The Effect of Fermented Organic Feed on The Performance of Oithona sp in Semi Mass Culture
This research was aimed to know the effect of different fermented organic feed on the growth performance of Oithona sp. in semi mass culture condition. The Oithona sp. cultures were fed with mixed organic fermentation of pulp, bran and fish meal by using probiotic microbes and phytoplankton cells. There were 4 treatments and 4 replicates in this study. Treatment A was the Oithona sp. cultured with addition of Chaetoceros calcitrans cells (2x10 6 cells mL 1 without fermented organic feed (0 g L 1 of medium culture) While B, C, and D with addition of C. calcitrans cells and 0.5, 1.0, and 1.5 g L 1 of fermented organic feed, respectively. The results showed that the dosage of fermented organic feed had significantly different effect (P 0.05) on the growth performance of Oithona sp. culture. The best growth performance of Oithona sp. shown at the addition of 0.5 g L 1 of fermented organic feed, with total density of 7.09 0.11 ind mL 1 population growth rate of 0.116 0.002 ind d 1 and eggs production of 7.88 0.93 eggs ind 1 of adult.