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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Variability of the bioelectric field of the catfish Ictalurus nebulosus (Le Sueur, 1819; Pisces, Teleostei, Siluriformes)

Robert Peters, Cor van Honk and Franklin Bretschneider (2001)

Variability of the bioelectric field of the catfish Ictalurus nebulosus (Le Sueur, 1819; Pisces, Teleostei, Siluriformes)

BELGIAN JOURNAL OF ZOOLOGY, 131(S2):45-47.

The electric dc-field of Ictalurus nebulosus (Teleostei, Siluriformes) was recorded by having two specimens swim through a silk screen cylinder at 5 cm distance from two recording electrodes, during an observation period of three months. The dc-field was usually rather stable; on average potential differences of 37 and 55 mu V in water with resistivities of 33 and 48 ohm. m respectively were recorded. From time to time the field strength suddenly increased by a factor of 10, after which the field returned to the original value within about 15 min. Increases of field strength could also be evoked by presenting food, ``beef juice'', and by approaching the tank. We propose that the recorded changes in bioelectric field strength reveal a particular, perhaps stress-or arousal-related, physiological condition, and that they are sufficiently strong to be perceived by electrosensitive conspecifics.

Ictalurus nebulosus; lateral line; electroreception; electric field; bioelectric field; transdermal potential; electrocommunication
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
1923-1989
Annales de la Société Royale Zoologique de Belgique
 
1989-
Belgian Journal of Zoology