Alterations in antioxidant defence in the early life stages of silver carp, Hypophthalmichthys molitrix

Document Type: Research Paper

Authors

1 Department of Fisheries, Pardis Campus, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran

2 Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran

3 Department of Biochemistry, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran

4 Department of Physical Oceanography, Faculty of Marine Sciences, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran

Abstract

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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