Acute toxicity of three organophosphorus pesticides to juveniles Mytilus coruscus Gould

Abstract:

Acute toxicity of triazophos, acephate and dichlorvos on Mytilus coruscus juveniles were studied in aquaculture laboratory of Zhejiang Ocean University in August 2007. The result indicated that the median lethal concentrations (LC50) of triazophos at 24,48,72 and 96hours to Mytilus coruscus juveniles were 105065 mg/L,103518 mg/L,102057mg/L and 97150 mg/L, respectively. LC50 of acephate at 24,48,72 and 96hours to Mytilus coruscus juveniles were 1 537437mg/L,1493609mg/L,1 433898 mg/L and1 357158mg/L, LC50 of acephate at 24,48,72 and 96hours to Mytilus coruscus juveniles were 3796 mg/L,3612 mg/L,3347 mg/L and 3067 mg/L. At the same time,it is discovered that the safety concentrations(SC) of triazophos, acephate and dichlorvos on Mytilus coruscus juveniles were 9715 mg/L,135716 mg/L and 0307 mg/L. So the toxicity of the three pesticides to Mytilus coruscus juveniles ranked as dichlorvos＞triazophos＞acephate.Finally,the acute toxicity effects, death jump characteristics and SC of triazophos, acephate and dichlorvos on Mytilus coruscus juveniles were discussed.