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Articles by Jin Niu
Total Records ( 2 ) for Jin Niu
  Jin Niu , Yong-Jian Liu , Li-Xia Tian , Kang-Sen Mai , Qi-Cun Zhou , Hui-Jun Yang and Chao-Xia Ye
  This experiment was conducted to evaluate the effects of dietary lipid sources on growth, survival and body composition of 40 day post hatch larval grouper, Epinephelus coioides. Fish were fed fish meal and protein hydrolysate based diets for 32 days with either 100% maize oil or 100% fish oil in triplicate from 40-day after hatching to slaughter size (fish weight: 0.32 g to 11 g). Final body wet weight (FBW: 11.8±0.7 and 11.1±0.1, respectively), weight gain (WG: 3556±251 and 3360±189, respectively), specific growth rate (SGR: 11.2±0.2 and 11.1±0.2, respectively) and survival rate (80±5 and 79±4, respectively) were not significantly affected by dietary lipid sources (P>0.05). The effect of different oil sources on the composition of tissues was significant only for dorsal muscle lipid. In dorsal muscle, lipid content was significantly higher in fish oil group. The fatty acids composition of the muscle lipids well reflected the fatty acids composition of the experimental diets. The growth performance showed that a balance is required between growth-promoting essential fatty acids (EFA) qualities of dietary n-3 highly unsaturated fatty acid (n-3 HUFA) and their potentially growth-inhibiting (pro-oxidant) qualities. Results indicated when EFA of the diet are sufficient for the development of postlarvae, there is no difference whether use fish or maize oil in the formulated diets, 2.87% n-3 HUFA is sufficient for grouper postlarvae development and more n-3 HUFA are not necessarily beneficial to fish performance.
  Shi-Qiang Diao , Zhong Huang , Shui-Sheng Chen , Jin Niu , Zhuo-Jia Li , Xian Ding and Hei-Zhao Lin
  Problem statement: The utilization of inositol was detected for growth performance and erum biochemical parameters of juvenile barramundi (Lates calcarifer). Approach: A 56 day feeding trial was conducted to evaluate the effect of inositol on growth, feed utilization and serum biochemical parameters for juvenile barramundi Lates calcarifer (initial size 5.51±0.07g). Six experimental fish meal-based isonitrogenous (42% crude protein) and isolipidic (10% crude lipid) diets containing levels of inositol (350, 364, 458, 507, 720, 1050 mg kg-1 diet) were formulated. Results: Fish fed diet containing inositol 507 mg kg-1 diet had the significantly highest weight gain (WG, %) among all the groups (p<0.05) and had significantly lower Feed Conversion Ratio (FCR) than fish fed the diet containing inositol 458 mg kg-1 diet (p<0.05). Survival and Hepatosomatic Index (HSI) were not significantly affected by graded levels of dietary inositol (p>0.05). However, significantly lower Viscerasomatic Index (VSI) was found in fish fed diet without supplemental inositol (p<0.05). Dietary inositol levels did not affect whole body moisture, crude protein and lipid contents (p>0.05). Total protein and triacylglycerol in serum increased with increasing dietary inositol levels up to 507 mg kg-1 diet (p<0.05). The significantly lowest blood urea nitrogen was found in fish fed dietary inositol 458 mg kg-1 diet among all groups except for 720 mg kg-1 diet. Total Cholesterol (TC) of fish fed dietary inositol 507-1050 mg kg-1 diet was higher than those of fish fed dietary inositol 350-458 mg kg-1 diet. Conclusion: Results of the present investigation demonstrated significant improvement of growth and feed utilization of juvenile barramundi can be achieved by inositol supplementation at 507 mg kg-1 diet.
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