url |
http://dx.doi.org/10.1139/f31-010 http://www.nrcresearchpress.com/doi/pdf/10.1139/f31-010 |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Midwinter |
geographic_facet |
Midwinter |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Contributions to Canadian Biology and Fisheries volume 6, issue 1, page 241-313 ISSN 0366-5348 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f31-010 |
container_title |
Contributions to Canadian Biology and Fisheries |
container_volume |
6 |
container_issue |
1 |
container_start_page |
241 |
op_container_end_page |
313 |
_version_ |
1785564643983360000 |