广东省农业科学院机构知识库

Inclusion of Chlorella water extract in Oreochromis niloticus fingerling diets: Effects on growth performance, body composition, digestive enzyme activity, antioxidant and immune capacity, intestine and hepatic histomorphology and sodium nitrite stress resistance

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文献类型：外文期刊

作者： Peng, Kai ¹ ; Chen, Xiaoying ¹ ; Wei, Dong ² ; Zhao, Lirong ¹ ; Chen, Bing ¹ ; Mo, Wenyan ¹ ; Zheng, Chuntian ¹ ; Sun, Yu ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Key Lab Anim Nutr & Feed Sci South China, Guangdong Key Lab Anim Breeding & Nutr, Minist Agr Rural Affairs,Inst Anim Sci, Guangzhou 510640, Peoples R China

2.South China Univ Technol, Sch Food Sci & Engn, Guangzhou 510640, Peoples R China

关键词： Chlorella water extract; Oreochromis niloticus; Growth performance; Nitrite stress

期刊名称：AQUACULTURE REPORTS （影响因子：3.216；五年影响因子：3.812 ）

ISSN： 2352-5134

年卷期： 2020 年 18 卷

页码：

收录情况： SCI

摘要： Chlorella meal as feed ingredient in diets has been well evaluated in fish and shellfish, whereas limited information is available about Chlorella extract as feed supplement and their effects on growth performance and stress resistance of fish. This study was conducted to assess effect of Chlorella water extract (CWE) on growth performance, body composition, digestive enzyme activity, antioxidant and immune capacity, histomorphology, and sodium nitrite stress resistance of Oreochromis niloticus. In total of 1920 O. niloticus fingerlings with initial body weight of 0.9 +/- 0.01 g were randomly distributed into six groups with four replicates (80 fish per replicate) and fed six diets containing 0 (C0), 2.7 (C2.7), 5.5 (C5.5), 11 (C11), 22 (C22), and 33 (C33) ml/kg dry matter of CWE for 56 d. Fish were suffered with a 24-h sodium nitrite stress test at the end of feeding trial. Results indicated that dietary CWE did not affect growth performance, body composition and histological appearance of fish, but quadratically increased (P < 0.05) protein efficiency ratio and trypsin activity as dietary CWE increasing. Inclusion of CWE in diets increased (P < 0.05) hepatic glutathione peroxidase and lysozyme activities. Fish fed CWE-containing diets had lower (P < 0.05) cumulative mortality rate but higher (P < 0.05) acid phosphatase and lysozyme activities as observed in the sodium nitrite stress test. In conclusion, dietary CWE did not affect growth performance, body composition and histological appearance, but improved protein utilization, trypsin activity, antioxidant and immune capacity, and sodium nitrite stress resistance of O. niloticus.

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