Toxic effects of acute exposure of diazinon in turbot [Psetta maxima] early life stage [ELS]

ABSTRACT

In the present study, the toxic effects on the embryos and larvae of the turbot were used as a model to investigate the diazinon, which contaminates aquatic ecosystems. The number of dead embryos significantly increased in response to diazinon concentrations 0.2, 0.4, 0.8, 1.6, 3.2, and 7.4 mg/L. The 48h LC[50] value of diazinon for turbot embryos was estimated at 1.85 mg/L. Dose-response decreases in hatching success were recorded as 97, 92.4, 80.3, 60.3, 38.7 and 27.1%, respectively. The number of dead larvae significantly increased with increasing diazinon concentrations exposed for 24-96 h [p < 0.05]. The 24, 48, 72 and 96h LC[50] values of diazinon for turbot larvae were estimated at 4.8 [6.4-5.12], 3.3 [4.73-2.52], 2.1 [3.29-1.65] and 1.23 [0.87-2.38] mg/L, respectively. There were significant differences in the LC[50] values obtained at different exposure times [p <0.05]. Diazinon caused lethal toxicity as well as nonlethal malformations during embryo-larvae development