DefinePK

Abstract

The marine pollution problem in the offshore is becoming more serious due to the expansion of the marine ranching business and the increase in the artificial feed consumption. In order to solve this problem, it is essential to develop eco-friendly culture approaches that can run marine ranching systems without artificial feeds. In this study, we investigated the possibility of growing the fishes without artificial feeds by luring phototactic fishes into the farm using LED (light emitting device) illumination in water. Specifically, we examined the luring capability of underwater LED light for young filefishes to the desired place and analyzed the luring time depending on the wavelength and intensity of underwater LED, night and day, etc. As a result, it was observed that young filefishes responded sensitively to blue LEDs rather than white LEDs and the luring time was independent on the intensity of underwater LEDs in this experimental scale. In addition, while LED light attracted young filefishes into LED area at day time, the filefishes were distant from the underwater LEDs at night time. In conclusion, we expect that underwater LEDs can attract phototactic fishes into the marine ranches and farm, resulting in the fishes to be fed without artificial feeds.