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Allelic variability in species and stocks of Lake Superior ciscoes (Coregoninae)

Canadian Journal of Fisheries and Aquatic Sciences

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DOI: 10.1139/f81-227

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Abstract

Starch gel electrophoresis was used as a means of recognizing species and stocks in Lake Superior Coregonus. Allelic variability at isocitrate dehydrogenase and glycerol-3-phosphate dehydrogenase loci was recorded for samples of lake herring (Coregonus artedii), bloater (C. hoyi), kiyi (C. kiyi), and shortjaw cisco (C. zenithicus) from five Lake Superior localities. The observed frequencies of genotypes within each subsample did not differ significantly from those expected on the basis of random mating, and suggested that each subsample represented either a random sample from a larger randomly mating population or an independent and isolated subpopulation within which mating was random. Significant contingency X2 values for comparisons between both localities and species suggested that more than one randomly mating population occurred among the Lake Superior ciscoes, but did not reveal how many such populations there were. In contrast to the genetic results of this study, morphology seems to be a better descriptor of cisco stocks, and identification of cisco stocks and species will still have to be based on morphological criteria until more data are forthcoming. Where several species are sympatric, management should strive to preserve the least abundant. Failure to do so could result in the extinction or depletion of the rarer forms.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Allelic variability in species and stocks of Lake Superior ciscoes (Coregoninae)
Series title:
Canadian Journal of Fisheries and Aquatic Sciences
DOI:
10.1139/f81-227
Volume
38
Issue:
12
Year Published:
1981
Language:
English
Publisher:
NRC Research Press
Publisher location:
Ottawa, Ontario
Contributing office(s):
Great Lakes Science Center
Description:
p. 1808-1813
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Journal of Fisheries and Aquatic Sciences
First page:
1808
Last page:
1813