Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations
Large differences in certain morphological traits between populations of brown trout (Salmo trutfa L.) in the lakes of northern Sweden led us to initiate an electrophoretic examination in an effort to understand the genetic structure of these populations. A total of 549 brown trout from four lakes w...
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1976
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ftunivmontana:oai:scholarworks.umt.edu:biosci_pubs-1347 2023-07-16T04:00:10+02:00 Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations Allendorf, Fred W. Ryman, Nils Stennek, A. Stahl, G. 1976-01-01T08:00:00Z application/pdf https://scholarworks.umt.edu/biosci_pubs/347 https://scholarworks.umt.edu/context/biosci_pubs/article/1347/viewcontent/Hereditas_vol_83.pdf unknown ScholarWorks at University of Montana https://scholarworks.umt.edu/biosci_pubs/347 https://scholarworks.umt.edu/context/biosci_pubs/article/1347/viewcontent/Hereditas_vol_83.pdf © 1976 Fred W. Allendorf, Nils Ryman, A. Stennek, and G. Stahl Biological Sciences Faculty Publications Biology Life Sciences text 1976 ftunivmontana 2023-06-27T22:10:39Z Large differences in certain morphological traits between populations of brown trout (Salmo trutfa L.) in the lakes of northern Sweden led us to initiate an electrophoretic examination in an effort to understand the genetic structure of these populations. A total of 549 brown trout from four lakes were examined at 10 electrophoretically detected loci. Genetic variation was found at only three loci, coding for lactate dehydrogenase (LDH), alpha-glycerophosphate dehydrogenase (AGP), and creatine phosphokinase (CPK). A total absence of heterozygotes at the LDH-I locus in Lake Bunnersjoarna, coupled with significant correlations between LDH-I type and both CPK-I allele frequencies and body size, is interpreted as evidence of two genetically isolated populations of brown trout in this lake. This finding, in addition to large allele frequency difTerences between brown trout from different lakes, is evidence of a large amount of genetic differentiation in these populations within a small geographical area. The implications of these results are discussed from both an evolutionary and a fishery management perspective. Further studies are planned to determine if these two sympatric populations are representatives of two widespread sibling species or are a locally evolved phenomenon. We also intend to detail the biochemical genetic, behavioral, and ecological differences between the two distinct populations in Lake Bunnersjoarna. Text Northern Sweden University of Montana: ScholarWorks Four Lakes ENVELOPE(-126.826,-126.826,54.858,54.858) |
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University of Montana: ScholarWorks |
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ftunivmontana |
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topic |
Biology Life Sciences |
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Biology Life Sciences Allendorf, Fred W. Ryman, Nils Stennek, A. Stahl, G. Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
topic_facet |
Biology Life Sciences |
description |
Large differences in certain morphological traits between populations of brown trout (Salmo trutfa L.) in the lakes of northern Sweden led us to initiate an electrophoretic examination in an effort to understand the genetic structure of these populations. A total of 549 brown trout from four lakes were examined at 10 electrophoretically detected loci. Genetic variation was found at only three loci, coding for lactate dehydrogenase (LDH), alpha-glycerophosphate dehydrogenase (AGP), and creatine phosphokinase (CPK). A total absence of heterozygotes at the LDH-I locus in Lake Bunnersjoarna, coupled with significant correlations between LDH-I type and both CPK-I allele frequencies and body size, is interpreted as evidence of two genetically isolated populations of brown trout in this lake. This finding, in addition to large allele frequency difTerences between brown trout from different lakes, is evidence of a large amount of genetic differentiation in these populations within a small geographical area. The implications of these results are discussed from both an evolutionary and a fishery management perspective. Further studies are planned to determine if these two sympatric populations are representatives of two widespread sibling species or are a locally evolved phenomenon. We also intend to detail the biochemical genetic, behavioral, and ecological differences between the two distinct populations in Lake Bunnersjoarna. |
format |
Text |
author |
Allendorf, Fred W. Ryman, Nils Stennek, A. Stahl, G. |
author_facet |
Allendorf, Fred W. Ryman, Nils Stennek, A. Stahl, G. |
author_sort |
Allendorf, Fred W. |
title |
Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
title_short |
Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
title_full |
Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
title_fullStr |
Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
title_full_unstemmed |
Genetic variation in Scandinavian brown trout ( Salmo trutta L.): evidence of distinct sympatric populations |
title_sort |
genetic variation in scandinavian brown trout ( salmo trutta l.): evidence of distinct sympatric populations |
publisher |
ScholarWorks at University of Montana |
publishDate |
1976 |
url |
https://scholarworks.umt.edu/biosci_pubs/347 https://scholarworks.umt.edu/context/biosci_pubs/article/1347/viewcontent/Hereditas_vol_83.pdf |
long_lat |
ENVELOPE(-126.826,-126.826,54.858,54.858) |
geographic |
Four Lakes |
geographic_facet |
Four Lakes |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Biological Sciences Faculty Publications |
op_relation |
https://scholarworks.umt.edu/biosci_pubs/347 https://scholarworks.umt.edu/context/biosci_pubs/article/1347/viewcontent/Hereditas_vol_83.pdf |
op_rights |
© 1976 Fred W. Allendorf, Nils Ryman, A. Stennek, and G. Stahl |
_version_ |
1771548707586572288 |