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Fig. 6 | Animal Biotelemetry

Fig. 6

From: Validating Star-Oddi heart rate and acceleration data storage tags for use in Atlantic salmon (Salmo salar)

Fig. 6

Average heart rate (fH in bpm; a, b), percentage of ‘good’ ECGs (QI0; c, d) and external acceleration (EA in mg; e, f) values in free-swimming Atlantic salmon held for 6 weeks following surgical implantation of centi-HRT ACT or milli-HRT tags. Salmon were maintained at a constant temperature of 8 °C in the first trial (a, c, e; n = 5), whereas temperature varied between 8 and 12 °C in the second trial (b, d, f; n = 5) due to issues with facility temperature control. Open symbols represent day-time measurements, whereas dark symbols represent periods of night-time. Dissimilar lower case letters indicate a significant difference within photoperiod (night-time values in bold), while an asterisk (*) indicates a significant difference between day-time and night-time values. Data are means ± S.E.M, with each value representing the average of n = 6 data points per fish

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