In goldfish the heart rate orienting response to periodic photic stimuli was measured by a specially designed computer that also regulated the intensity of the stimuli to maintain the response. When ethanol was administered, the fish then exhibited orienting responses to less intense stimuli; this increased excitability was maintained for the duration of all tests(i.e., a maximum of 26 hours). There also seemed to be a residual increase of excitability lasting as long as 7 days after the ethanol was administered.
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Offutt, G.C., Gritzke, R.R. Ethanol’s influence on the stimulus level required to evoke an orienting response in goldfish. Pav. J. Biol. Sci. 13, 113–120 (1978). https://doi.org/10.1007/BF03000673
- Stimulus Intensity
- Stimulus Level
- Orienting Response
- Intense Stimulus
- Siamese Fighting Fish