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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Electroreception of catfish Ictalurus nebulosus in uniform and non-uniform DC fields: detection threshold and body length

Lonneke Eeuwes, Robert Peters, Franklin Bretschneider and Wim Loos (2001)

Electroreception of catfish Ictalurus nebulosus in uniform and non-uniform DC fields: detection threshold and body length

BELGIAN JOURNAL OF ZOOLOGY, 131(S2):73-78.

Catfish are able to detect electric fields with their electroreceptor organs. It goes without saying that the electrodetection threshold depends on the sensitivity of the electroreceptor organs. The sensitivity in turn depends on a variety of extrinsic factors such as water temperature, conductivity, and electric field frequency. The aim of this study was to determine the effect of an intrinsic characteristic, namely body length, on the electrodetection threshold. In a two-alternatives forced-choice experiment, catfish of different sizes were tested in uniform or non-uniform direct-current fields. The results show no significant relation between body length and electrodetection threshold. The electrodetection thresholds are lower in uniform fields than in nonuniform fields. From this it is concluded that other factors than body size alone determine the electrodetection threshold.

electroreception; body length; catfish; behaviour; threshold
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

 



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Annales de la Société malacologique de Belgique
 
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Belgian Journal of Zoology