Susceptibility to oxidative damage in wild and cultured Brook Trouts (Salvelinus Fontinalis Mitchill, 1815)

Abstract

The aim of this study was to determine susceptibility to oxidative damage of wild (WBT) and cultured brook trout (CBT) (Salvelinus fontinalis Mitchill, 1815). The average weights of fish were 90 g and 60 g for CBT and WBT, respectively. Fishes used in the present work were randomly selected from ponds and pool. Fifteen fish were considered for each group. CBT were fed with commercial feed including 48-52% crude protein twice a day whereas WBT were fed with natural foods. At end of experiment, the levels of MDA, HDL and PON/HDL in the serum samples obtained from CBT was observed higher than the one obtained from WBT. However, these differences were found statistically insignificant. Our results showed that size, partial starvation, feeding and sex of the animal, stress in same fish species may be reason for the change of PON activity, MDA and HDL levels.