title: Relatively rapid loss of lampricide residues from fillet tissue of fish after routine treatment.
abstract: The selective sea lamprey (Petromyzon marinus) larvicide 3-trifluoromethyl-4-nitrophenol (TFM) is currently used to control parasitic sea lampreys in tributaries to the Great Lakes basin. The concentration and persistence of TFM and its major metabolite, TFM glucuronide (TFM-glu), was determined in fillet tissue of fish after a typical stream application. Rainbow trout (Oncorhynchus mykiss) and channel catfish (Ictalurus punctatus) were exposed to a nominal concentration of 12.6 nmol/mL TFM for about 12 h during a sea lamprey control treatment of the Ford River in Michigan. Concentrations of TFM and TFM-glu were greatest in the fillet tissues during the exposure period, with greater residues in channel catfish (wet wt; mean, 6.95 nmol/g TFM; mean, 2.40 nmol/g TFM-glu) than in rainbow trout (wet wt; mean, 1.45 nmol/g TFM; mean, 0.93 nmol/g TFM-glu). After the exposure period, residues in both species decreased by 90-99% within 6-12 h and were less than the quantitation limit (<0.03 nmol/g) within 36 h.
authors.affiliation: U.S. Geological Survey, Biological Resources Division, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, Wisconsin 54603, USA. M.Schirra@imfpp.ss.cnr.it
authors.forename: Chue
authors.initials: C
authors.lastname: Vue
authors.forename: Jeffry A
authors.initials: JA
authors.lastname: Bernardy
authors.forename: Terrance D
authors.initials: TD
authors.lastname: Hubert
authors.forename: William H
authors.initials: WH
authors.lastname: Gingerich
authors.forename: Guy R
authors.initials: GR
authors.lastname: Stehly
mesh_terms: D000818:Animals; D007059:Ictaluridae / Q000378:metabolism*; D007700:Kinetics; D007798:Lampreys; D008824:Michigan; D009596:Nitrophenols / Q000008:administration & dosage / Q000032:analysis / Q000493:pharmacokinetics*; D017686:Oncorhynchus mykiss / Q000378:metabolism*; D010571:Pest Control; D010573:Pesticide Residues / Q000032:analysis / Q000493:pharmacokinetics*
chemical_list: D009596:Nitrophenols; D010573:Pesticide Residues; C003687:3-trifluoromethyl-4-nitrophenol