Effects of diet on seven-day Ceriodaphnia dubia toxicity tests

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Ohio Journal of Science; (United States)

OSTI ID:6329264

Cerda, B; Olive, J H ^[1]

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1. Univ. of Akron, OH (United States)

The purpose of this study was to evaluate the effects of four diets on the results of seven-day Ceriodaphnia dubia toxicity tests. Survival and reproduction were used as indices to detect the sensitivity of this species to acute and chronic copper stress. All toxicity tests were conducted using the moderately hard reconstituted water recommended in 1989 by the U.S. Environmental Protection Agency. Diet differentially affected the acute and chronic toxicity of copper. Daphnids fed Selenastrum capricornutum (alga) showed the greatest sensitivity, followed by those fed the alga Chlamydomonas reinhardti, then by animals fed a Yeast-Cerophyll[sup TM]-Trout Food (YCTF) mixture plus Selenastrum, and finally by animals fed YCTF alone. These differences may result from the poor nutritional adequacy of Selenastrum when fed alone, the different caloric contents of the diets, the increased toxicant uptake by the organisms through ingestion of copper-laden algal cells, and/or copper ions sequestered by fats and insoluble substances in YCTF. The authors recognize that diet is an important variable in seven-day toxicity tests, and that the selection of a diet should not be based only on its effects on long-term culturing of C. dubia, but also on its possible effects on test results.

• OSTI ID: 6329264
• Journal Information: Ohio Journal of Science; (United States), Journal Name: Ohio Journal of Science; (United States) Vol. 93:3; ISSN 0030-0950; ISSN OJSCA9
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACUTE EXPOSURE
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BRANCHIOPODS
CHRONIC EXPOSURE
COPPER
CRUSTACEANS
DAPHNIA
DIET
ELEMENTS
INGESTION
INTAKE
INVERTEBRATES
METALS
REPRODUCTION
SENSITIVITY
SURVIVAL TIME
TOXICITY
TRANSITION ELEMENTS