Abstract
The general protein patterns as produced by isoelectric focusing and the starch gel zymograms of 15 enzymes from samples of charr ( Salvelinus alpinus ) from seven Irish lakes and from autumn and spring spawning Windermere populations showed considerable homogeneity. This would suggest that all the populations examined are conspecific and descended from a common ancestor within the past 50,000 years, if not in the immediate post-glacial period. The same esterase polymorphism as described by Nyman in Scandinavian and other Arctic charr populations was noted.
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