Citation. Kuechle, V. B.; Reichle, R. A.; Zinnel, K. E.; Ross, M. J. 1979. Use of a microprocessor to locate fish in experimental channels. Second International Conference of Wildlife Biotelemetry 2:33-39. Laramie, Wyoming.   [1362  CC]

Abstract. An RCA 1802 microprocessor is used to locate fish in a 400 m outdoor experimental channel at the U.S. EPA Monticello Ecological Research Station. The system consists of horizontally polarized antennas spaced at 30 m intervals. The antennas are sequentially switched into a receiver and the signal strength at each antenna is measured. The microprocessor controls all timing, switching and measurement functions. Each fish in this system is tagged with an rf tag which has a unique frequency in the 53 MHz band. Selecting a particular fish for tracking is equivalent to changing the frequency tuned on the receiver. A microprocessor determines the antenna sending the maximum signal level and prints out this data along with fish number and time of day. A signal to noise margin is calculated by comparing the average signal level to the signal level from the antenna closest to the fish.

Keywords. microprocessor, telemetry, fish