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EFFECTS OF AQUEOUS AND DIETARY EXPOSURE OF DIELDRIN ON SURVIVAL, GROWTH AND BIOCONCENTRATION IN MALLARD DUCKLINGS
Citation:
Nebeker, A., W. Griffis, T. Stutzman, G. Schuytema, L. Carey, AND S. Scherer. EFFECTS OF AQUEOUS AND DIETARY EXPOSURE OF DIELDRIN ON SURVIVAL, GROWTH AND BIOCONCENTRATION IN MALLARD DUCKLINGS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-92/291 (NTIS PB92217413).
Description:
Tests were conducted to determine the effects of dieldrin in continuous-flow water and in food on survival, growth, and bioconcentration in mallard ducklings. ieldrin had no effect on survival or growth at concentrations at or below water saturation (0.2 mg/L), but tissue (lipid, skin, liver, muscle, brain, blood) dieldrin concentrations increased rapidly and bioconcentration factors (BCFs) showed up to 1,995 times more dieldrin in tissue than in the water. ignificant effects on survival, growth, and behavior were observed in ducks fed dieldrin-spiked food, and tissue rapidly concentrated dieldrin up to five times more than those in the water-only test, although the BCFs were much lower, he dietary 96-h LC50 value was 165 ug/g dieldrin; level (LOAEL), and no observed adverse effect level (NOAEL) values were 16.4 and 0.3 ug/g, respectively, based on growth (total weight). creening level wildlife criteria (SLWC) value of 0.0001 mg/L was derived by using data from this study. teady-state tissue dieldrin concentrations at which growth impairment occurred were near 140 (lipid), 80 (skin), 20 (liver), 10 (brain), and 5 (muscle) ug/g dieldrin. issue dieldrin concentrations where no growth impairment was observed were near 3.0 (lipid), 1.0 (skin), and <1.0 (liver, brain, and muscle) ug/g.