期刊
AQUACULTURE
卷 396, 期 -, 页码 14-19出版社
ELSEVIER
DOI: 10.1016/j.aquaculture.2013.02.009
关键词
Spirulina platensis; Pigmentation; Growth performance; Rainbow trout
This study evaluated the effects of diets containing 0, 2.5, 5, 7.5 and 10% Spirulina platensis, and 50 mg of synthetic astaxanthin kg(-1) on skin and fillet pigmentation, and growth performance of rainbow trout (Oncorhynchus mykiss). A completely randomized experimental design was developed with six treatments and three replicates. Two hundred and sixteen rainbow trout with average initial weight of 101 +/- 8 g were assigned to eighteen experimental tanks. The experiment lasted for ten weeks. Rainbow trout fed 5% S. platensis showed a significant lower growth performance than those fed 7.5 and 10% S. platensis (p < 0.05). However, carotenoid concentrations of skin and fillet significantly increased with increasing the levels of the alga (p < 0.05). Inclusion of 10% S. platensis as a natural pigment source resulted in the highest carotenoid deposition in both tissues. The highest values of a* (redness) and b* (yellowness) were observed in fish fillet fed 10% S. platensis. In the skin, however, the highest value was found for fish fed synthetic astaxanthin. In addition, feeding on control diet significantly increased L* (luminosity), C* (chroma), and H degrees (hue) in both skin and fillet compared to feeding with other diets. The present results demonstrate that S. platensis can be introduced as an alternative natural carotenoid source instead of synthetic astaxanthin in rainbow trout diets. Inclusion of 7.5% S. platensis was found to be a suitable dietary level to ensure pigmentation as well as no negative effects on fish growth. (c) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据