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A J Kalmijn

Publications and source records attributed to A J Kalmijn.

4 recordsLinked to original sources

Electric and near-field acoustic detection, a comparative study.

The acceleration fields in the vicinity of quietly moving prey are governed by the same mathematical equation as the bioelectric fields aquatic animals produce. Hence, to reach their prey, predatory fish may use the inertial sense organs of the inner ear in a similar fashion as sharks and rays use the electroreceptors, the ampullae of Lorenzini. Besides the acceleration fields, predatory fish may detect the velocity fields of the prey, responding to the accelerations the inner ear receives from the spatial differences in the velocity experienced over time due to the relative motion between predator and prey.

Acoustics↗

Electric and magnetic field detection in elasmobranch fishes.

Sharks, skates, and rays receive electrical information about the positions of their prey, the drift of ocean currents, and their magnetic compass headings. At sea, dogfish and blue sharks were observed to execute apparent feeding responses to dipole electric fields designed to mimic prey. In training experiments, stingrays showed the ability to orient relative to uniform electric fields similar to those produced by ocean currents. Voltage gradients of only 5 nanovolts per centimeter would elicit either behavior.

Animals↗