Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes
I estimated the morphological and genetic differentiation among sympatric morphs of Arctic charr (Salvelinus alpinus) from five Icelandic lakes. Morphological variation was estimated by measuring fifteen characters while genetic differentiation was estimated by determining allele frequencies at five...
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University of Guelph
1998
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ftunivguelph:oai:atrium.lib.uoguelph.ca:10214/21675 2023-11-05T03:38:00+01:00 Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes Gíslason, Daví? Ferguson, M.M. 1998 application/pdf https://hdl.handle.net/10214/21675 en eng University of Guelph https://hdl.handle.net/10214/21675 All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. morphology genetics differentiation sympatric morphs Arctic charr Salvelinus alpinus Icelandic lakes Thesis 1998 ftunivguelph 2023-10-08T06:14:16Z I estimated the morphological and genetic differentiation among sympatric morphs of Arctic charr (Salvelinus alpinus) from five Icelandic lakes. Morphological variation was estimated by measuring fifteen characters while genetic differentiation was estimated by determining allele frequencies at five microsatellite loci. The sympatric morphs showed variable degrees of morphological differentiation. Sympatric morphs clustered together on a Neighbour Joining phenogram based on the frequencies of microsatellite alleles and shared some alleles not found in the charr from other lakes. This suggests that the morphs have diverged in their respective lakes. Furthermore, sympatric morphs from different lakes showed variable degrees of morphological and genetic differentiation. The degree of morphological and genetic differentiation was coupled across lakes, suggesting that morphological differences become more pronounced as reproductive isolation becomes established. These results suggest that resource polymorphism is a diversifying force in speciation. Thesis Arctic charr Arctic Salvelinus alpinus University of Guelph: DSpace digital archive |
institution |
Open Polar |
collection |
University of Guelph: DSpace digital archive |
op_collection_id |
ftunivguelph |
language |
English |
topic |
morphology genetics differentiation sympatric morphs Arctic charr Salvelinus alpinus Icelandic lakes |
spellingShingle |
morphology genetics differentiation sympatric morphs Arctic charr Salvelinus alpinus Icelandic lakes Gíslason, Daví? Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
topic_facet |
morphology genetics differentiation sympatric morphs Arctic charr Salvelinus alpinus Icelandic lakes |
description |
I estimated the morphological and genetic differentiation among sympatric morphs of Arctic charr (Salvelinus alpinus) from five Icelandic lakes. Morphological variation was estimated by measuring fifteen characters while genetic differentiation was estimated by determining allele frequencies at five microsatellite loci. The sympatric morphs showed variable degrees of morphological differentiation. Sympatric morphs clustered together on a Neighbour Joining phenogram based on the frequencies of microsatellite alleles and shared some alleles not found in the charr from other lakes. This suggests that the morphs have diverged in their respective lakes. Furthermore, sympatric morphs from different lakes showed variable degrees of morphological and genetic differentiation. The degree of morphological and genetic differentiation was coupled across lakes, suggesting that morphological differences become more pronounced as reproductive isolation becomes established. These results suggest that resource polymorphism is a diversifying force in speciation. |
author2 |
Ferguson, M.M. |
format |
Thesis |
author |
Gíslason, Daví? |
author_facet |
Gíslason, Daví? |
author_sort |
Gíslason, Daví? |
title |
Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
title_short |
Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
title_full |
Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
title_fullStr |
Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
title_full_unstemmed |
Genetic and morphological variation in polymorphic Arctic charr, Salvelinus alpinus, from Icelandic lakes |
title_sort |
genetic and morphological variation in polymorphic arctic charr, salvelinus alpinus, from icelandic lakes |
publisher |
University of Guelph |
publishDate |
1998 |
url |
https://hdl.handle.net/10214/21675 |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_relation |
https://hdl.handle.net/10214/21675 |
op_rights |
All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1781693696610140160 |