title: Endrin and malathion toxicity to flagfish (Jordanella floridae).
abstract: Endrin and malathion effects on survival, growth, and reproduction of flagfish were determined in a flow-through system. Endrin chronic effects on first-generation growth and reproduction occurred only at 0.3 microgram/L, the highest concentration tested. The mean endrin residues in the first-generation fish at 65 days were about 15,000 times the water concentration in all concentrations tested. Malathion concentrations of 31.5 microgram/L and 24.7 microgram/L, the highest concentrations tested, had detrimental effects on first-generation survival. During the same period malathion concentrations as low as 10.9 microgram/L significantly affected growth. Neither insecticide, at the concentrations tested, had any detectable effects on the second generation during a 30-day exposure period. Acute toxicities to juvenile fish were also determined in the same flo-through system. The 96-hr LC50's were 0.85 microgram/L for endrin and 349 microgram/L for malathion.
mesh_terms: D000818:Animals; D004026:Dieldrin / Q000032:analysis; D004732:Endrin / Q000032:analysis / Q000633:toxicity*; D005260:Female; D005399:Fishes / Q000502:physiology*; D005618:Fresh Water; D006128:Growth / Q000187:drug effects; D007814:Larva; D008294:Malathion / Q000633:toxicity*; D008297:Male; D012098:Reproduction / Q000187:drug effects; D013997:Time Factors
chemical_list: D004026:Dieldrin; D004732:Endrin; D008294:Malathion