Probiotic applications for rainbow trout (Oncorhynchus mykiss Walbaum) I. Effects on growth performance, feed utilization, intestinal microbiota and related health criteria

被引:139
|
作者
Merrifield, D. L. [1 ]
Dimitroglou, A. [1 ]
Bradley, G. [1 ]
Baker, R. T. M. [1 ]
Davies, S. J. [1 ]
机构
[1] Univ Plymouth, Aquaculture & Fish Nutr Res Grp, Sch Biol Sci, Plymouth PL4 8AA, Devon, England
关键词
growth; health; probiotic; rainbow trout; LABEO-ROHITA HAM; SALMO-SALAR L; BACILLUS-SUBTILIS; IMMUNE-RESPONSE; LACTOBACILLUS-RHAMNOSUS; ENTEROCOCCUS-FAECIUM; GUT MICROBIOTA; MICROFLORA; BACTERIA; FISH;
D O I
10.1111/j.1365-2095.2009.00689.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The effect of dietary probiotics (Bacillus subtilis, Bacillus licheniformis and Enterococcus faecium) used singularly and synergistically on the growth performance, intestinal microbiota and health status of rainbow trout (Oncorhynchus mykiss Walbaum) were assessed after 10 weeks feeding on supplemented diets. No significant improvements of weight gain or specific growth rate were observed in the probiotic fed groups. However, a significant improvement of feed conversion ratio was observed in the group fed E. faecium. High levels of probiotic species were observed in the posterior gastrointestinal tract as transient digesta-associated populations and potentially resident mucosal populations. Bacillus subtilis and B. licheniformis levels accounted for 36% of the total culturable microbial population adhered to the mucosa and 62% in the digesta. E. faecium levels accounted for 45% of the mucosal population and 89% of the population in the digesta. An increase of serum lysozyme activity was observed in the fish fed diets containing the Bacillus probionts and elevated leukocyte levels were observed in fish fed diets containing Bacillus + E. faecium synergistically. The results of the current study demonstrate potential for B. subtilis, B. licheniformis and E. faecium to improve feed utilization, modulate intestinal microbiota and the health status of rainbow trout.
引用
收藏
页码:504 / 510
页数:7
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