Abnormal behaviour in trout after venom or vinegar

Authors: Sneddon, et al
Journal: Proceeding of the Royal Society London 270, 1115-1121
Year: 2003
Where: Roslin Institute and University of Edinburgh
A nociceptor is a sensory receptor that reacts to potentially damaging stimuli by sending nerve signals to the spinal cord and brain. This process is called nociception.

Rainbow trout had injected into their lips either bee venom or acetic acid (vinegar). A control group was handled but received no injection.

Effect on the fish:

  • Respiration rate nearly doubled
  • No feeding for 3 hours (twice as long as the control group)
  • Reduced swimming activity
  • Rocking motion, balancing on either pectoral fin, while resting on the gravel
  • Rubbed their lips into the gravel and tank walls

Fish Pain