Open AccessComparisons of Uptake and Depuration of 2‐Methylisoborneol in Male, Female, Juvenile, and 3MC‐induced Channel Catfish Ictalurus punctatus
Author(s) -
Perkins Everett J.,
Schlenk Daniel
Publication year - 1997
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1997.tb00851.x
Subject(s) - ictalurus , catfish , juvenile , biology , ictaluridae , fish <actinopterygii> , zoology , fishery , toxicology , environmental chemistry , ecology , chemistry
The occurrence of off‐flavors in farm‐raised channel catfish is a major burden to the catfish culture industry, causing millions of dollars worth of market‐ready fish to be rejected each year. Off‐flavors are believed to be the result of exposure and subsequent accumulation of certain volatile microbial metabolites such as 2‐methylisoborneol. In this study, the uptake and elimination of [ 14 C]‐2‐methylisoborneol equivalents were examined in juvenile and mature channel catfish. The described method is presented as a simple and inexpensive procedure for comparing treatment effects on off‐flavor elimination rates. In addition, the effects of the cytochrome P4501A inducing agent 3‐methylcholanthrene on 2‐methylisoborneol depuration was studied in juvenile fish. Uptake was determined during a 24–h static exposure to waterborne 2‐methylisoborneol (7.6 ± 3.7 μg/L). Uptake equilibrium had been established in all groups by 12 h, with total uptake higher in juvenile fish. Depuration rates were not different between untreated groups (t ½ a = 12.r122.4 h; t ½ β= 91.3–143.7 h); however, the depuration half‐lives for 3‐methylcholanthrene treated juveniles were significantly longer than those of controls.