Premium
Metals in Fish Scales Collected in Lake Opeongo, Canada, from 1939 to 1979
Author(s) -
Johnson Murray G.
Publication year - 1989
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1989)118<0331:mifsci>2.3.co;2
Subject(s) - micropterus , profundal zone , salvelinus , bass (fish) , trout , environmental science , fishery , sediment core , fish <actinopterygii> , sediment , ecology , biology , benthic zone , paleontology
Time series (1939–1979) of metal concentrations in historical collections of scales from lake trout Salvelinus namaycush and smallmouth bass Micropterus dolomieui from Lake Opeongo, Canada, were compared with temporal trends in metal concentration profiles in core samples of profundal lake sediment. There was no trend for Zn in scales. Elevated Cu and Hg concentrations occurred early in the study period in both species. Elevated Cd was found in the earliest year in smallmouth bass scales. Temporal trends in Hg (and possibly Cd) in smallmouth bass scales probably were attributable to differences in fish weight among years. The data did not support the hypothesis that temporal trends in metal loadings entering lakes are reflected by fish tissue concentrations.