Efficacy and tolerance of lutein as colourant in diet of juvenile soft-shelled turtle Pelodiscus sinensis

文献类型： 外文期刊

第一作者： Liu, H. Y.

作者： Liu, H. Y.;Jia, P.;Yang, Z. C.;Xue, M.;Wang, J.;Wu, X. F.;Li, J. G.

作者机构：

关键词： ef?cacy;growth;lutein;pigmentation;softshelled turtle;tolerance

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）

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年卷期：

页码：

收录情况： SCI

摘要： The effects of dietary supplementation of lutein on the growth, haematological profile and pigmentation in target tissues of the soft-shelled turtles were investigated. Five experimental diets were prepared with lutein levels at 1.16 (D1, control), 70.3 (D2), 132 (D3) and 239 (D4) mgkg(-1), and one more high inclusion level of 3410mgkg(-1) (D5) was included for tolerance test. Each diet was fed to 24 juvenile turtles for 8w. Specific growth rate (SGR) in D2, D3 and D4 was significantly higher than that of group D1 and D5. Skin yellowness (b*) and chroma (C*) of both carapace and plastron skin were all significantly increased with higher dietary lutein levels. Dietary lutein supplementation turned the H degrees values of skins into yellowness. The accumulation of lutein in skin and muscle also augmented significantly with increasing lutein levels and fit a logarithmic correlation with dietary lutein levels. There were almost no differences in haematological parameters of all turtles. Lutein is an efficient and safe colourant in diet of soft-shelled turtle. The optimal inclusion levels for the highest SGR and desired skin colour in carapace and plastron of soft-shelled turtle were 162, 142 and 143mgkg(-1), respectively.

分类号： Q17

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