Field verification of cadmium toxicity to Laboratory Daphnia populations

Studies were undertaken to compare the short-term toxicity of cadmium to laboratory populations of D. galeata mendotae with that to natural populations of D. galeata mendotae and total Daphnia in Lake Michigan, as indicated by its effects on the populations' rates of increase. Results indicate that short-term laboratory experiments using whole populations can be verified in the natural environment.