Lena Serghides, William Soukoreff, and Richard Playle. (1996) Remote, Non-Invasive Recording of Heart and Ventilation Rates in Rainbow Trout using an Impedance Converter and Fourier Analysis. Abstract in Canadian Society of Zoologists Bulletin 27(2), pp 94.

Remote, Non-Invasive Recording of Heart and Ventilation Rates in Rainbow Trout using an Impedance Converter and Fourier Analysis

Lena Serghides 1, William Soukoreff 2, and Richard Playle 1

1 Wilfrid Laurier University
Department of Biology
Waterloo, Ontario, N2L 3C5
2 University of Guelph
Department of Computing
and Information Science
Guelph, Ontario, N1G 2W1
Abstract
We have been able to record heart and ventilation rates in resting rainbow trout (Oncorhynchus mykiss) using electrodes placed on either side of the fish but not touching the fish. No surgery is required. The electrodes are connected to an impedance converter, which picks up weak electrical signals generated by the fish, including the fish's heart and ventilatory muscles. These electrical signals are amplified and recorded 20 times per second on computer disk. Recorded signals are later analysed using a Fourier mathematical function to separate heart and ventilation rates from electrical "noise" generated by irregular movements of the fish.

Abstract presented at
The 35th Annual Meeting of the Canadian Society of Zoologists,
Memorial University, St. John's, Newfoundland, Canada,
May 7th to 11th 1996.