Dietary Administration of Probiotics Modulates Non-Specific Immunity and Gut Microbiota of Nile Tilapia (Oreochromis Niloticus) Cultured In Low Input Ponds
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Date
2019
Authors
Opiyo, Mary A
Jumbe, James
Ngugi, Charles C
Charo-Karisa, Harrison
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor \& Francis
Abstract
Poor culture conditions in low input ponds make fish highly susceptible to infectious
pathogens which lead to diseases and mortalities yet the effects of probiotics on immunity, gut microbiota and microbiological quality of fish in low input ponds are unknown.
Nile tilapia, Oreochromis niloticus fingerlings (40 g) were randomly stocked at 50 fish m−3
in 1.25 m3 cages in low input ponds. The fish were fed on diets supplemented with either
Saccharomyces cerevisiae (1 × 1010 CFU g−1
) or Bacillus subtilis (1 × 109 CFU g−1
) at six
levels: Diet 0 (No probiotic); S. cerevisiae at 2 g kg−1 (Diet 1); 4 g kg−1 (Diet 2) and 6 g kg−1
(Diet 3) and B. subtilis at 5 g kg−1 (Diet 4); 10 g kg−1 (Diet 5) and 15 g kg−1 (Diet 6) for 180
days. Results indicate that hemato-immunological parameters (hemoglobin (Hb), red
blood cells (RBC), white blood cells (WBC) serum protein, albumin, globulin and lysozyme
activity) were significantly higher in fish fed on probiotic treated diets compared to the
control (P < 0.05). On the contrary, fish fed on Diet 6 presented significantly similar Hb
and globulin values compared to the control (P > 0.05). Additionally, fish fed on probiotic
treated diets retained the probiotics in their guts and lower microbial load was realized in
their muscle (P < 0.05). In conclusion, B. subtilis and S. cerevisiae supplementation in diets
of Nile tilapia reared in low input ponds improves immunity, manipulates gut microbiota
and enhances fish flesh quality
Description
Article
Keywords
Bacillus subtilis, immunity, Nile tilapia, probiotics, Saccharomyces cerevisiae
Citation
Opiyo, M. A., Jumbe, J., Ngugi, C. C., & Charo-Karisa, H. (2019). Dietary administration of probiotics modulates non-specific immunity and gut microbiota of Nile tilapia (Oreochromis niloticus) cultured in low input ponds. International journal of veterinary science and medicine, 7(1), 1-9.