Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus )
Mitochondrial DNA polymorphism was examined in haddock (Melanogrammus aeglefinus) from five offshore banks in the western North Atlantic. A total of 21 genotypes were observed in an initial survey of 54 haddock with 12 restriction endonucleases. Five enzymes that revealed most of the genetic variati...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1992
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crcansciencepubl:10.1139/f92-279 2024-03-03T08:47:02+00:00 Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) Zwanenburg, K. C. T. Bentzen, P. Wright, J. M. 1992 http://dx.doi.org/10.1139/f92-279 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-279 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 12, page 2527-2537 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-279 2024-02-07T10:53:28Z Mitochondrial DNA polymorphism was examined in haddock (Melanogrammus aeglefinus) from five offshore banks in the western North Atlantic. A total of 21 genotypes were observed in an initial survey of 54 haddock with 12 restriction endonucleases. Five enzymes that revealed most of the genetic variation were used in an expanded survey from which we observed 22 genotypes among 133 haddock. Both the 12- and 5-enzyme results showed that haddock from each of the five banks comprised a mixture of divergent genotypes that could each be assigned to one of at least four groups of related genotypes differing by mean estimated divergences of 0.6–0.8%. These divergent genotypes may have arisen in past haddock populations that were more isolated than those of the present. Although genotype frequencies did not differ significantly in most pairwise comparisons of banks, two measures of genetic (dis)similarity were significantly correlated with geographic distance as well as with the presence and relative size of deepwater (> 180 m) channels separating the banks. One of the genotype groups also exhibited a geographic cline in frequency of occurrence. These features indicate that gene flow among populations is restricted, and hence support the existence of discrete stocks of haddock. Article in Journal/Newspaper North Atlantic Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 49 12 2527 2537 |
institution |
Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Zwanenburg, K. C. T. Bentzen, P. Wright, J. M. Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Mitochondrial DNA polymorphism was examined in haddock (Melanogrammus aeglefinus) from five offshore banks in the western North Atlantic. A total of 21 genotypes were observed in an initial survey of 54 haddock with 12 restriction endonucleases. Five enzymes that revealed most of the genetic variation were used in an expanded survey from which we observed 22 genotypes among 133 haddock. Both the 12- and 5-enzyme results showed that haddock from each of the five banks comprised a mixture of divergent genotypes that could each be assigned to one of at least four groups of related genotypes differing by mean estimated divergences of 0.6–0.8%. These divergent genotypes may have arisen in past haddock populations that were more isolated than those of the present. Although genotype frequencies did not differ significantly in most pairwise comparisons of banks, two measures of genetic (dis)similarity were significantly correlated with geographic distance as well as with the presence and relative size of deepwater (> 180 m) channels separating the banks. One of the genotype groups also exhibited a geographic cline in frequency of occurrence. These features indicate that gene flow among populations is restricted, and hence support the existence of discrete stocks of haddock. |
format |
Article in Journal/Newspaper |
author |
Zwanenburg, K. C. T. Bentzen, P. Wright, J. M. |
author_facet |
Zwanenburg, K. C. T. Bentzen, P. Wright, J. M. |
author_sort |
Zwanenburg, K. C. T. |
title |
Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
title_short |
Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
title_full |
Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
title_fullStr |
Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
title_full_unstemmed |
Mitochondrial DNA Differentiation in Western North Atlantic Populations of Haddock ( Melanogrammus aeglefinus ) |
title_sort |
mitochondrial dna differentiation in western north atlantic populations of haddock ( melanogrammus aeglefinus ) |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-279 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-279 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 12, page 2527-2537 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-279 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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49 |
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12 |
container_start_page |
2527 |
op_container_end_page |
2537 |
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1792503159550115840 |