01327nas a2200133   4500008004100000245008100041210006900122300001200191490000600203520085700209100001601066700002801082856008301110       2006                        eng d00aA portable bio-amplifier for electric fish research: design and construction0 aportable bioamplifier for electric fish research design and cons  a295-2990 v43 a<p>The weak electric organ discharges (EODs) of gymnotiform knife fishes can be readily amplified with a wideband amplifier connected to submerged electrodes. The output from such an amplifier can then be monitored with audio speakers or digitized for subsequent analysis. Commercially available devices are expensive and usually require mains electrical power. Here we provide design notes and instructions for the construction and calibration of a cheap, portable, battery-powered, AC-coupled wideband bio-amplifier. This device was designed to allow electric fishes to be located in the field, and also to permit the relatively noise-free acquisition of EOD waveforms from specimens held in temporary captivity. This contribution is intended to encourage students of neotropical ichthyology to explore electric signaling in gymnotiform fishes.</p>
1 aWells, J.K.1 aCrampton, William, G.R.  uhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200018