The efficiency of Lactobacillus plantarum in diet for juvenile Japanese flounder Paralichthys olivaceus reared in a closed recirculating system
2008
Taoka, Y.(Miyazaki Univ. (Japan). Faculty of Agriculture) | Yuge, K. | Maeda, H. | Koshio, S.
A study was conducted to examine the effect of probiotics on the growth performance and survival of juvenile Japanese flounder, water quality, bacterial number and tolerance to stress. In the present study, Lactobacillus plantarum (LP) was orally gave to juvenile Japanese flounder, Paralichthys olivaceus by feeding at two levels, 0.1% and 1.0% in the diet (the 0.1% LP group and 1.0% Lp group, respectively), and fish were reared in a closed recirculating system for 50 days. The survival rate and growth performance of flounder, and water quality were not affected by oral administration of LP By feeding a diet with LP, the number of Lactobacillus sp. in the rearing water and the intestine increased, particularly in the 1.0% LP group. In fish that received diets containing LP, the better tolerance to high temperature was observed significantly as compared to those receiving LP free diet. This study suggested that LP orally administered could survive in the intestine of flounder and might be effective to enhance stress tolerance of P. olivaceus.
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