ON THE RESPONSE OF CATLA CATLA (HAM) AND CIRRHINUS MRIGALA (HAM) TO THE VOLTAGE GRADIENT OF ELECTRICAL FIELD

Abstract

The threshold body voltage (voltage gradient between head
and tail) required for first reaction, electro-taxis and electronarcosis
depended upon species, conductivity of the fish body, nature of
current and wave shape. Larger fishes showed first reaction at a
lower body voltage than smaller ones. All the three reactions were
dependent on the accommodation of nerves to the electrical field
and subsequent fatigue of the fishes. No significant change was
observed in the period of narcosis and recovery after repeated