Effect of age on sensitivity of daphnia magna to cadmium, copper and cyanazine

Technical Report · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7145241

Nebeker, A V; Cairns, M A; Onjukka, S T; Titus, R H

Daphnia magna were exposed to cadmium, copper, and cyanazine to determine the relative sensitivities of several age groups: less than 4 h, less than 24 h, 1 d, 2 d, 3 d, 4 d, 5 d, and 6 d old. Mean cadmium 48-h EC50 values for each age group ranged from 23 to 164 micrograms/L. Mean copper EC50 values ranged from 6 to 18 micrograms/L. Cyanazine EC50 values ranged from 53 to 106 micrograms/L. The 1-d-old Daphnia mean EC50s were 48 and 49 micrograms/L for cadmium, 10 and 10 micrograms/L for copper and 84 and 86 microgram/L for cyanazine, respectively. These similar sensitivities indicate that older animals can be used in tests equally as well as younger animals, thus simplifying the recovery of daphnids in acute sediment toxicity tests.

• Research Organization: Environmental Protection Agency, Corvallis, OR (USA). Environmental Research Lab.
• OSTI ID: 7145241
• Report Number(s): PB-87-100590/XAB; EPA-600/J-86/131
• 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.
AGE GROUPS
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BIOLOGICAL EFFECTS
BRANCHIOPODS
CADMIUM
COPPER
CRUSTACEANS
DAPHNIA
ELEMENTS
INVERTEBRATES
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
SENSITIVITY
TRANSITION ELEMENTS