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The effects of temperature, salinity and a simulated tidal cycle on the toxicity of fenitrothion to Callinectes sapidus

1985; Elsevier BV; Volume: 80; Issue: 1 Linguagem: Inglês

10.1016/0742-8413(85)90146-x

1878-1969

John J. Johnston, Michael D. Corbett,

Animal Ecology and Behavior Studies

The 96 hr LC50 for Callinectes sapidus exposed to fenitrothion at 22 degrees C and a salinity of 34 ppt (parts per thousand) was estimated to be 8.6 micrograms/l with a 95% confidence interval of 7.4-9.9 micrograms/l. Acute toxicity was shown to increase with increasing temperature as well as increasing salinity. Exposure of Callinectes to a simulated tidal cycle of 17 ppt salinity change at 6 hr intervals increased the acute toxicity of fenitrothion to Callinectes. The autotomization response in Callinectes was shown to be affected at subacute exposure levels as low as 0.1 microgram/l.