Response and Recovery of Brain Acetylcholinesterase Activity in Atlantic Salmon ( Salmo salar ) Exposed to Fenitrothion

• Published in: Canadian Journal of Fisheries and Aquatic Sciences
• Main Authors: Morgan, M. J., Fancey, L. L., Kiceniuk, J. W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1990
• Subjects: Aquatic Science; Ecology, Evolution, Behavior and Systematics; Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1139/f90-188; http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-188

Atlantic salmon (Salmo salar) parr were exposed to a number of concentrations of either technical grade fenitrothion or an operational formulation of the pesticide for 7 d or to the operational formulation for two, 24 h periods separated by 7 d. Brain acetylcholinesterase (AChE) activity decreased as concentration, of fenitrothion increased. Recovery period was directly related to amount of depression, with recovery of AChE from exposure to 0.004 μL/L fenitrothion taking less than 1 wk. Samples must be taken soon after spray operations to detect exposure to such low levels of fenitrothion through AChE monitoring.