alexa In vitro and in vivo evaluation of the prebiotics GroBiotic-A, inulin, mannanoligosaccharide, and galactooligosaccharide on the digestive microbiota and performance of hybrid striped bass (Morone chrysops x Morone saxatilis).
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Burr G, Hume M, Ricke S, Nisbet D, Gatlin D rd

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Abstract Two separate experiments were conducted with hybrid striped bass to evaluate four potential prebiotics: GroBiotic-A (partially autolyzed brewer's yeast, dairy ingredient components, and fermentation products), mannanoligosaccharide (MOS), galactooligosaccharide (GOS), and inulin. In the in vitro experiment, intestinal contents were incubated with the individual prebiotics (0.5\% by weight) at 25 degrees C for 24 and 48 h. Analysis of volatile fatty acids in the supernatant showed that GroBiotic-A, MOS, and GOS tended to produce lower acetate levels but higher butyrate levels at 48 h compared to diet alone. However, denaturing gradient gel electrophoresis (DGGE) analysis failed to detect any differences in the composition of the microbial community among treatments. DNA sequencing of a common band for all inoculated samples revealed close similarity to the anaerobic Fusobacteria bacterium. An 8-week feeding trial also was conducted to evaluate the four prebiotics looking at growth performance; weight gain, feed efficiency ratio, protein efficiency ratio, whole-body ash, moisture, and lipid did not vary among fish fed the various diets. However, DGGE analysis revealed that all prebiotics produced a different type of microbial community in the intestinal tract of hybrid striped bass compared to fish fed the basal diet. Thus, GroBiotic-A, FOS, GOS, and MOS exhibited prebiotic effects in hybrid striped bass. This article was published in Microb Ecol and referenced in Journal of Aquaculture Research & Development

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