담수산 농축 Chlorella와 빵효모의 혼합 공급 비율에 따른 담수산 Rotifer, Brachionus calyciflorus Pallas의 대량배양

To reduce the production cost of the rotifer, different combinations of Chlorella and Baker's yeast were used to mass culture of Brachionus calyciflorus. Rotifer density tended to decrease abruptly at 100 % Chlorella-feeding, when unionized ammonia level ranged from 14.1 to 29.6 ppm and DO level from 0.2 to 0.3 ppm. Hence DO level > 0.3 ppm and unionized ammonia level < 14 ppm should be maintained. Production cost of the rotifer was the highest, when a combination of 100% Chlorella was chosen as food source, but it was about 1.8 times less, when a combination of 70 % Chlorella and 30 % yeast was used as food source. However, the highest rotifer density remained almost at the same level, when either of the combination was chosen as food source. A combination of 70 % Chlorella and 30 % yeast is recommended for maximum production of the rotifer at the lowest feed cost.