Journal
AQUACULTURE NUTRITION
Volume 22, Issue 2, Pages 352-366Publisher
WILEY
DOI: 10.1111/anu.12264
Keywords
antioxidant status; Cyprinus carpio var; Jian; growth; intestinal bacteria; intestinal enzyme activity; vitamin K
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Funding
- National Department Public Benefit Research Foundation (Agriculture) of China [201003020]
- Science and Technology Support Programme of Sichuan Province of China [2011NZ0071]
- Major Scientific and Technological Achievement Transformation Project of Sichuan Province of China [2012NC0007]
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A total of 1400 juvenile Jian carp (Cyprinus carpio var. Jian) (8.93 +/- 0.03g) were fed diets containing graded levels of vitamin K at 0.027 (basal diet), 1.52, 3.02, 4.51, 6.02 and 7.52mgkg(-1) diet for 60days to investigate the effects of vitamin K on growth, enzyme activities and antioxidant capacity in the hepatopancreas and intestine. Percentage weight gain (PWG), feed intake and feed efficiency of fish were improved by vitamin K. Activities of trypsin, chymotrypsin, amylase and lipase in the intestine and hepatopancreas and Na+, K+-ATPase, creatine kinase, alkaline phosphatase and gamma-glutamyl transpeptidase in the intestine were increased by vitamin K. Malondialdehyde and protein carbonyl contents in the hepatopancreas and intestine were decreased with vitamin K supplements. Certain level of vitamin K increased antihydroxyl radical, antisuperoxide anion, superoxide dismutase, catalase, glutathione-S-transferase, glutathione peroxidase and glutathione reductase activities and glutathione contents in the hepatopancreas and intestine. Intestinal Lactobacillus, E.coli and Aeromonas were changed with vitamin K supplements. Together, these results indicate that vitamin K improved fish growth, digestive and absorptive ability, and anti-oxidant capacity. The dietary vitamin K requirement of juvenile Jian carp (8.93-73.7g) based on PWG was 3.13mgkg(-1) diet.
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