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Journal of Fish Biology (2000) 57, 197209 doi:10.1006/jfbi.2000.1299, available online at http://www.idealibrary.com on
 

Summary: Journal of Fish Biology (2000) 57, 197­209
doi:10.1006/jfbi.2000.1299, available online at http://www.idealibrary.com on
Non-invasive recording of heart rate and ventilation rate in
rainbow trout during rest and swimming. Fish go wireless!
J. ALTIMIRAS* AND E. LARSEN
Department of Zoophysiology, Institute of Biological Sciences, University of Aarhus,
DK-8000 Aarhus C, Denmark
(Received 22 November 1999, Accepted 17 March 2000)
Resting heart rates and ventilation rates in rainbow trout Oncorhynchus mykiss at 15 C are
31·8 1·8 beat min 1
and 53·1 3·7 breaths min 1
, respectively. The non-invasive recording
system picked up the bioelectric potentials generated by the fish in the water and was based on
an array of six silver-silver chloride electrodes covered with agar-gel, which provided a better
signal-to-noise ratio than in previously described systems, and allowed the determination of
heart rate and ventilation rates at different swimming speeds up to 2 l s 1
. In concert with the
lower rates, the scope for changes in heart rate and ventilation rate during swimming was also
considerably larger than in earlier studies (2·4- and 2·0-fold, respectively). Two main
conclusions result from this work: (i) short recovery times under 48 h after anaesthesia and

  

Source: Altimiras, Jordi - Department of Biology, Linköpings Universitet

 

Collections: Environmental Sciences and Ecology