Abstract
Marine sharks, skates, and rays are endowed with an electric sense that enables them to detect voltage gradients as low as 0.01 μV/cm within the frequency range of direct current (DC) up to about 8 Hz. Their electroreceptor system comprises the ampullae of Lorenzini, which are delicate sensory structures in the snouts of these elasmobranch fishes. Sharks, skates, and rays use their electric sense in prédation, sharply cueing in on the DC and low-frequency bioelectric fields of their prey. Swimming through the earth’s magnetic field, they also induce electric fields that may provide them with the physical basis of an electromagnetic compass sense. Their ability to orient magnetically has in fact been demonstrated in recent training experiments.
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References
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© 1978 Springer-Verlag Berlin Heidelberg
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Kalmijn, A.J. (1978). Experimental Evidence of Geomagnetic Orientation in Elasmobranch Fishes. In: Schmidt-Koenig, K., Keeton, W.T. (eds) Animal Migration, Navigation, and Homing. Proceedings in Life Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-11147-5_34
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DOI: https://doi.org/10.1007/978-3-662-11147-5_34
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