Fuad, Bagus Prasetyo Aji, Wahyu Isroni, Mochammad Riyanto, Noorhidayah Binti Mamat, Anjas Sasana Bahri
This study quantified and compared the effects of underwater LED light color and intensity on fish behavior and shoal distribution during fixed lift-net operations. Four LED colors (blue, green, yellow, and white) and a kerosene Petromax lamp as a control were tested in 25 fishing trials in the coastal waters of Pasuruan, Indonesia. Fish aggregation and vertical distribution were recorded using an echosounder and analyzed based on light intensity gradients. Analysis of variance (ANOVA) revealed significant differences among light colors (F4,20 = 6.24, p < 0.05), with green LEDs producing the highest shoal proportion (75.7 ± 6.3%) and catch weight (28.52 ± 2.41 kg/trip). The relationship between light intensity and shoal proportion followed a logarithmic pattern (R2 = 0.86), peaking at 1×10-8-1×10-7 W/cm2. Moderate green illumination provided stable aggregation within 90 minutes and sustained >90% of maximum density. These results demonstrate that optimized green LED lighting enhances fish aggregation efficiency and catch performance, offering a practical and energy-efficient alternative to conventional kerosene lamps for sustainable light-based fisheries. This study provides quantitative evidence on the optimal spectral and intensity range for efficient and ecofriendly light-based fishing operations, contributing to the advancement of sustainable fishing technology. ©2025 The authors.
Department of Fisheries Resources Utilization and Marine, Universitas Brawijaya, Malang, 65145, Indonesia; Coastal and Marine Research Center, Brawijaya University, Malang, 65145, Indonesia; Department of Fisheries Resources Utilization, IPB University, Bogor, 16680, Indonesia; Institute of Biological Science, University of Malaya, Kuala Lumpur, 50603, Malaysia; Malang Fisheries Science College / STIP, Malang, 65141, Indonesia
