Population or Stock Structure of Lake Whitefish, Coregonus clupeaformis, in Northern Lake Michigan as Assessed by Isozyme Electrophoresis

Abstract

Electrophoretic analysis of three polymorphic isozymes (lactate, malate, and glycerol-3-phosphate dehydrogenases) from lake whitefish, Coregonus clupeaformis, indicated that at least four populations exist in northern Lake Michigan. Cluster analysis of Nei genetic identity indices revealed much temporal and spatial overlap among population ranges. The overlap did not appear complete since the LDH A allele exhibited clinal variation with increasing frequency from south to north. Because population ranges overlap spatially and temporally, commercial catches are likely to contain fish from more than one population.Key words: population (stock), isozyme electrophoresis, lake whitefish, Lake Michigan

Electrophoretic expression of genetic variation and duplicate gene activity in vendace, Coregonus albula (Salmonidae)

“…The breeding experiments (VUORINEN and PIIRONEN 1984b) verify this mode of inheritance. A similar model has also been postulated for Coregonus clupeaformis (FRANZIN and CLAYTON 1977;IMHOF et al 1980). The rare phenotypes indicate two additional alleles (135 and 75) at these loci.…”

Microsatellite and mitochondrial DNA markers show no evidence of population structure in walleye (Sander vitreus) in Lake Winnipeg

“…Conversely, it is possible that declines of walleye stocks in the Laurentian Great Lakes due to fishing pressure and eutrophication (Roseman et al, 2010) have caused a slight population bottleneck, decreasing the overall diversity. Allozyme studies on lake whitefish (another commercially exploited species) in Lake Winnipeg found levels of genetic diversity (Mavros, 1992) that were higher than values seen in lake whitefish in the Great Lakes (Imhof et al, 1980;Casselman et al, 1981;Ihssen et al, 1981).…”

Spatial and temporal distributions of lake whitefish spawning stocks in Northern lakes Michigan and Huron, 2003–2008

“…Both molecular and morphological studies have indicated that distinct genetic stocks of lake whitefish exist throughout the Great Lakes (Imhof et al, 1980;Casselman et al, 1981;VanDeHey et al, 2009;Stott et al, 2010). Mark-recapture studies conducted in the 1980s and early 1990s found that lake whitefish movement was generally restricted to areas proximal to the stocks' spawning locations (Casselman et al, 1981;Ebener and Copes, 1985;Scheerer and Taylor, 1985;Walker et al, 1993).…”