摘要
The influence of Bacillus probiotics on the digestive enzyme activity and the growth of Litopenaeus vannamei were de- termined in this study. The shrimp was treated with five percentages (1.5, 3.0, 4.5, 6.0 and 7.5) of probiotics (Bacillus spp.) supple- mented to the feed and cultured for 45 d. The growth measured as the weight gain at the end of culturing was significantly (P<0.05) higher in probiotic-treated shrimps than that of the control (without receiving probiotics). Activities of protease and amylase, two digestive enzymes of the midgut gland and the intestine were significantly (P<0.05) higher in probiotic-treated shrimp than in the control.
The influence of Bacillus probiotics on the digestive enzyme activity and the growth of Litopenaeus vannamei were determined in this study. The shrimp was treated with five percentages （1.5, 3.0, 4.5, 6.0 and 7.5） of probiotics （Bacillus spp.） supplemented to the feed and cultured for 45 d. The growth measured as the weight gain at the end of culturing was significantly （P〈0.05） higher in probiotic-treated shrimps than that of the control （without receiving probiotics）. Activities of protease and amylase, two digestive enzymes of the midgut gland and the intestine were significantly （P〈0.05） higher in probiotic-treated shrimp than in the control.
