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Recent studies on the role of carotenoids in aquaculture have investigated their function in regulating pigmentation, growth, survival, and immune activity of aquatic animals. These carotenoids include astaxanthin, canthaxanthin, lutein, zeaxanthin, and tunaxanthin. Astaxanthin and canthaxanthin are the main synthetic carotenoids used world-wide in the aquaculture industry. They play an important role in protecting cells and organisms against photosensitized oxidations. Direct evidence of carotenoids functioning as antioxidants in vivo has been reported in animal models. In addition to their established biological effects as antioxidants, carotenoids appear to have a great variety of cellular actions that make them remarkable physiological modulators. Consequently, recent attention has been focused on improving our understanding of carotenoids on the physiology and metabolism in aquatic animals with a view to enhance the efficacy of astaxanthin as a carotenoid pigment. This review aims to summarize the function and research progress of carotenoids in aquaculture. We discuss the methods used to study the absorption, transport, metabolic transformation and deposition of carotenoids, and their spatial and temporal expression. 相似文献
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(一)改善肉鸡肌肤颜色受传统消费习惯的影响,肉鸡皮肤、脚胫的黄度已被列为其是否为天然产品的评判标准。目前市场销售的肉鸡,由于缺乏天然色素沉积,使得皮肤及脚胫着色浅淡,呈青灰、淡白色,显然不具备要求。虽然不同品种肉鸡皮肤着色性能不同,但沉积在肉鸡皮下脂肪上的黄色物质都相同,即叶黄素(又称含氧类胡萝卜素)。叶黄素是类天然色素的总称。常见的叶黄素有黄体素、玉米黄质、玉米次黄质、紫黄质、新黄质、隐黄质等。其中仅黄体素和玉米黄质具有着色作用。它们通常存在于玉米、玉米蛋白粉、苜蓿、万寿菊中。包括肉鸡在内的绝大多 相似文献
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玉米营养很突出玉米,特别是深黄色的嫩玉米,含有较多黄金玉米粒巧吃营养足的营养保健物质。每百克玉米中含叶酸12微克,是大米的3倍;钾为238毫克 ̄300毫克,是大米的2倍~3倍;镁为96 相似文献
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本试验旨在研究日粮中分别添加常规叶黄素和高玉米黄质叶黄素对高温条件下(33±0.52)℃黄羽肉鸡生长性能及着色效果的影响。选取60日龄、初始体重(1209±72)g、健康状况良好的雌性黄羽肉鸡144只,随机分为3个处理,每个处理6个重复(笼),每个重复8只鸡。对照组饲喂基础日粮,试验组在基础日粮中分别添加2 g/kg的常规或高玉米黄质叶黄素。预试期7 d,正试期28 d。结果表明:与对照组相比,常规组肉鸡末重和平均日增重显著提高,常规组和高玉米黄质组成活率显著提高;饲喂24 d后,高玉米黄质组黄羽肉鸡翅下皮肤的亮度(L*)值与黄度(b*)值显著高于其他2组;饲喂28 d后,常规组和高玉米黄质组跗跖b*值显著提高,高玉米黄质组喙的b*值显著高于其他2组,常规组胸肌b*值显著提高;常规和高玉米黄质组胸肌总抗氧化能力、谷胱甘肽过氧化酶活性显著提高,丙二醛含量显著降低。综上所述,饲料中添加常规和高玉米黄质叶黄素对高温条件下黄羽肉鸡生长性能和着色效果均有促进作用,其中高玉米黄质叶黄素效果更佳。 相似文献