Influence of factors related to the intestinal digestion and absorption on growth of cultured large yellow croaker Pseudosciaena crocea
LI Ying-ying1,2, CHEN Xi2, LI Su-yi2, LI Pan1,2, LI Yan-hong2, SONG Tie-ying2
1.College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2.Institute of Biotechnology, Fujian Academy of Agricultural Science, Fuzhou 350003, China
Abstract: The activities of digestive enzymes and bacterial account were investigated in intestine by enzyme analysis and by Quantitative Real-time PCR (qPCR), and the differences in intestinal morphology was histologically observed in large (body weight of 60-100 g) and small (body weight of 10-40 g) yellow croaker Pseudosciaena crocea sampled from 300 days old fishes cultured in cages in a farm in Lianjiang county, Fuzhou, to explore the reason why the same patch fish in the same cage showed different growth under the same condition. The results showed that no significant differences in the activities of digestive enzymes were found between the large and small large yellow croaker groups (P>0.05). However, the quantity of facultative anaerobic bacteria including Vibrio and Saccharomycetes cerevisiae was higher in the intestine in the smaller large yellow croaker group than that in the larger one group, significant differences in the quantity of S.cerevisiae between the two groups (P<0.05). Lower villus density was observed in the intestine of the smaller-sized fish group compared to the larger-sized one with dense, slender and integrity villus. There was significant more lymphocytes in the anterior intestine in the smaller-sized fish group than that in the larger-sized one(P<0.05). The findings demonstrated that the growth rate of the fish was correlated to the microbiology and the state of villus rather than the activities of digestive enzymes.
李英英, 陈曦, 李素一, 李盼, 李艳虹, 宋铁英. 肠道消化吸收相关因子对大黄鱼生长速度的影响[J]. 大连海洋大学学报, 2015, 30(3): 271-275.
LI Ying-ying, CHEN Xi, LI Su-yi, LI Pan, LI Yan-hong, SONG Tie-ying. Influence of factors related to the intestinal digestion and absorption on growth of cultured large yellow croaker Pseudosciaena crocea. Journal of Dalian Ocean University, 2015, 30(3): 271-275.
2015, Vol. 30 
