Effects of different probiotic bacteria on growth, body composition, immune response and hematological parameters of rainbow trout (Oncorhynchus mykiss) under sublethal water temperature
Journal Title: Marine Science and Technology Bulletin - Year 2015, Vol 4, Issue 2
Abstract
The aim of this study was to evaluate the effects of probiotic bacteria Lactobacillus plantarum, Bacillus subtilis and their mix additives on growth performance, body composition, immune response and hematological parameters of rainbow trout (Oncorhynchus mykiss) under sublethal water temperature. Feeding trial was carried out for 60 days. The first group was fed with commercial feed plus fish oil. The second and third groups were given commercial feed plus Lactobacillus plantarum and Bacillus subtilis at a rate of 107 CFU g-1 fish oil, respectively. The fourth group was also fed with commercial feed plus 50% of both probiotic bacteria. After 60 days, there were no differences among the survival rates and body proximate composition of experimental groups. Results also showed that all additives (L. plantarum, B. subtilis and their mix) to diets had no significant effect on growth parameters of rainbow trout, although the fish fed the diet with L. plantarum had statistically better feed conversion ratio (FCR) compared to the other groups (p<0.05). However, the additives could improve the immunity and alter hematological parameters of the rainbow trout. In conclusion, it might be suggested that L. plantarum can be used as a beneficial dietary probiotic in rainbow trout reared under sublethal water temperature.
Authors and Affiliations
Irfan Selcuk Yazici, Olcay Hisar, Sevdan Yilmaz, Murat Yigit
Keywords
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