Impacts of dietary zinc on growth performance, haematological indicators, transaminase activity and tissue trace mineral contents of soft-shelled turtle (Pelodiscus sinensis)
文献类型： 外文期刊
作者： Kou, Hongyan 1 ; Hu, Junru 2 ; Wang, An-Li 3 ; Pan, Xunbin 3 ; Miao, Yutao 3 ; Lin, Li 1 ;
作者机构： 1.Zhongkai Univ Agr & Engn, Coll Anim Sci & Technol, Guangdong Prov Key Lab Waterfowl Hlth Breeding, Guangzhou Key Lab Aquat Anim Dis & Waterfowl Bree, Guangzhou 510225, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Inst Anim Sci, Guangdong Key Lab Anim Breeding & Nutr, Key Lab Anim Nutr & Feed Sci South China,Minist A, Guangzhou, Peoples R China
3.South China Normal Univ, Coll Life Sci, Key Lab Ecol & Environm Sci Guangdong Higher Educ, Guangdong Prov Key Lab Hlth & Safe Aquaculture, Guangzhou 510631, Peoples R China
4.South China Normal Univ, Inst Modern Aquaculture Sci & Engn, Guangzhou, Peoples R China
关键词： growth performance; haematological parameters; soft-shelled turtle; trace mineral contents; transaminase activity; zinc
期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）
ISSN： 1353-5773
年卷期： 2021 年 27 卷 6 期
页码：
收录情况： SCI
摘要： A 12-week growth trial was conducted to investigate the impacts of dietary zinc on growth performance, whole-body composition, haematological parameters, liver aspartate aminotransferase and alanine transaminase activity and tissue trace mineral contents of soft-shelled turtle (Pelodiscus sinensis). Approximately 4 g of turtles were fed fishmeal-based diets with 35.43, 46.23, 55.38, 66.74, 75.06 and 85.24 mg Zn/kg. Respiratory burst, red blood cells and intestine somatic index enhanced with escalating dietary Zn concentrations up to 55.38 mg/kg and then kept constant beyond this level. Escalating dietary Zn inclusion up to 66.74 mg/kg improved weight gain, survival rate, feed intake, albumin, haemoglobin, liver aspartate aminotransferase and alanine transaminase activity, carapace ratio and crude protein of turtles, beyond which they decreased. Osmolality, hepatosomatic index and crude lipid of turtles firstly declined with elevating dietary zinc levels from 35.43 to 55.38 mg/kg diet and then increased at a higher zinc level. Liver and muscle Zn concentrations enhanced with escalating dietary zinc inclusion, whereas Cu and Fe concentrations reduced. In summary, the optimal dietary zinc requirements for turtles were 61.27, 60.46 and 60.03 mg/kg diet, based on quadratic regression analysis derived from weight gain, aspartate aminotransferase and alanine transaminase activity, respectively.
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