【摘要】 进行了3个试验以考察饲料添加叶黄素对本地胡子鲶体色的影响。试验A比较了野生、半人工养殖、全人工养殖胡子鲶体色的差异,其皮肤叶黄素含量分别为8.01、4.64和1.61mg·kg-1鲜组织,肌肉叶黄素分别为2.06、1.83、0.96mg·kg-1鲜组织;试验B采用平均体重为52g的本地胡子鲶成鱼,在基础饲料中分别添加0、100、150、200mg·kg-1叶黄素,饲养6周后,成鱼皮肤叶黄素含量分别为1.07、5.88、7.02、7.81mg·kg-1鲜组织,肌肉叶黄素含量分别为0.64、1.35、1.81、1.86mg·kg-1鲜组织;试验C采用平均体重为3.2g的本地胡子鲶鱼种,在基础饲料中分别添加0、50、100、150mg·kg-1叶黄素,饲养6周后,鱼种皮肤叶黄素含量分别为3.2、8.73、11.49、12.51mg·kg-1鲜组织,肌肉叶黄素含量分别为0.87、1.71、1.97、2.03mg·kg-1鲜组织。上述结果表明,养殖与野生胡子鲶体色的差异主要来源于食物中叶黄素含量的不同,在饲料中添加叶黄素类产品可有效改善养殖胡子鲶体色,叶黄素适宜添加量建议为100mg·kg-1饲料(成鱼)或50mg·kg-1饲料(鱼种)。更多还原

【Abstract】 Three experiments were conducted to study the effect of adding xanthophyll on body color of Clarias fuscus. In experiment A, walking catfish were collected from natural river, common pond and concrete pond, representing wild, semicultured and cultured walking catfish. The xanthophyll content in skin and muscle of each group was 8.01, 4.64, 1.61 and 2.06, 1.83, 0.96 mg·kg-1 respectively. In experiment B, adult walking catfish, with an average weight of 52g, were divided into 4 groups and fed with artificial diet without (control) or with 100, 150, 200mg·kg-1 xanthophyll for 6 weeks. The xanthophyll content in skin and muscle of each group was 1.07, 5.88, 7.02, 7.81 and 0.64, 1.35, 1.81, 1.86 mg·kg-1 respectively. In experiment C, fingerling walking catfish,with an average weight of 3.2g, were divided into 4 groups and fed with artificial diet without (control) or with 50, 100, 150mg·kg-1 xanthophyll for 6 weeks. The xanthophyll content in skin and muscle of each group was 3.2,8.73,11.49,12.51 and 0.87,1.71,1.97,2.03 mg·kg-1 respectively. The results showed that the differences of body color between wild and cultured fishes come from the different xanthophyll content in diets, the addition of xanthophyll could improve body color of walking catfish and the feeding strategy for pigment was adding xanthophyll 100 mg·kg-1 in diet for adult walking catfish or xanthophyll 50 mg·kg-1 for fingerling.更多还原