A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium
Lake whitefish, Coregonus clupeaformis, populations from across western Canada were studied in reference to their isolation and subsequent dispersal from separate glacial refugia. Frequencies of alleles of the genes governing electrophoretic phenotypes of glycerol-3-phosphate dehydrogenase (G-3-PDH)...
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Language: | English |
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1980
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/6646 2023-06-18T03:41:44+02:00 A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium Foote, Christopher John 1980 xi [i.e. xii], 125 leaves : application/pdf http://hdl.handle.net/1993/6646 eng eng ocm72771189 http://hdl.handle.net/1993/6646 open access master thesis 1980 ftunivmanitoba 2023-06-04T17:38:38Z Lake whitefish, Coregonus clupeaformis, populations from across western Canada were studied in reference to their isolation and subsequent dispersal from separate glacial refugia. Frequencies of alleles of the genes governing electrophoretic phenotypes of glycerol-3-phosphate dehydrogenase (G-3-PDH), heart-type lactate dehydrogenase (LDH) and isocitrate dehydrogenase (IDH) proved useful for characterizing populations. Hemoglobin electrophoretic phenotypes and modal gillraker numbers for each population were useful in discerning differences among large groups of populations. Three biochemically distinct population groups of lake whitefish were found in western Canada and it is suggested that the most plausible hypothesis to account for the genetic integrity and geographical distribution of these groups is that they have separate origins in glacial refugia. Selection did not appear to account for the present genetic distinctions between the groups. It has been shown previously that lake whitefish probably survived the Wisconsin glaciation in both the Bering and Mississippi-Missouri glacial refugia. Recent geological evidence and the results of the present study regarding the distribution of populations of one of the groups favour isolation and dispersal from an additional refugium in the area of the present Nahanni National Park, N.W.T. Contact of the different refugial forms appears to have led to introgression in some cases but, in general, most populations remain genetically distinct even in the absence of physical barriers to gene flow. Master Thesis Nahanni National Park MSpace at the University of Manitoba Canada |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
description |
Lake whitefish, Coregonus clupeaformis, populations from across western Canada were studied in reference to their isolation and subsequent dispersal from separate glacial refugia. Frequencies of alleles of the genes governing electrophoretic phenotypes of glycerol-3-phosphate dehydrogenase (G-3-PDH), heart-type lactate dehydrogenase (LDH) and isocitrate dehydrogenase (IDH) proved useful for characterizing populations. Hemoglobin electrophoretic phenotypes and modal gillraker numbers for each population were useful in discerning differences among large groups of populations. Three biochemically distinct population groups of lake whitefish were found in western Canada and it is suggested that the most plausible hypothesis to account for the genetic integrity and geographical distribution of these groups is that they have separate origins in glacial refugia. Selection did not appear to account for the present genetic distinctions between the groups. It has been shown previously that lake whitefish probably survived the Wisconsin glaciation in both the Bering and Mississippi-Missouri glacial refugia. Recent geological evidence and the results of the present study regarding the distribution of populations of one of the groups favour isolation and dispersal from an additional refugium in the area of the present Nahanni National Park, N.W.T. Contact of the different refugial forms appears to have led to introgression in some cases but, in general, most populations remain genetically distinct even in the absence of physical barriers to gene flow. |
format |
Master Thesis |
author |
Foote, Christopher John |
spellingShingle |
Foote, Christopher John A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
author_facet |
Foote, Christopher John |
author_sort |
Foote, Christopher John |
title |
A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
title_short |
A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
title_full |
A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
title_fullStr |
A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
title_full_unstemmed |
A biochemical genetic study of zoogeography of lake whitefish, Coregonus clupeaformis, in western Canada in relation to their possible survival in a Nahanni glacial refugium |
title_sort |
biochemical genetic study of zoogeography of lake whitefish, coregonus clupeaformis, in western canada in relation to their possible survival in a nahanni glacial refugium |
publishDate |
1980 |
url |
http://hdl.handle.net/1993/6646 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Nahanni National Park |
genre_facet |
Nahanni National Park |
op_relation |
ocm72771189 http://hdl.handle.net/1993/6646 |
op_rights |
open access |
_version_ |
1769007404436946944 |