1. Growth, digestive capacity and intestinal microflora of juvenile Jian carp ( Cyprinus carpio var. Jian) fed graded levels of dietary inositol.
- Author
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Wei-Dan Jiang, Lin Feng, Yang Liu, Jun Jiang, and Xiao-Qiu Zhou
- Subjects
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CARP , *FISH growth , *INFECTIONS in fish , *FISH nutrition , *DIETARY supplements , *INOSITOL , *MICROORGANISM populations , *DIGESTIVE enzymes , *ESCHERICHIA coli , *AEROMONAS hydrophila , *HEALTH , *THERAPEUTICS ,FISH digestive organs - Abstract
A 60-day feeding trial was carried out with juvenile Jian carp ( Cyprinus carpio var. Jian) to study the effects of myo-inositol (MI) on the growth, digestive enzyme and intestinal microbial population. Diets with seven levels of inositol (163.5, 232.7, 384.2, 535.8, 687.3, 838.8 and 990.3 mg MI kg−1 diet) were fed to Jian carp (initial weight 22.28±0.07 g). Per cent weight gain (PWG) was improved with increasing inositol levels up to 535.8 mg MI kg−1 diet ( P<0.05), and plateaued ( P>0.05). The protein production value, lipid production value and ash production value were increased with increasing dietary inositol levels up to 384.2, 838.8 and 838.8 mg MI kg−1 diet respectively ( P<0.05). Although intestinal protein content and trypsin activity were not affected by inositol levels ( P>0.05), chymotrypsin, lipase and amylase activities in intestine were the lowest for fish fed the MI-unsupplemented diet ( P<0.05). Alkaline phosphatase, Na+, K+-ATPase, γ-glutamyl transpeptidase and creatinkinase activities in the intestine were increased with an increase in the inositol levels up to 384.2–687.3 mg MI kg−1 diet ( P<0.05). Intestinal Aeromonas hydrophila and Escherichia coli decreased with an increase in the levels of dietary inositol up to 232.7 and 687.3 mg MI kg−1 diet respectively ( P<0.05), while Lactobacillus in the intestine increased with an increase in inositol levels up to 990.3 mg MI kg−1 diet ( P<0.05). In conclusion, inositol improved growth, digestive capacity and intestinal microbial population of juvenile Jian carp, and the dietary inositol requirement for PWG of juvenile Jian carp is 518.0 mg MI kg−1 diet. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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