Abstract
Pink salmon ( Oncorhynchus gorbuscha) and chum salmon ( O. keta) fry cultured in tri-n-butyltin (TBT) treated marine net-pens for 20–68 days were tested just prior to release into the ocean to determine whether TBT contamination had occurred and, if so, to what extent. Exposed fry contained 0.2–7.3 μg TBT/g fish at the time of release; TBT concentrations varied substantially among the netpen populations. Unusually high mortalities or poor growth rates were not observed. TBT was not detected in the returning adults.
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