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- W2022677178 abstract "The bioconcentration and elimination rates of lamprey larvicide, 14 C-TFM (3-trifluoromethyl-4-nitrophenol), were determined for 20 plant and animal species during experimental lamprey control treatments in six indoor model streams. A two-component curve consisting of a rapid initial uptake rate during the first 2 h followed by a reduced linear rate for the remainder of the 24-h exposure best describes the uptake curve for all species examined. The bioconcentration factors (BCF) ranged from 1.1 to 95.5 for animal components and from 0.7 to 12.2 for the plant species. Macroinvertebrate species with soft, relatively permeable integuments accumulate significantly higher residue concentrations (mean BCF = 45.0) than those species with hard chitinized or calcareous exoskeletons (mean BCF = 11.9). Rates of uptake during the linear phase range from 0.36 μg∙g −1 ∙h −1 for the crayfish Orconectes propinquus to 17.9 μg∙g −1 ∙h −1 for the caddisfly larvae Brachycentrus americanus.Rates of loss of TFM accumulations correlate with water current and substrate associations. The mean half-life of TFM is 17.8 h for riffle species and 105.9 h for pool-dwelling species. Half-life figures vary from 7.2 h for the crayfish to 5295 h for annelid worms. The longer half-lives observed for several pool species suggest continued accumulation of 14 C-labeled residues from the organic matter of the pool bottoms." @default.
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- W2022677178 date "1977-02-01" @default.
- W2022677178 modified "2023-09-26" @default.
- W2022677178 title "Kinetics of Lampricide (TFM, 3-trifluoromethyl-4-nitrophenol) Residues in Model Stream Communities" @default.
- W2022677178 doi "https://doi.org/10.1139/f77-042" @default.
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