Size-specific mortality in fry of lake trout (Salvelinus namaycush) from Lake Michigan

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · Bull. Environ. Contam. Toxicol.; (United States)

DOI:https://doi.org/10.1007/BF01611035· OSTI ID:6024908

Seelye, J G; Mac, M J

A study to test the presence and magnitude of size-specific mortality in fry from Lake Michigan lake trout and fry of hatchery origin during exposure to PCBs is presented. Fry from both sources were exposed to 50 ng/l PCBs for about 50 days after hatching and fry from both sources were reared in water to which no PCBs were added. The average lengths of fry from all four groups were significantly less than fry from Lake Michigan. Size-specific mortality observed in fry of Lake Michigan origin could be the result of a number of factors, including origin and condition of parents and environmental stresses, including organic contaminants. Higher mortality of the smaller fry might be considered to have a positive effect on long-term fish production in the larger fish are being selected for, however, decreasing genetic variability in the fish population can result in lower production. Considering the similarity between the physiochemical properties of PCBs and DDT, the substantial concentrations of PCBs in the fry of lake origin may be an important factor in explaining the size-specific mortality observed.

• Research Organization: Great Lakes Fishery Lab., Ann Arbor, MI
• OSTI ID: 6024908
• Journal Information: Bull. Environ. Contam. Toxicol.; (United States), Journal Name: Bull. Environ. Contam. Toxicol.; (United States) Vol. 27:3; ISSN BECTA
• Country of Publication: United States
• Language: English

Related Subjects

560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
AROMATICS
BIOLOGICAL EFFECTS
CHLORINATED AROMATIC HYDROCARBONS
CONTAMINATION
FISHES
GREAT LAKES
HALOGENATED AROMATIC HYDROCARBONS
LAKE MICHIGAN
LAKES
MORTALITY
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
QUANTITY RATIO
SIZE
SURFACE WATERS
TIME DEPENDENCE
TOXICITY
TROUT
VERTEBRATES