چکیده انگلیسی:
Fish larvae experience major cellular and biochemical changes during their early life stages. The aim of the present study was to evaluate alterations in the antioxidant status and values of lipid peroxidation and vitamin C content during the different life developmental stages of Hypophthalmichthys molitrix. Eggs and larvae were sampled at fertilization, organogenesis, eyed egg, hatch, active feeding, and 14 and 21 days after active feeding. An age dependent significant variation in SOD activity was seen during the period of study as the highest activity recorded at the eyed egg stage (P<0.05). Meanwhile, the activity of GPX and CAT did not show any significant changes in this study (P>0.05). The overall trend of MDA concentration showed significant increase from fertilization toward 21 days after fertilization (P<0.05). Vitamin C content showed an opposite pattern and decreased during the period of study (P<0.05). It can be concluded that vitamin C plays a crucial role in the antioxidant defence system during the early life stages of H. molitrix as could prevent from increase of MDA content till active feeding.
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