Stichting De Traditie - Electroreception videos
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(3 Mb mpg).
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(7 Mb mpg).
Apteronotus albifrons (linnaeus, 1766)
- A single specimen of Apteronotus
albifrons
(Linnaeus, 1766), emitting wave-type Electric Organ Discharges with a
frequency of about 800 Hz. In this video the
EODs were recorded with two stainless steel rod electrodes at the left
of the tank, and made audible via a speaker. Apteronotus
swims as easily backward as forward. The electric sense mediates
the location of objects and walls. As most electroreceptive fish they
rely greatly on the electric sense in the turbid waters they live in
(recording by Dr. Tim van Wessel).
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- Two
specimens of Apteronotus
albifrons (Linnaeus, 1766), emitting wave-type Electric Organ
Discharges with a frequency of about 800 Hz, and showing the Jamming
Avoidance Response and chirping.
When a second specimen is introduced, the EODs interfere. In order to
avoid unwanted interference both fish shift their discharge frequencies
in opposite directions. This behavior is called the 'Jamming Avoidance
Response' (JAR).
Agonistic interactions are accompanied by 'chirps', sudden changes in
the otherwise regular discharges (recording by Dr. Tim van Wessel).