The potential of the green tide macroalgae Chaetomorpha valida as a food source for Apostichopus japonicus was evaluated in this study as a solution to ease the shortage of macroalgae. Four diets were formulated and tested with juvenile A. japonicus in a laboratory simulation experiment for 6 weeks. Diets included commercial feed, Sargassum muticum, C. valida and C. valida fermentation feed. The crude protein content of the C. valida fermentation feed was similar to that of the commercial feed, and its crude fat was comparable to S. muticum. Though the energy intake of A. japonicus in the fermentation feed group was the lowest, it accounted for the highest proportion of energy for growth. The growth rate of animals fed with fermentation feed was lower than those fed commercial feed, similar to S. muticum feed, and consistent with the feed conversion efficiency for each diet. The contents of chemical oxygen demand (COD) and ammonia nitrogen of water in the fermentation feed group were the lowest. Its content of nitrite nitrogen of water also remained at a low level throughout. Overall, the fermented C. valida was a useful alternative food source of S. muticum for A. japonicus aquaculture.

中文翻译：

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绿潮巨藻 Chaetomorpha valida 作为刺参食物来源的潜力评价

本研究评估了绿潮巨藻Chaetomorpha valida作为刺参食物来源的潜力，作为缓解巨藻短缺的解决方案。用幼鱼A配制和测试了四种饮食。 japonicus在实验室模拟实验中进行了 6 周。饮食包括商业饲料、Sargassum muticum、C。 验证和C。 验证发酵饲料。C的粗蛋白含量。 valida发酵饲料与商品饲料相似，其粗脂肪与S相当. 变态。虽然A的能量摄入。 发酵饲料组日本刺参最低，占生长能量的比例最高。饲喂发酵饲料的动物的生长速度低于饲喂商业饲料的动物，与S . muticum饲料，并且与每种日粮的饲料转化率一致。发酵饲料组水的化学需氧量(COD)和氨氮含量最低。其水中亚硝酸盐含量也始终保持在较低水平。总的来说，发酵的C . valida是S的有用替代食物来源。 A的 muticum。日本水产养殖。