Summary
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1.
A repertoire of five probing motor acts (PMAs) is used by Marcusenius cyprinoides in the exploratory behaviour of novel objects, introduced into the fish's surroundings: chin probing, ‘va et vient,’ lateral probing, tangential probing, and stationary probing.
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2.
Four of these PMAs are displayed at a defined distance from the object: 6.8±0.4 cm for a metallic rod and 3.1±0.5 cm for a porous porcelain tube.
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3.
The exploratory behaviour is accompanied by the appearance of a characteristic electric organ discharge activity mode in the interpulse interval histogram. This pattern is typically emitted during va et vient, but occurs also during other acts of exploratory behaviour.
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4.
The results indicate that PMAs are probably used to reproducably determine the conductivity characteristics of an object.
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The stay of M.J. Toerring in the C.N.R.S. at Gif-sur-Yvette is supported by a grant of the Dr. Carl Duisberg Foundation, Bad Tölz, West-Germany
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Toerring, M.J., Belbenoit, P. Motor programmes and electroreception in mormyrid fish. Behav Ecol Sociobiol 4, 369–379 (1979). https://doi.org/10.1007/BF00303243
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DOI: https://doi.org/10.1007/BF00303243