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Comparison of Impinged and Open‐Water Alewives at Pickering Nuclear Generating Station, Lake Ontario
Author(s) -
Rodgers David W.
Publication year - 1995
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1995)015<0152:coiaow>2.3.co;2
Subject(s) - fish <actinopterygii> , water level , open water , biology , environmental science , zoology , fishery , geography , cartography
I compared alewives Alosa pseudoharengus impinged at Pickering Nuclear Generating Station on the northwestern shore of Lake Ontario with alewives seined along the lakeshore. The characteristics assessed included morphological measurements, counts of the principal fin rays, allelic frequencies for more than twenty‐five protein‐coding loci, and pathological and parasitological condition. In general, impinged alewives were similar to alewives in the open water. Impingement did not appear to select unhealthy fish, and the allelic frequencies of impinged alewives did not differ significantly ( P > 0.05) from open‐water fish. However, impinged alewives had significantly ( P < 0.05) lower body weights and liver weights, at an equivalent length, than open‐water fish. The observed differences were suggestive of exhaustion of the impinged alewives, but the causes of exhaustion and impingement have yet to be resolved.