A Lipid-walled microcapsule diet as co-feed for early feeding the Osphronemus gourami (Lacepede) larvae

ABSTRACT. The effects of microcapsule diet as co-feeding for early weaning phase of gourami larvae where evaluated in terms of ingestion rate of microcapsule, growth, and survival rate. The availability of tubifex worms as natural food is uncertain and can introduce pathogens to fish culture from outside environment. Therefore, the attempt to replace or substitute this natural food continues in order to reduce the level of dependence. This research used Complete Randomized Designed (CRD) with four treatments based on a different protocol feeding management. Gourami larvae should be started with the co-feeding on day 12 until day 17 and they are more receptive to microcapsule diets after day 17. The ingestion rate of microcapsule which consumed by the larvae during the period of rearing was 48.33, 68.33, and 88.33%. This study indicated that larvae started co-feeding day 22 showed highest of ingestion rate of the microcapsule, survival rate, specific growth rate and weight gain.

摘要：本研究以微胶囊饲料作为丝足鲈幼鱼早期断奶阶段的辅助投喂饲料，针对其微胶囊摄食率、生长性能及存活率展开效果评估。水蚯蚓（tubifex worms）作为天然饵料的供应稳定性欠佳，且可能从外界环境带入病原菌，对鱼类养殖造成威胁。因此，为降低对该类天然饵料的依赖程度，替代或替换方案的研发工作持续推进。本研究采用完全随机设计（Complete Randomized Design, CRD），设置四种不同投喂管理方案作为处理组。丝足鲈幼鱼的辅助投喂周期设定为第12日龄至第17日龄，且在第17日龄后，幼鱼对微胶囊饲料的接受度更高。养殖周期内幼鱼对微胶囊饲料的摄食率分别为48.33%、68.33%与88.33%。本研究结果显示，于第22日龄开始辅助投喂的实验组，其幼鱼的微胶囊饲料摄食率、存活率、特定生长率及体重增益均为各组最高。