Dawson, V. K., Schreier, T. M., Boogaard, M. A., Spanjers, N. J., and Gingerich, W.
H., 2002, Rapid loss of lampricide from catfish and rainbow trout following routine
treatment: Journal of Agricultural and Food Chemistry, v. 50, no. 23, p. 6780-6785. 

Abstract

Rainbow trout (Oncorhynchus mykiss) and channel catfish (Ictalurus punctatus) were
exposed to 3-trifluoromethyl-4-nitrophenol (TFM) and Bayluscide (niclosamide)
during a sea lamprey control treatment of the Ford River, located in the upper
peninsula of Michigan. Caged fish were exposed to a nominal concentration of 0.02
mg/L of niclosamide for a period of approximately 12 h. Samples of fillet tissue were
collected from each fish species before treatment and at 6, 12, 18, 24, 48, 96, and 192
h following the arrival of the block of chemical at the exposure site. The fish were
dissected, homogenized, extracted, and analyzed by high-performance liquid
chromatography. The major residues found in the fillet tissues were TFM and
niclosamide. Niclosamide concentrations were highest 12 h after arrival of the
chemical block for rainbow trout (0.0395 +/- 0.0251 mug/g) and 18 h after arrival of
the chemical block for channel catfish (0.0465 +/- 0.0212 mug/g). Residues decreased
rapidly after the block of lampricide had passed and were below the detection limits
in fillets of rainbow trout within 24 h and channel caff ish within 96 h after the arrival
of the lampricide.

Keywords

lampricide, Bayluscide, niclosamide, residues, fish, 3-trifluoromethyl-4-nitrophenol,
glucuronide