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Journal of Experimental Biology 56,105-118 (1972)
Published by Company of Biologists 1972

Activity of Lateral-Line Sense Organs in Swimming Dogfish

B. L. ROBERTS ¹

¹ The Laboratory of the Marine Biological Association, Plymouth

1. The activity of lateral-line sense organs was studied in swimming spinal dogfish by recording from filaments of the lateral-line nerve dissected in an anterior immobile part of the fish, the rest of the fish being free to move.

2. In a non-swimming fish most of the receptors were spontaneously active, discharging at 15-20 impulses/sec.

3. When the part of the body overlying the receptor was flexed, the impulse frequency was either enhanced or depressed, depending on the direction of movement.

4. In swimming spinal dogfish the sense organs discharged in bursts at the same frequency as the swimming rhythm.

5. The lateral-line receptors could provide information which would be useful in locomotory co-ordination, for the burst length, frequency, discharge frequency and number of impulses in the rhythmical discharge could all be correlated with the swimming movements.

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