Abstract

The spawning of the ejaculation can be induced in Mytilus edulis by a faradic stimulation (50 cycles). A stimulation of 20 volts, and 5 seconds duration is sufficient to induce the discharge of every ripe mussel. About 1 hour after the stimulation the mussel begins to discharge the reproductive substances. The reaction time and the duration of stimulation have no definite relation to the strength or to the duration of stimulation. The mode of discharge by an electrical stimulation is quite the same as the natural spawning or ejaculation. The ova thus discharged are all matured and can be easily fertilized by spermatozoa, which can be discharged also by the same way as the ova.

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