%0 Journal Article
%T EFFECT OF FROZEN Daphnia magna DIET MIXED WITH PROBIOTIC PROTEXIN ON GROWTH AND SURVIVAL OF RAINBOW TROUT (Onchorhynchus mykiss) FRY REARED UNDER CONTROLLED CONDITIONS
%A S. AHMADVAND
%J Online Journal of Animal and Feed Research
%D 2012
%I Science-Line Publication
%X Effect of probiotic Protexin was experimentally tested on growth and survival of rainbow trout fry reared under controlled conditions. Experiments to determine the effect of different levels of probiotic (2กม104 (T1), 2กม105 (T2) and 2กม106 (T3) CFU/g-1) on growth and survival rates of rainbow trout in comparing with those of control diet containing no probiotic were carried out under laboratory conditions. In this trail, frozen Daphnia magna was considered as a basal diet for fry feeding. Rainbow trout offered the control diet exhibited the same growth and feed utilization with all experimental treatments, and no significant differences (P>0.05) in growth were observed among fish groups fed various levels of the probiotic. There was no effect of probiotic inclusion level on water quality. There was no effect of probiotic supplementation on survival at the end of experiment in T1 and T3, but survival rate in T2 was higher than other groups, significantly (P<0.05). Viability against high temperature stress was affected by dietary probiotic inclusion, as supplemented diets by probiotic revealed the better and more efficient results in fish survival. Viability of T2, T3 and control in challenging with high salinity was homogenous, while T1 showed the significant difference (P<0.05) with others, properly.
%K Probiotic
%K growth
%K survival
%K rainbow trout (Oncorhynchus mykiss)
%U http://www.ojafr.ir/main/attachments/article/82/OJAFR,%20B8,%2034-39,%202012.pdf