Rotifer, Brachionus plicatilis is very important in live food aquaculture, namely in early larvae feedings. The high nutritive value of rotifers provides a stable diet for culture species in the early life cycle. However, rotifer production is low and very unstable due to unsuitable culture systems and water quality. Feeding rotifers with unsuitable live feed may provide insufficient nutrients that are needed by the rotifers. The study aims to identify the optimum feeding frequencies to produce high rotifer production in an automated batch culture system.
The study used two feeding frequencies: non-continuous (NC) and continuous (C) feeding using Nannochloropsis oculata in a seven-day trial period to produce the highest amount of rotifer. An automated system was implemented to control the water parameters of the tank using various equipment that was integrated with Internet of Things (IoT) smart aquaculture concept ; an automated feeder pump, multiparameter sensors, and oxygen concentrator. Figure 1 shows C treatment produced the highest population, (297 rotifers/mL) whereas the lowest rotifer density was produced by NC treatment, (220 rotifers/mL) by the end of the 7-day trials. There is a significant difference (P<0.05) in rotifer density between the C and NC treatments .