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Effects of dietary propolis and vitamin E on growth performance and antioxidant status in juvenile rainbow trout ( O ncorhynchus mykiss ) under different flow rate
Author(s) -
Tuna Keleştemur Gülüzar,
Seven İsmail
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03122.x
Subject(s) - rainbow trout , propolis , biology , vitamin e , juvenile , zoology , trout , weight gain , vitamin , antioxidant , malondialdehyde , endocrinology , body weight , food science , fish <actinopterygii> , fishery , biochemistry , ecology
The present study investigated the effects of propolis and vitamin E supplementation in diets of juvenile rainbow trout subjected to two different flow rates (0.9 and 2.1 L min −1 ) on growth performance, and vitamin A , C and E concentrations in tissues as well as malondialdehyde ( MDA ) levels. Juvenile rainbow trout were fed with diets containing 10 and 30 g propolis kg −1 , 60 mg kg −1 vitamin E ( R ovimix E ‐50 adsorbate; min.%50 dl‐α‐tokopherly acetate) and without supplemented basal diet for 12 weeks. Weight gain ( WG ) in the C group was significantly lower ( P < 0.05) than P 10, P 30 and E 60 groups at both flow rate treatments. At 2.1 L min −1 , specific growth rate ( SGR ) in the C group was significantly lower ( P < 0.05) than other groups, but at 0.9 L min −1 , SGR of fish did not differ among the diets groups ( P > 0.05). Survival rate ( SUR ) was higher in propolis and vitamin E supplemented diet groups ( P < 0.05) than control diet group at 0.9 L min −1 . Fish fed on diet E 60 had higher ( P < 0.05) tissue vitamin E concentration than fishes fed on other diets groups. Vitamin C concentration in rainbow trout tissues was significantly affected by the 30 g propolis supplemented diet group ( P < 0.05), followed by the 10 g propolis supplemented diet group ( P < 0.05). MDA level of E 60 group was found significantly decreased instead of different than other groups ( P < 0.05). The results of Student's t ‐test revealed that WG , SGR , SUR values, vitamin ( A , C , E ) concentrations and MDA levels of tissues were negatively affected by 0.9 L min −1 flow rate treatment in juvenile rainbow trout.