نوع مقاله : مقاله پژوهشی
گروه شیلات دانشگاه گنبد کاووس، دانشکده منابع طبیعی.
عنوان مقاله [English]
This study aimed to evaluate the effect of probiotic Bacilli on some growth parameters and their stress resistance of common carp. This experiment was conducted in two treatments, each with three replicates. The bioaugmentor bacterial strain Bacillus licheniformisi, B. subtilis, B. polymyxa, B. laterosporus and B. circulans (Protexin Aquatech, UK) were used in this study. The effluent or waste water of common carp cultivation system was used in this experiment. In trial of probiotic (T1), the blend of bacillus were added to the waste water in bacterial treatment tanks at a concentration of 1×108 CFU/ liter. In treatment of T2 tap water were used. At the end of experiment (45 days), the mean weight, FCR, SGR(%), RGR(%), FCE(%), RFI(%), ADG(%), PER and LER (P<0.05) of common Carp fry in T1 (rearing in treated waste water) had good result in comparison with T2 (rearing in tap water). The fishes reared in T1 in comparison with T2 had higher resistence stress (P<0.05). The results indicated that the addition of the probiotic bacillus in the rearing tank of Common Carp can increase the feeding parameters and stress tolerance in Common Carp fry under unfavorable environmental condition.