Abstract
Brown trout, Salmo trutta, were allowed to thermoregulate individually in an electronic shuttlebox. Pooled data for 6 fish showed a diel pattern of preferred temperature, with a diurnal minimum of 10.3°C, an early nocturnal maximum of 13.7°C, a less pronounced mid-scotophase minimum of 11.7°C, and a secondary dawn maximum of 12.8°C, in a somewhat crepuscular pattern. The 24-hour mean preferendum was 12.2°C.
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References
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Reynolds, W.W., Casterlin, M.E. Thermoregulatory behavior of brown trout, Salmo trutta. Hydrobiologia 62, 79–80 (1979). https://doi.org/10.1007/BF00012567
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DOI: https://doi.org/10.1007/BF00012567