Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
Volume 355, Issue 1401, Pages 1295-1298Publisher
ROYAL SOC LONDON
DOI: 10.1098/rstb.2000.0687
Keywords
acoustic fish barrier; fish migration; inertial navigation; infrasound; linear acceleration; orientation
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Fishes have an acute sensitivity to extremely low-frequency linear acceleration, or infrasound, even down to below 1 Hz. The otolith organs are the sensor!: system responsible for this ability The hydrodynamic noise generated by swimming fishes is mainly in the infrasound range, and may be important in courtship and predator interactions. Intense infrasound has a deterring effect on some species, and has a potential in acoustic barriers. We hypothesize that the pattern of ambient infrasound in the oceans may be used for orientation in migratory fishes, and that pelagic fishes may detect changes in the surface wave pattern associated with altered water depth and distant land formations. We suggest that the acute sensitivity to linear acceleration could be used for inertial guidance, and to detect the relative velocity of layered ocean currents. Sensitivity to infrasound may be a widespread ability among aquatic organisms, and has also been reported in cephalopods and crustaceans.
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