In this experiment a toal of 83 adult cod were exposed, 53 specimen were exposed at 60 V and 30 specimen twice above the maximum commercially applied amplitude (120 V). In 5 cases vertebral injuries occurred of which 4 at 120 V and a single one at 60 V. When the type of stimulus is taken in account this single injury at 60 V amplitude represents an injury rate of 4.5 % of 22 exposed fish and 13% at 120 V (4 oout 30 specimen). Despite the same electrical parameters were set, none of the 21 fish exposed to the ILVO pulse generator was injured. All injuries occurred using the Delmeco TX68 pulse shape.
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