Production performance of Anguilla bicolor bicolor with the addition of CaCO3 into culture media

This study aimed to determine effect of calcium carbonate (CaCO3) addition in to the culture media for the production performance (survival rate, biomass growth rate, food conversion ratio, and coefficient of diversity) of Indonesian eel Anguilla bicolor bicolor. The experimental designed CRD with four treatments (calcium carbonate addition with dose A=0 mg/L; B=50 mg/L; C=100 mg/L; and D=150 mg/L) and three replications. The eel with body weight average of 10.3±0.16 g/individual cultured in aquariums (100×50×40 cm3) with 4 g/L of stocking densities. This study was conducted for 60 days, in which the eel were fed three times a day by at satiation method. The result of this study showed that treatment B with calcium carbonate addition of 50 mg/L in to the culture media was the best treatment for production performance (survival rate 99.1%; biomass growth rate 3.48 g/day; and food conversion ratio 3.5). It was also optimal to reduce the physiological responses of the eel, in which the oxygen consumption rate ie 0.36 mg O2/g/jam and osmotic work rate ie 0.22 mOsm/L H2O. For the coefficient of diversity, the best results occur in treatment D i.e. 23.3%. Water quality during the study are within the range of optimal maintenance of eels (temperature 29.8–31.73 oC; pH 7.4–8.1; dissolved oxygen 4.7–5.57 mg/L; nitrite 0.10–0.78 mg/L; and ammonia 0.0008–0.0281 mg/L).