Organochlorines, Organophosphates, and Pyrethroids in Channel Catfish, Rainbow Trout, and Red Swamp Crayfish from Aquaculture Facilities

Channel catfish ( Ictalurus punctatus ), rainbow trout ( Oncorhynchus mykiss ), and red swamp crayfish ( Procambarus clarkii ) were collected from 8 southern states in the United States and analyzed for 34 organochlorine, organophosphate, and pyrethroid compounds. Approximately 45% of catfish, 72% of trout, and 92% of crayfish contained no detectable residues. Most residues detected were well below action limits for fish. Chlorpyrifos, for which there is no established tolerance, was detected in catfish; however, residues of this pesticide were not detected in samples collected after the 1st year of the study. The data collected during this study further support the safety of aquaculture products.