Mukai, Yukinori and Taha, Zahari and Ismail, Khairul Muttaqin and Nai, Han Tan and Mohd Razman, Mohd Azraai and Mat Jizat, Jessnor Arif
(2021)
High growth rates of Asian seabass (Lates calcarifer Bloch,
1790) fry reared using a demand feeder with an image
processing system for detecting fish behaviour.
Aquaculture Research, 52 (10).
pp. 5093-5098.
ISSN 1355557X
Abstract
The feeding behaviour and growth rates of Asian seabass (Lates calcarifer Bloch,
1790) fry were studied using a new type demand (NTD) feeder. This feeding system
was equipped with a programme to detect hunger behaviour in fish and automatically
dispense pellets. This system could overcome hierarchy in fish during feeding.
Fish rearing experiments were conducted to compare the NTD feeder with infrared
light demand (ILD) and automatic timer (AT) feeders. The specific growth rate of body
weight (SGRBW) was significantly higher with the use of the NTD feeder than with the
ILD or AT feeders. The specific growth rate of total length (SGRTL) and feed conversion
ratios (FCR) showed no significant differences among the three types of feeders.
Fish feeding behaviour experiments were conducted, and the feeding frequencies
were compared. The average feeding frequency and feeding amount per day by the
NTD feeder were significantly higher than those by the ILD feeder. In the NTD feeder,
seabass ate small amounts of pellets with high frequencies at each feeding time.
Therefore, high frequency feeding could be one of the reasons for the high growth
rates of fish fed using the NTD feeder.
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