Allopatric Origin of Sympatric Populations of Lake Whitefish (Coregonus clupeaformis) as Revealed by Mitochondrial-DNA Restriction Analysis

Evolution ◽  
1990 ◽  
Vol 44 (5) ◽  
pp. 1263 ◽  
Author(s):  
Louis Bernatchez ◽  
Julian J. Dodson
Keyword(s):  
Mitochondrial Dna ◽  
Restriction Analysis ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Sympatric Populations ◽  
Dna Restriction

Why are dwarf fish so small? An energetic analysis of polymorphism in lake whitefish (Coregonus clupeaformis)

2001 ◽  
Vol 58 (2) ◽  
pp. 394-405 ◽  
Author(s):  
Marc Trudel ◽  
Alain Tremblay ◽  
Roger Schetagne ◽  
Joseph B Rasmussen
Keyword(s):  
Life Span ◽  
Energy Budget ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Sympatric Populations ◽  
Subarctic Lakes ◽  
Lower Growth ◽  
Chemical Tracers ◽  
Mass Balance Models ◽  
Consumption Rates

Sympatric populations of dwarf lake whitefish (Coregonus clupeaformis) (DLW) and normal lake whitefish (NLW) commonly occur in north temperate and subarctic lakes. DLW have a much lower growth, mature earlier, and have a shorter life span than NLW. Furthermore, they are usually not found when cisco (Coregonus artedi) are present, possibly due to competitive exclusion. In this study, we compared the energy budget of DLW, NLW, and cisco using food consumption rates estimated with mass balance models of chemical tracers (i.e., mercury and radiocesium). These chemicals are globally distributed and can be readily detected in fish and their prey. Our analysis showed that the energy budget of DLW and cisco was similar. DLW and cisco consumed on average 40–50% more food than NLW. The conversion efficiency of DLW and cisco was two to three times lower than that of NLW. These results suggest that DLW and cisco allocated a larger fraction of their energy budget to metabolism than NLW. Our analysis also suggests that the earlier maturation and shorter life span of DLW and cisco may be due to their higher metabolic rates.

The utility of mitochondrial DNA restriction analysis in the classification of strains of Chrysosporium (hyphomycetes)

1996 ◽  
Vol 134 (2) ◽  
pp. 65-69 ◽  
Author(s):  
J. Cano ◽  
J. M. Guillamón ◽  
P. Vidal ◽  
J. Guarro
Keyword(s):  
Mitochondrial Dna ◽  
Restriction Analysis ◽  
Dna Restriction

Discrimination between different groups of Candida parapsilosis by mitochondrial DNA restriction analysis

1988 ◽  
Vol 13 (5) ◽  
pp. 445-449 ◽  
Author(s):  
Nadine Camougrand ◽  
Bernard Mila ◽  
Gis�le Velours ◽  
Jaga Lazowska ◽  
Martine Gu�rin
Keyword(s):  
Mitochondrial Dna ◽  
Candida Parapsilosis ◽  
Restriction Analysis ◽  
Dna Restriction

Evolution of Lake Whitefish (Coregonus clupeaformis) in North America during the Pleistocene: Genetic Differentiation between Sympatric Populations

1992 ◽  
Vol 49 (4) ◽  
pp. 769-779 ◽  
Author(s):  
R. A. Bodaly ◽  
J. W. Clayton ◽  
C. C. Lindsey ◽  
J. Vuorinen
Keyword(s):  
North America ◽  
New England ◽  
Glacial Refugia ◽  
Yukon Territory ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Sympatric Populations ◽  
Sympatric Forms ◽  
Electrophoretic Data ◽  
Glacial Refuge

We use electrophoretic data on dehydrogenase enzymes to examine the relatedness of sympatric populations of lake whitefish (Coregonus clupeaformis) and provide evidence for the existence of a glacial refuge race of lake whitefish in eastern North America. This Acadian race is presently found in New England, the Gaspé peninsula of Québec, and New Brunswick. It probably survived glaciation in a refugium on the exposed coastal plain of northeastern North America. In areas of contact, most glacial races appear to introgress and do not coexist in sympatry. However, sympatric pairs of populations occur (or occurred) within the ranges of all races of lake whitefish. Allele frequencies for at least one enzyme system examined for most sympatric pairs were significantly different, indicating that these sympatric populations are wholly or substantially, isolated reproductively from each other. Both members of the population pairs examined in the Yukon Territory, Ontario, and Labrador were genetically characteristic of the glacial races of their region. This suggests that they are not the result of speciation due to geographic isolation in different glacial refugia. Thus, their origin appears to be postglacial, but may be older if present genetic similarities are due to recent gene flow between sympatric forms.

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