Abstract:
A total of 13 circle-shaped traps were constructed with the same dimensions and materials. Six continuous light traps, six blinking light traps and a control (trap without lamp), and simultaneously tested in the concrete pond at the beginning of trials. The trap made of Polyamide (PA) nylon monofilament (31.75 mm mesh size), was fastened around two wire ring frames (wire dia. 2 mm); 1540 mm perimeter, was placed on the top and bottom (490 mm diameter). The net height was 270 mm with a hanging ratio of 0.45. Each trap had four entry holes located on each side of the trap with about 5 cm opening mesh. A sheet of Polyethylene (PE) nylon multifilament was placed on the top, allowing for catch removal, and another was placed on the bottom where the lamp was attached.
Each of the light traps was assigned with 0.9 W LED (Light Emitting Diode) Torpedo light
(215 x 50 mm, Fishing Net Industry Co. Ltd. China) containing blue (8.4 ± 1.65 lx), orange
(42.5 ± 2.68 lx), yellow (332.0 ± 37.14 lx), red (376.4 ± 93.40 lx), white (1282.6 ± 91.35 lx),
and green (3116 ± 342.74 lx), powered by 3 V dry-cell batteries, respectively. The intensity of each lamp was measured using a light-meter LX-100 (Lutron, Taiwan) at Basic Laboratory of Faculty of Mathematic and Natural Science, Lambung Mangkurat University.
The experimental data were presented in the form of tabulation.
