Effect of cadmium on reproduction of daphnids in a small aquatic microcosm.
Chlorella vulgaris colonies were grown as nutrient agar for one week, followed by addition of Daphnia magna in overlying water for a second week. A range of concentrations of cadmium were added to the Chlorella or to the Chlorella followed by higher cadmium concentrations in the overlying fluid. A dose-dependent reduction in reproduction was observed with increased cadmium. When parent daphnids were first exposed to a lower cadmium concentration, and their offspring of preconditioned juvenile daphnids then exposed to a higher concentration, cadmium tolerance in new-born daphnids was observed.
Janati-Idrissi
M
M
Faculté de Pharmacie de Rouen, Laboratoire de Toxicologie, 22 Boulevard Gambetta, 76000 Rouen, France.
Guerbet
M
M
Jouany
J M
JM
D000818:Animals; D002104:Cadmium / Q000009:adverse effects*; D002708:Chlorella / Q000737:chemistry*; D003621:Daphnia; D004305:Dose-Response Relationship, Drug; D005260:Female; D020387:Food Chain; D012098:Reproduction / Q000187:drug effects*; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000009:adverse effects*
D014874:Water Pollutants, Chemical; D002104:Cadmium