Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada
Morphological characteristics of the first larval stage of the American lobster (Homarus americanus) enabled the separation of the Maritime population with stepwise discriminant function analysis into three groups: the southern Gulf of St. Lawrence and its outflow around Cape Breton Island, the Atla...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1993
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Online Access: | http://dx.doi.org/10.1139/f93-005 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-005 |
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crcansciencepubl:10.1139/f93-005 2024-05-19T07:38:30+00:00 Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada Harding, Gareth Kenchington, Ellen Zheng, Zhensui 1993 http://dx.doi.org/10.1139/f93-005 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-005 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 1, page 43-52 ISSN 0706-652X 1205-7533 journal-article 1993 crcansciencepubl https://doi.org/10.1139/f93-005 2024-05-02T06:51:27Z Morphological characteristics of the first larval stage of the American lobster (Homarus americanus) enabled the separation of the Maritime population with stepwise discriminant function analysis into three groups: the southern Gulf of St. Lawrence and its outflow around Cape Breton Island, the Atlantic inshore region of Nova Scotia, and the offshore banks bordering the Gulf of Maine. Once the effect of environmental temperature on larval size was removed, the differences between Georges and Browns banks and the Atlantic inshore disappeared. The remaining differences, chiefly in the dimensions of the second and fifth abdominal segments and the rostrum, between larvae from the Cape Breton sites and elsewhere may be due to other environmental factors or partial genetic isolation. Conservation and management practices over the past century have increased gene flow between regions, and most of this appears to be from the release of Gulf of St. Lawrence lobsters in the Gulf of Maine. A reassessment of previous studies on adult morphology, benthic movements, larval dispersal, enzyme electrophoresis, and commercial landing patterns supports the separation of the Gulf of St. Lawrence stock from the rest of the Canadian Maritimes. Article in Journal/Newspaper Breton Island Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 50 1 43 52 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Morphological characteristics of the first larval stage of the American lobster (Homarus americanus) enabled the separation of the Maritime population with stepwise discriminant function analysis into three groups: the southern Gulf of St. Lawrence and its outflow around Cape Breton Island, the Atlantic inshore region of Nova Scotia, and the offshore banks bordering the Gulf of Maine. Once the effect of environmental temperature on larval size was removed, the differences between Georges and Browns banks and the Atlantic inshore disappeared. The remaining differences, chiefly in the dimensions of the second and fifth abdominal segments and the rostrum, between larvae from the Cape Breton sites and elsewhere may be due to other environmental factors or partial genetic isolation. Conservation and management practices over the past century have increased gene flow between regions, and most of this appears to be from the release of Gulf of St. Lawrence lobsters in the Gulf of Maine. A reassessment of previous studies on adult morphology, benthic movements, larval dispersal, enzyme electrophoresis, and commercial landing patterns supports the separation of the Gulf of St. Lawrence stock from the rest of the Canadian Maritimes. |
format |
Article in Journal/Newspaper |
author |
Harding, Gareth Kenchington, Ellen Zheng, Zhensui |
spellingShingle |
Harding, Gareth Kenchington, Ellen Zheng, Zhensui Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
author_facet |
Harding, Gareth Kenchington, Ellen Zheng, Zhensui |
author_sort |
Harding, Gareth |
title |
Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
title_short |
Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
title_full |
Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
title_fullStr |
Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
title_full_unstemmed |
Morphometrics of American Lobster ( Homarus americanus) Larvae in Relation to Stock Determinations in the Maritimes, Canada |
title_sort |
morphometrics of american lobster ( homarus americanus) larvae in relation to stock determinations in the maritimes, canada |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/f93-005 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-005 |
genre |
Breton Island |
genre_facet |
Breton Island |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 1, page 43-52 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f93-005 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
50 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
52 |
_version_ |
1799477958438551552 |