|SREL Reprint #0609|
of Chronic Cadmium Exposure on Crayfish Survival, Growth, and Tolerance to
H. Thorp, John P. Giesy, and Susan A. Wineriter
Crayfish Cambarus latimanus were
subjected over a 5-month period to 0.02, 5, and 10 µg Cd/L in a continuous flow
system at ambient winter temperatures. Uptake
of cadmium, growth, and mortality were measured.
One-half of the surviving crayfish were analyzed for Cd after completion
of the 5-month experiment, while the remaining half were removed from the
contaminated water and subjected in a static laboratory experiment to stepwise,
daily increases in temperature. The
results indicated that (1) the rate of Cd uptake in crayfish was positively
related to external concentration, (2) mortality increased significantly with
higher Cd concentrations, and (3) neither growth nor thermal tolerance was
significantly related to the Cd concentration in the crayfish tissues.
The importance of chornic, low-level studies is discussed.
SREL Reprint #0609
Thorp, J.H., J.P. Giesey, and S.A. Wineriter. 1979. Effects of chronic cadmium exposure on crayfish survival, growth, tolerance to elevated temperatures. Archives of Environmental Contamination and Toxicology 8:449-456.