January). WWW JUDAS Documentation, http://soma.npa.uiuc.edu/labs/nelson/docs/JUDAS.html
- Payne, Jeremy
- edn. Beckman Institute,
Catf ish possess a passive electrosense. In order to determine some basic properties of this unusual mode of sensation, individual ampullary electroreceptors of the catf ish Ictaluras puntatus were recorded extracellularly while under focal stimulation from a dipole stimulator. Two stimulus regimes were used: a sine wave of f ixed frequency with varying amplitude, and one of f ixed amplitude with varying frequency. These data enabled the determination of a f iring rate versus frequency of stimulation relation, and a receptor sensitivity relation. With this information the issue of the f it of the receptors to their purported function of f inding small prey just below the water substrate is addressed.