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EFFECTS OF FENVALERATE ON THE EARLY LIFE-STAGES OF TOPSMELT (ATHERINOPS AFFINIS)
Citation:
Goodman, L., M. Hemmer, D. Middaugh, AND J. Moore. EFFECTS OF FENVALERATE ON THE EARLY LIFE-STAGES OF TOPSMELT (ATHERINOPS AFFINIS). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-92/211 (NTIS PB92195684).
Description:
Flow-through acute and early life-stage (ELS) toxicity tests were conducted with topsmelt (Atherinops affinis), a Pacific Coast saltwater fish, and fenvalerate, a synthetic pyrethroid insecticide. he 96-h LC50 for juvenile fish was 0.66 ug/L. n the 30-d ELS test was laboratory-spawned embryos, average measured fenvalerate concentrations were nondetectable (<0.075 ug/L) in two control treatments, 0.14, 0.34, 0.82, 1.5, and 3.2 ug/L. urvival of embryos to hatching ranged from 94% to 100%, with no statistically significant differences among treatments. o fry survived exposure to fenvalerate concentrations greater than or equal to 0.82 ug/L; overall survival in lower concentrations and control treatments ranged from 86% to 97%. here were no consistent concentration-dependant differences in weight between fish in the carrier-control treatment and fish exposed to fenvalerate. ean wet weights of surviving fish ranged from 16.9 mg in 0.34 ug/L to 20.3 mg in 0.14 ug/L. he average bioconcentration factor for fish exposed to 0.14 and 0.34 ug fenvalerate/L was 315.