An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure
In July 1980 we collected live Macoma balthica from populations at two tide levels near Fort Churchill, Man., Canada. Upper lethal temperature tolerances were determined for clams from the mean low water (MLW) tidal level and from 1.1 m above MLW tidal level, after which all specimens were hard froz...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1983
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Online Access: | http://dx.doi.org/10.1139/f83-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-158 |
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crcansciencepubl:10.1139/f83-158 2023-12-17T10:26:08+01:00 An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure Green, Roger H. Singh, Shiva M. Hicks, Beverly McCuaig, Janet M. 1983 http://dx.doi.org/10.1139/f83-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-158 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 40, issue 9, page 1360-1371 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1983 crcansciencepubl https://doi.org/10.1139/f83-158 2023-11-19T13:39:41Z In July 1980 we collected live Macoma balthica from populations at two tide levels near Fort Churchill, Man., Canada. Upper lethal temperature tolerances were determined for clams from the mean low water (MLW) tidal level and from 1.1 m above MLW tidal level, after which all specimens were hard frozen for later electrophoretic analysis. Of 22 loci evaluated, the following were polymorphic: AKP, ACP, EST, LAP, MDH, and ME. Genotypes at these loci were related to tide level, growth rate, tolerance to high temperature, and age. Analysis of shell annual rings verified an earlier report of much faster growth in the higher tide level population. Growth rate and degree of heterozygosity are both higher at 1.1 m than at MLW. Degree of heterozygosity increases with age, suggesting selection against homozygotes. At 1.1 m, but not at MLW, individuals with higher growth rates have lower tolerance to high temperatures and a higher degree of heterozygosity. Similar patterns are described for the six individual loci. Article in Journal/Newspaper Arctic Canadian Science Publishing (via Crossref) Arctic Canada Fort Churchill ENVELOPE(-94.079,-94.079,58.756,58.756) Canadian Journal of Fisheries and Aquatic Sciences 40 9 1360 1371 |
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 Green, Roger H. Singh, Shiva M. Hicks, Beverly McCuaig, Janet M. An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
In July 1980 we collected live Macoma balthica from populations at two tide levels near Fort Churchill, Man., Canada. Upper lethal temperature tolerances were determined for clams from the mean low water (MLW) tidal level and from 1.1 m above MLW tidal level, after which all specimens were hard frozen for later electrophoretic analysis. Of 22 loci evaluated, the following were polymorphic: AKP, ACP, EST, LAP, MDH, and ME. Genotypes at these loci were related to tide level, growth rate, tolerance to high temperature, and age. Analysis of shell annual rings verified an earlier report of much faster growth in the higher tide level population. Growth rate and degree of heterozygosity are both higher at 1.1 m than at MLW. Degree of heterozygosity increases with age, suggesting selection against homozygotes. At 1.1 m, but not at MLW, individuals with higher growth rates have lower tolerance to high temperatures and a higher degree of heterozygosity. Similar patterns are described for the six individual loci. |
format |
Article in Journal/Newspaper |
author |
Green, Roger H. Singh, Shiva M. Hicks, Beverly McCuaig, Janet M. |
author_facet |
Green, Roger H. Singh, Shiva M. Hicks, Beverly McCuaig, Janet M. |
author_sort |
Green, Roger H. |
title |
An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
title_short |
An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
title_full |
An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
title_fullStr |
An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
title_full_unstemmed |
An Arctic Intertidal Population of Macoma balthica (Mollusca, Pelecypoda): Genotypic and Phenotypic Components of Population Structure |
title_sort |
arctic intertidal population of macoma balthica (mollusca, pelecypoda): genotypic and phenotypic components of population structure |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/f83-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f83-158 |
long_lat |
ENVELOPE(-94.079,-94.079,58.756,58.756) |
geographic |
Arctic Canada Fort Churchill |
geographic_facet |
Arctic Canada Fort Churchill |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 40, issue 9, page 1360-1371 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f83-158 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
40 |
container_issue |
9 |
container_start_page |
1360 |
op_container_end_page |
1371 |
_version_ |
1785577847278010368 |