Figure 7. The correlations between the two main peaks indicate different responsiveness of the electrocytes.

The late negative peaks (V₄) recorded in air gap conditions from 6 regions of the body were plotted as a function of the main positive peaks (V₃) recorded from the same 6 regions. It is shown that the relationship between these components is similar in different fish. Different symbols indicate different specimens (G omari N = 10; G. carapo N = 4; G coropinae N = 10). In G. omari V₃ is generally larger than V₄ while in G carapo and G. coropinae they are similar. Since the putative mechanism of V₄ is the propagation of the action potential causing V₃ to the opposite electrocyte face, changes in the slope indicate that the responsiveness of the electrocytes is different for each species-the lowest for G. omari, and the largest for G. coropinae.