Summary
The study evaluated the effects of LED colors on CPUE, catch and bycatch rates, and carapace widths in the swimming fisheries in Malaysia, Thailand, and Taiwan. Waterproof flashing LED bulbs (36-48 h of continuous operation with a flash every 2 seconds) were secured to the top of traps using hooks to prevent them from sinking.
Blue light showed a positive effect on CPUE, while green and red lights had negative impacts, however none of these trends were significant, and sampling location had a greater impact on CPUE than light treatments. Bycatch levels also varied by light treatment - blue and green lights had the highest levels of bycatch, and the control group had the lowest, with no statistical differences.