In aquarium industry trade markets, Neocaridina davidi, the “red cherry” shrimp, is one of the most attractive ornamental shrimps due to the striking reddish coloration of females. Five commercial diets formulated for ornamental species were evaluated over a 90‐day period in N. davidi males and females, based on survival, biochemical composition, body weight, carotenoid content and body coloration. Furthermore, histological and histochemical analyses of the male reproductive system were performed to evaluate the spermatophore quality. In all treatments, survival was >80%, and protein content was similar in both female and male shrimps. Lipid content was higher in females and males fed on a diet having the highest lipid level. Carotenoid content was higher and body coloration was brighter in females and males fed on a diet containing the highest carotenoid level. Histological and histochemical analyses of the spermatophore structure and composition showed no differences among diets, suggesting that the five commercial diets are adequate for satisfactory growth and spermatophore quality of N. davidi. The diverse sources and quantities of carotenoids in the highest carotenoid level diet render it more suitable for colour enhancement of this species.

中文翻译：

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日粮对“红樱桃”虾新鳞螨（Caridea，Atyidae）中类胡萝卜素含量，体色，生化成分和精子质量的影响

在水族行业的贸易市场中，“红樱桃”虾Neocaridina davidi由于雌鱼的颜色呈红色，是最吸引人的观赏虾之一。制定了观赏树种五大商业饮食上在90天的时间进行评估N.腹鱼男性和女性，根据生存率，生化成分，体重，类胡萝卜素含量和身体颜色而定。此外，对男性生殖系统进行了组织学和组织化学分析，以评估精子细胞的质量。在所有处理中，雌性和雄性虾的存活率均> 80％，蛋白质含量相似。饮食中脂质含量最高的雌性和雄性的脂质含量较高。饲喂含有最高类胡萝卜素水平的饮食的雌性和雄性中类胡萝卜素含量较高，体色较亮。对精细胞结构和组成的组织学和组织化学分析显示，饮食之间没有差异，这表明五种商业饮食足以满足达维第猪笼草的令人满意的生长和精子质量。最高类胡萝卜素水平饮食中类胡萝卜素的来源和数量各异，使其更适合于该物种的增色。