Acute Toxicity to Juvenile Rainbow Trout (Salmo gairdneri) of Naturally Occurring Insect Juvenile Hormone Analogues
- 1 December 1975
- journal article
- Published by Canadian Science Publishing in Journal of the Fisheries Research Board of Canada
- Vol. 32 (12) , 2556-2559
- https://doi.org/10.1139/f75-301
Abstract
Median lethal concentrations (LC50) of four insect juvenile hormone analogues (IJHA) for juvenile rainbow trout (Salmo gairdneri) were measured in bioassays with 4-h solution renewal. The most toxic compound tested was Δ4′-dehydrojuvabione, with a 48-h LC50 of 1.4 mg/liter and an estimated 96-h LC50 of approximately 0.8 mg/liter. Juvabione, epimeric mixtures of dihydrojuvabiones, and epimeric mixtures of juvabiols had 96-h LC50’s of 1.5, 1.8, and 2.0 mg/liter, respectively. All fish, including those that survived for 96 h, became lethargic soon after exposure to solutions of the IJHA, and their skins darkened. The toxicants were unstable in aqueous solution.Keywords
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