This research aimed to evaluate the effects of aquaculture systems and types of feed on the digestive system and the growth performance of Giant gourami Osphronemus goramy juveniles. This research used two experimental factors (2 × 3), that is culture systems (biofloc and control systems) and feed types (artificial feed, Tubifex worm and a combination of both feed). The experiment comprised of six treatments in triplicates, that is artificial feed in biofloc system (BP), Tubifex worm in biofloc (BW), combined feed in biofloc system (BCo), artificial feed in control system (CP), Tubifex worm in control system (CW) and combined feed in control system (CCo). Gourami juveniles with an average body weight of 0.03 ± 0.01 g were randomly distributed into 18 units of aquarium (18 L) at a density of 5 fish/L. Feeding was done to apparent satiety, four times a day. The fish in treatment BCo showed higher protease activity, villi length and surface area than those of other treatments (p < 0.05). Both the culture system and types of feed had significant effects (p < 0.05) on the growth performance of giant gourami juveniles. The fish survival was more affected by the types of feed rather than the culture systems, in which the treatment with artificial feed (P) had the lowest survival compared to the other treatments. In conclusion, nursery culture in biofloc system fed with a combination of artificial feed and Tubifex worm (BCo) could improve the digestive and growth performance of giant gourami juveniles.

中文翻译：

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用不同饲料类型喂养的生物絮团系统中巨型吻口鱼（Osphronemus goramy Lacepede）幼鱼的消化系统和生长性能

本研究旨在评估水产养殖系统和饲料类型对巨吻鲈幼鱼消化系统和生长性能的影响。本研究使用了两个实验因素 (2 × 3)，即培养系统（生物絮团和控制系统）和饲料类型（人工饲料、Tubifex蠕虫和两种饲料的组合）。实验包括一式三份的六个处理，即生物絮团系统中的人工饲料（BP）、生物絮团中的Tubifex蠕虫（BW）、生物絮团系统中的组合饲料（BCo）、控制系统中的人工饲料（CP）、Tubifex控制系统中的蜗杆 (CW) 和控制系统中的组合进料 (CCo)。将平均体重为 0.03±0.01 g 的 Gourami 幼鱼以 5 条鱼/L 的密度随机分配到 18 个单位的水族箱（18 L）中。每天喂食四次以达到明显的饱腹感。与其他处理相比，BCo 处理的鱼表现出更高的蛋白酶活性、绒毛长度和表面积（p  < 0.05）。养殖系统和饲料类型都有显着影响（p < 0.05) 对巨型吻口鱼幼鱼生长性能的影响。鱼类存活率受饲料类型而非养殖系统的影响更大，其中人工饲料 (P) 处理与其他处理相比存活率最低。总之，在生物絮团系统中饲喂人工饲料和Tubifex蠕虫 (BCo) 的育苗可以改善巨型吻口鱼幼鱼的消化和生长性能。