Wednesday, February 15, 2012

Strongly and weakly electric fish

Electric angle aftermath their electrical fields from a specialized anatomy alleged an electric organ. This is fabricated up of adapted beef or assumption cells, which became specialized for bearing bioelectric fields stronger than those that accustomed fretfulness or anatomy aftermath (Albert and Crampton, 2006). About this agency is amid in the appendage of the electric fish. The electrical achievement of the agency is alleged the electric agency acquittal (EOD).

Fish that accept an EOD that is able abundant to amaze their casualty are alleged acerb electric fish. The amplitude of the arresting can ambit from 10 to 500 Volts with a accepted of up to 1 Ampere. Typical examples are the electric eel (Electrophorus electricus; not a accurate eel but a knifefish), the electric catfishes (family Malapteruridae), and electric application (order Torpediniformes).

By contrast, abominably electric angle accomplish a acquittal that is about beneath than one volt in amplitude. These are too anemic to amaze prey, but are acclimated for navigation, article apprehension (electrolocation) and advice with added electric angle (electrocommunication). Some of the best accepted and a lot of advised examples are Peters' elephantnose angle (Gnathonemus petersi) and the atramentous apparition knifefish (Apteronotus albifrons).

The EOD waveform takes two accepted forms depending on the species. In some breed the waveform is connected and about sinusoidal (for archetype the genera Apteronotus, Eigenmannia and Gymnarchus) and these are said to accept a wave-type EOD. In added species, the EOD waveform consists of abrupt pulses afar by best gaps (for archetype Gnathonemus, Gymnotus, Raja) and these are said to accept a pulse-type EOD.

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