The effects of exogenous dietary enzyme on the growth of giant gourami (Osphronemus goramy)

Abstract

Abstract The commercial complex enzymes containing protease, lipase, and amylase are potentially used for exogenous dietary enzymes on giant gourami (Osphronemus goramy) as growth booster indirectly. The aims of this study are to know the effect of the exogenous dietary enzymes on giant gourami growth and to obtain the optimal dose of this enzyme. The research was conducted on January-April 2019 in the aquaculture facility and laboratory of Universitas Airlangga, Banyuwangi Campus. A total of 200 giant gourami juveniles (5.5 ± 0.5 cm in total length) were obtained from the fish hatchery centre of Kabat, Banyuwangi, Indonesia. All fish was divided into 20 glass aquaria (40 x 30 x 30 cm3) and reared for 40 days with exogenous dietary enzyme treatments in the diets following: control (no enzyme), 2.5 ml/100 g feed, 5.0 ml/100 g feed, 7.5 ml/100 g feed, 10.0 ml/100 g feed (4 replication in each treatment). The parameters were observed in this study are daily growth rate (DGR), specific growth rate (SGR), and feed conversion ratio (FCR). The exogenous dietary enzyme significantly (P < 0.05) effect to all parameters, the best result was showed in 10.0 ml/100 g feed treatment as optimum applicate dose.