Effects of replacing fish meal with corn gluten meal on growth, feed utilization, nitrogen and phosphorus excretion and IGF-I gene expression of juvenile Pseudobagrus ussuriensis
文献类型: 外文期刊
第一作者: Bu, Xianyong
作者: Bu, Xianyong;Ge, Xianping;Bu, Xianyong;Lian, Xuqiu;Zhang, Ying;Tang, Baibing;Yang, Yuhong;Chen, Fangyi
作者机构:
关键词: apparent digestibility coefficients;corn gluten meal;fish meal;growth;Pseudobagrus ussuriensis
期刊名称:AQUACULTURE RESEARCH ( 影响因子:2.082; 五年影响因子:2.415 )
ISSN: 1355-557X
年卷期: 2018 年 49 卷 2 期
页码:
收录情况: SCI
摘要: Seven isonitrogenous and isolipidic diets containing fish meal (FM) protein replaced by corn gluten meal (CGM) protein at 0% (the control, C0), 10% (C10), 20% (C20), 30% (C30), 40% (C40), 50% (C50) and 60% (C60) were fed to juvenile Pseudobagrus ussuriensis for 8-weeks to evaluate the effects of FM protein replaced by CGM protein on growth, feed utilization, nitrogen (N) and phosphorus (P) excretion and IGF-I gene expression of juvenile P.ussuriensis. The results showed that the replacement level up to 40% did not affect the weight gain, specific growth rate (SGR), feed intake and protein efficiency ratio, whereas these parameters were depressed by further replacement level. Apparent digestibility coefficients (ADC) of dry matter, crude protein significantly decreased, but ADC of phosphorus significantly increased with increasing dietary CGM levels (p < .05). Fish fed diets with FM protein replaced by CGM protein led to an increase in nitrogen excretion, but led to a reduction in phosphorus excretion. No significant differences were observed in alpha-amylase and lipase activities of intestine (p > .05). The lowest pepsin activity was found in C60 group. Fish fed diet C40, C50 and C60 had significantly lower serum lysozyme activity compared with fish fed diet C0 (p < .05). The lowest plasma alkaline phosphatase activity and the highest plasma alanine aminotransferase and aspartate aminotransferase activities were observed in C60 group. Fish fed diet C60 had significantly lower hepatic IGF-I gene expression compared with fish fed diet C10 (p < .05). Broken-line model analysis based on SGR against the CGM substitution level indicated that the appropriate replacement level was 37.7%.
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