Abstract
The availability of copepodOithona similisas live food organism for shrimp and marine fish larvae is strongly influenced by the optimum feed and environment conditions. Optimization of dissolved oxygen (DO) forO. similiscan be carried out by providing proper aeration in culture media. Feeding with fermented organic diet besides phytoplankton is expected to support the individual growth, metabolism, and reproduction ofO. similis.The aim of this study was to examine the effect of different aeration flow rates on the growth performance and egg production ofO. similisand to determine the optimum aeration flow rate. Completely Randomized Design Experiment used in this study with 4 treatments and 4 replications. The treatment wasO. similisculture with different aeration flow rate of 0.00; 22.00; 45.67; 66.67 mL.second-1. The results showed that the difference aeration flow rate significantly affected (p <0.05) the growth performance and egg production ofO. similis. The aeration flow rate of 45.67 mL.second-1provided the best growth performance with total density of 81.25 ± 2.99 ind.mL-1; population specific growth rate 0.220 ± 0.002 day-1; and egg production28.40 ± 0.48 eggs.ind-1. Moreover, the optimum aeration flow rate culture medium forO. similisis 45.70 mL.second-1.
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