Bluegill fingerlings, Lepomis macrochirus, exposed to six different pesticide formulations, developed hemorrhaging and fractures of the caudal vertebrae 4 to 8 hours after treatment. Fish exposed to Dyrene(R) Akton(R), methyl parathion, trichlorfon, phosalone and demeton developed vertebral injury. Injury was observed at concentrations above and below the LC50for each chemical. Disturbance of fish during the early hours of exposure increased mortality and hemorrhage rates. (Use of trade names does not constitute endorsement by the U.S. Environmental Protection Agency.)

No abstract

No abstract

No abstract

No abstract