High growth rates of Asian seabass ( <i>Lates calcarifer</i> Bloch, 1790) fry reared using a demand feeder with an image processing system for detecting fish behaviour

The feeding behaviour and growth rates of Asian seabass (Lates calcarifer Bloch, 1790) fry were studied using a new type demand (NTD) feeder. This system was equipped with programme to detect hunger in fish automatically dispense pellets. system could overcome hierarchy during feeding. Fish rearing experiments conducted compare the NTD feeder infrared light (ILD) automatic timer (AT) feeders. specific rate body weight (SGRBW) was significantly higher use than the ILD or AT total length (SGRTL) feed conversion ratios (FCR) showed no significant differences among three types feeders. Fish conducted, frequencies were compared. average frequency amount per day by the NTD those ILD In feeder, seabass ate small amounts pellets high frequencies at each time. Therefore, be one reasons for growth rates fed