Detection Range and Horizontal Accuracy of a Fine-Scale Positioning Telemetry System at Kaeng Krachan Reservoir, Thailand

Abstract

We examined the detection range and the accuracy of fine-scale positioning using Vemco Positioning System (VPS) for understanding the habitat use of Mekong giant catfish at Kaeng Krachan reservoir, Thailand. The appropriate distance between receivers and sound pressure of transmitters for the VPS was determined from the detection range test. We deployed 24 receivers at 500 m distance for the VPS positioning. The positioning accuracy was estimated using the stationary transmitters at fixed locations in the VPS array. The positions of the stationary transmitters were measured accurately (< 15 m). These results suggest that the VPS positioning can be useful for investigating fine-scale habitat use of Mekong giant catfish.