Control (or unshocked) and shocked (or test) rainbow trout (Salmo gairdneri) were held through spawning to determine the effects of electrical shock on the survival, growth, and fecundity of two year classes—young of the year of the 1953 year class and yearlings of the 1952 year class—and on the survival of the eggs and of the fry of the exposed fish. The test groups were exposed for 30 sec to one of two sets of electrical conditions—the young of the year to a pulse frequency of 8 pulses/sec, a pulse duration of 40 milliseconds, and a voltage gradient of 1 volt/cm; and the yearlings to a pulse frequency of 5 pulses/sec, a pulse duration of 60 milliseconds, and a voltage gradient of 0.75 volt/cm. The exposure was longer than that usually encountered by fish during either electrical fish guiding or collection with a pulsating direct-current shocker. The survival, growth, and fecundity of the fish apparently were not affected by the electrical shock, nor were the survival and development of their offspring.
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Maxfield et al. (1971) studied this question.