Bioconcentration of haloxyfop-methyl in bluegill (Lepomis macrochirus Rafinesque)

Journal Article · Sun Dec 31 23:00:00 EST 1989 · Environment International; (USA)

DOI:https://doi.org/10.1016/0160-4120(90)90116-N· OSTI ID:5964819

Murphy, P G; Lutenske, N E ^[1]

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1. Dow Chemical Company, Midland, MI (USA)

Bluegill (Lepomis macrochirus Rafinesque) were exposed to a {sup 14}C haloxyfop-methyl (methyl 2-(4-((3-chloro-5-(trifluoromethyl)-2-pyridinyl)oxy)phenoxy)propanoate) concentration averaging 0.29 {mu}g/L under flow-through conditions for 28 days. At the end of 28 days, the fish were transferred to clean water for a 4-day flow-through clearance period. Bluegill were found to rapidly absorb the ester from water which was then biotransformed at an extremely fast rate within the fish, such that essentially no haloxyfop-methyl was detected in the fish. The estimated bioconcentration factor for haloxyfop-methyl in whole fish was <17, based upon the detection limit for the ester in fish (0.005 {mu}g/g) and the average concentration of haloxyfop-methyl in exposure water (0.29 {mu}g/L). The principal component of the {sup 14}C residue within whole fish was haloxyfop acid (2-(4-((3-chloro-5-(trifluoromethyl)-2-pyridinyl)oxy)phenoxy)propanoic acid) which accounted for an average of about 60% of the total radioactivity. The high rate of biotransformation of the parent compound within the fish demonstrates the importance of basing the bioconcentration factor upon the actual concentration of parent material within the organism rather than the total radioactive residue levels for bioconcentration studies with radiolabeled compounds.

• OSTI ID: 5964819
• Journal Information: Environment International; (USA), Journal Name: Environment International; (USA) Vol. 16:3; ISSN 0160-4120; ISSN ENVID
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540311* -- Environment
Aquatic-- Basic Studies-- Radiometric Techniques-- (1990-)
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL ACCUMULATION
CARBON 14 COMPOUNDS
CONTAMINATION
FISHES
HERBICIDES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
METABOLISM
PESTICIDES
TRACER TECHNIQUES
VERTEBRATES