Volume 3, Issue 3 (2014)                   JFST 2014, 3(3): 1-11 | Back to browse issues page

‎ 20.1001.1.23225513.1393.3.3.1.6

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Sargazi H, Jafarian H, Yelghi S, Farhangi M. Stress Resistance, Survival and Growth Performance of Rainbow Trout Fry(Oncorhynchus mykiss) Supplemented with a Commercial Basillus Probiotic. JFST 2014; 3 (3) :1-11
URL: http://jfst.modares.ac.ir/article-6-1386-en.html
Stress Resistance, Survival and Growth Performance of Rainbow Trout Fry(Oncorhynchus mykiss) Supplemented with a Commercial Basillus Probiotic
Hakimeh Sargazi * 1, Hojat Jafarian2 , Saeed Yelghi3 , Mohammad Farhangi2
1- university of Gonbad
2- University of Gonbad
3- fishery Research Center
Abstract:   (10337 Views)
The effect of a probiotic containing five species of bacilli at four levels of 0 (control), 1×106CFU/ml (T1), 1×107 CFU/ml (T 2) and 1×108CFU/ml (T 3) per 100g of feed on the growth performances, resistance and survival of rainbow trout fry, Oncorhynchus mykiss (463±32 mg) were compared in a  60-days feeding trial. Growth parameters, such as ADG, SGR, RGR and TGC, were significantly enhanced (p<0.05) by the probiotic at all levels, and the performance in T2 was significantly better than T1. The fish under the probiotic treatments also showed higher resistance (p<0.05) to such Environmental stresses as alkaline pH, heat and ammonia (p<0.05). No significant difference in tolerance to acidic pH stress was observed between the control and treatments. In conclusion, the probiotic bacillus highly increased the growth performances, feeding efficiency, resistance and survival in rainbow trout fry.
Keywords: probiotic, stress, Growth performances, Feeding Efficiency
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Article Type: Research Article | Subject: Fish diseases|Fis nutrition|Aquaculture
Received: 2014/01/30 | Published: 2014/11/22
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