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Assessment of rapeseed meal as fish meal alternative in diets for juvenile Asian red-tailed catfish (Hemibagrus wyckioides)
Aquaculture Reports ( IF 3.7 ) Pub Date : 2020-10-15 , DOI: 10.1016/j.aqrep.2020.100497
Xindang Zhang , Hengzhi Wang , Jianwei Zhang , Beibei Lin , Lusi Chen , Qiumei Wang , Guangbin Li , Junming Deng

This study investigated the effects of rapeseed meal (RM) as fish meal (FM) alternative on the growth rate, feed utilization, protein metabolism-related parameters, and antioxidant indices of Asian red-tailed catfish (Hemibagrus wyckioides). Five isoproteic and isocaloric diets were formulated with 0%, 11.2 %, 22.4 %, 33.6 %, and 44.8 % RM replacing graded levels of FM, respectively. Each experimental diet was randomly offered to juvenile catfish (initial average weight 3.24 g) in triplicate tanks for 8 weeks. The substitution of FM by RM linearly depressed the growth rate and feed utilization of fish, whereas no significant influences were observed among fish fed diets containing 0%, 11.2 %, and 22.4 % RM. Similarly, the substitution of FM by RM also linearly reduced the gastrointestinal digestive enzymes (pepsin, trypsin, lipase, and amylase) activities, but raised the plasma aspartate aminotransferase and hepatic γ-glutamyl transferase activities. The relative repression levels of mammalian target of rapamycin and insulin-like growth factor 1 in liver, adenosine monophosphate deaminase 1 and glutamate dehydrogenase genes in liver and muscle were higher in fish fed diets with 0% and 11.2 % RM compared with those fed the other diets. Further, dietary 11.2 % RM inclusion did not negatively affect the plasma IgM and malondialdehyde contents, and hepatic superoxide dismutase, catalase, peroxidase, and glutathione peroxidase activities. These results indicate that a maximum of 11.2 % RM in diets can be included without negative impacts on the growth and health of H. wyckioides; the detrimental effect of higher inclusion levels of RM may be attributed to the existence of antinutritional factors (mainly glucosinolates) present in RM.



中文翻译:

评估油菜籽粉作为亚洲红尾Asian鱼(Hemibagrus wyckioides)日粮中鱼粉替代品的方法

这项研究调查了菜籽粉(RM)作为鱼粉(FM)的替代品对亚洲红尾cat鱼(Hemibagrus wyckioides)的生长速率,饲料利用率,蛋白质代谢相关参数和抗氧化指数的影响)。配制了五种等蛋白和等热量饮食,分别用0%,11.2%,22.4%,33.6%和44.8%的RM代替了分级FM。将每种实验饮食随机喂入一式三份的水族箱中的cat鱼(初始平均体重3.24 g),持续8周。用RM替代FM线性降低了鱼的生长速度和饲料利用率,而在以0%,11.2%和22.4%RM饲喂鱼的日粮中未观察到显着影响。同样,用RM替代FM也会线性降低胃肠道消化酶(胃蛋白酶,胰蛋白酶,脂肪酶和淀粉酶)的活性,但会提高血浆天冬氨酸转氨酶和肝γ-谷氨酰转移酶的活性。雷帕霉素和胰岛素样生长因子1在肝脏中对哺乳动物靶标的相对抑制水平,饲喂0%和11.2%RM的鱼饲料中,肝脏和肌肉中的腺苷一磷酸脱氨酶1和谷氨酸脱氢酶基因高于其他饲料。此外,饮食中11.2%RM的夹杂物不会对血浆IgM和丙二醛含量以及肝超氧化物歧化酶,过氧化氢酶,过氧化物酶和谷胱甘肽过氧化物酶活性产生负面影响。这些结果表明,饮食中最多可包含RM 11.2%的RM,而不会影响其生长和健康 和谷胱甘肽过氧化物酶活性。这些结果表明,饮食中最多可以包含RM 11.2%的RM,而不会影响其生长和健康 和谷胱甘肽过氧化物酶活性。这些结果表明,饮食中最多可以包含RM 11.2%的RM,而不会影响其生长和健康H. wyckioides ; RM含量较高的不利影响可能归因于RM中存在抗营养因子(主要是芥子油苷)。

更新日期:2020-10-16
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