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Inbaraj RM, Haider S: Effect of malathion and endosulfan on brain acetylcholinesterase and ovarian steroidogenesis of Channa punctatus (Bloch). Ecotoxicol Environ Saf. 1988 Oct;16(2):123-8.
The effect of sublethal concentrations of malathion (organophosphorus insecticide) and endosulfan (organochlorine insecticide) was investigated in Channa punctatus. Brain acetylcholinesterase (AchE) and ovarian delta 5,3 beta-hydroxysteroid dehydrogenase (delta 5,3 beta-HSD) and glucose-6-phosphate dehydrogenase (G-6-PD) activities were studied. Apart from the loss of stage II and III oocytes, the absence of delta 5,3 beta-HSD and G-6-PD activity indicating the inhibition of steroidogenesis was seen in the malathion- and endosulfan-treated fish ovaries. Malathion demonstrated a dose-dependent inhibition of brain AchE activity, whereas endosulfan caused no significant reduction of AchE activity. |
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