Metals in fish scales collected in Lake Opeongo, Canada, from 1939 to 1979

Journal Article · Mon May 01 00:00:00 EDT 1989 · Transactions of the American Fisheries Society; (USA)

DOI:https://doi.org/10.1577/1548-8659(1989)118<0331:MIFSCI>2.3.CO;2· OSTI ID:5760486

Johnson, M G ^[1]

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1. Dept. of Fisheries and Oceans, Burlington, Ontario (Canada)

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.

• OSTI ID: 5760486
• Journal Information: Transactions of the American Fisheries Society; (USA), Vol. 118:3; ISSN 0002-8487
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
54 ENVIRONMENTAL SCIENCES
METALS
BIOLOGICAL ACCUMULATION
CADMIUM
CANADA
COPPER
FISHES
HISTORICAL ASPECTS
MERCURY
TISSUE DISTRIBUTION
TROUT
ZINC
ANIMALS
AQUATIC ORGANISMS
DISTRIBUTION
ELEMENTS
NORTH AMERICA
TRANSITION ELEMENTS
VERTEBRATES
551000* - Physiological Systems
540320 - Environment
Aquatic- Chemicals Monitoring &amp; Transport- (1990-)