Receiving Distance of the Stationary Ultrasonic Biotelemetry Receiver in the Temperate Ocean

The investigation by the ultrasonic biotelemetry currently performed in Asia is shallow ocean space where water temperature is high. Furthermore, there is also much underwater noise, such as Pistol shrimp (Alpheus lobidens), in this ocean space. Therefore, differing from the receiving range that a maker recommends is assumed. Then, the maximum detection distance of VR2 was measured in the tank. From that result, the simulation that shows the detection range of this receiver quantitatively was performed. Moreover, the receiving range was measured in real ocean space, and change by oceanic condition was verified. Consequently, receiving distance brought a result shorter than a maker´s simulation. Also, the receiving distance was sharply changed by wind and weather.