Effectiveness of LED light spectrum exposure on growth performance and color quality of juvenile polka dot grouper (Cromileptes altivelis)

• Published in: IOP conference series. Earth and environmental science 2022-06, Vol.1033 (1), p.12007
• Main Authors: Nirmala, K, Hastuti, Y P, Ghukos, T P
• Format: Article
• Language: English
• Subjects: Captivity; Color; Cromileptes altivelis; Exposure; Growth rate; Light emitting diodes; Ornamental fish; Performance evaluation; Physical growth; Recirculating systems; Saline water; Wavelengths
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1033/1/012007

Polka dot grouper ( Cromileptes altivelis ) is a saltwater ornamental fish that has a characteristic of black spots on the surface of its body. Polka dot grouper has a slow growth rate and color quality that fade in captivity. The purpose of this study was to evaluate the growth performance and color quality of polka dot grouper under exposure to different light-emitting diode (LED) spectrums in a recirculating system. Polka dot grouper was maintained in a 50×40×40 cm 3 aquarium with a recirculating system for 30 days. This study used a randomized block design with five treatments and three groups. The treatments consisted of control (room light) and four types of the LED light spectrum with different wavelengths, i.e., red, green, blue, and white. The results showed that the best values for growth performance, physiological response, and color quality were found in the treatment of red LED light. Using a red LED light spectrum exposure in a recirculating system can improve the growth performance and color quality of the polka dot grouper.