| Conclusions (5487 words) |
 | Although they are closely related, the species in Apteronotus have a neurogenically powered electric organ, and produce a frequency as a firing of neurons, while the fish in genus Eigenmannia have a myogenically powered weakly electric organ, producing a frequency by their muscle contractions. |
| Therefore, during the actual JAR tests, it was the tendency to return to the original frequency that pulled the fish stronger than the tendency of the function generator to cause the fish to avoid jamming and move away from the generator. |
| Both Apteronotus moved away from their original frequencies after the 4.5-hour tests, suggesting prolonged jamming response by further separating the fishÂ’s frequency from the frequency that the fish was exposed to, and further moving from the original frequency. |
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