Seasonal effects of leached mirex on selected estuarine animals.

Archives of Environmental Contamination and Toxicology
M E TagatzJ Forester

Abstract

Four 28-day seasonal experiments were conducted using selected estuarine animals in outdoor tanks that received continuous flow of mirex-laden water. Mirex (dodecachlorooctahydro-1,3,4-metheno-2H-cyclobuta [cd] pentalene) leached from fire ant bait (0.3% mirex) by fresh water and then mixed with salt water was toxic to blue crabs (Callinectes sapidus), pink shrimp (Penaeus duorarum), and grass shrimp (Palaemonetes pugio) but not to sheepshead minnows (Cyprinodon variegatus), at concentrations less than 0.53 mug/L in water. The amount of leaching was greatest in summer and least in spring. Greatest mortality occurred in summer at the highest water temperature and concentration of mirex; least mortality occurred in spring at the next to the lowest temperature and at the lowest concentration. Earliest deaths of blue crabs occurred after six days of exposure and shrimps after two days. Small juvenile crabs were more sensitive to leached mirex than were large juveniles. Mirex did not appear to affect growth or frequency of molting in crabs. All exposed animals concentrated mirex. Among animals that survived for 28 days, sheepshead minnows concentrated mirex 40,800X above the concentration in the water, blue crabs 2,300X, pink shrimp...Continue Reading

References

Nov 1, 1972·The Journal of protozoology·N R CooleyJ Forester
Aug 1, 1973·Bulletin of Environmental Contamination and Toxicology·H L CollinsG P Markin
Jan 1, 1971·Bulletin of Environmental Contamination and Toxicology·J L LudkeC Lusk
Mar 1, 1970·Bulletin of Environmental Contamination and Toxicology·T W DukeA J Wilson

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Citations

Sep 1, 1981·Archives of Environmental Contamination and Toxicology·H O SandersD Skaar
Feb 1, 1979·Bulletin of Environmental Contamination and Toxicology·W P Schoor
Jan 1, 1976·Archives of Environmental Contamination and Toxicology·M E TagatzJ Knight
Oct 1, 1977·Environmental Research·E M WatersH B Gerstner

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