Metabolism of [14C]2-methylnaphthalene by rainbow trout (Salmo gairdneri) in vivo.

Rainbow trout were exposed to aqueous [14C]2-methylnaphthalene and their bile was examined for metabolites of [14C]2-methylnaphthalene. Trout which were pretreated with the monooxygenase inducer beta-naphthoflavone exhibited greater levels of total metabolites, glucuronide conjugates and dihydrodiol metabolites of [14C]2-methylnaphthalene in bile as compared to non-induced trout. The ratio of 2-hydroxymethyl-naphthalene to dihydrodiols found was greater in non-induced than in induced trout. These results are consistent with previously published studies on the metabolism of [14C]2-methylnaphthalene by rat and trout hepatic microsomes in vitro.