dilution is limited primarily in its sensitivity. However, this is of concern only if very small numbers of organisms are suspected in a particular specimen, because the lower limits of detection for a 10-μL aliquot of undiluted material would be approximately 100 cfu/mL. There exists the possibility of crossing of paths as the plates are tilted. We experienced this problem only: (i) on media t...

During their entire lives, weakly electric fish produce an uninterrupted train of discharges to electrolocate objects and to communicate. In an attempt to learn about activity-dependent processes that might be involved in this ability, the continuous train of discharges of intact Gymnotus carapo was experimentally interrupted to investigate how this pausing affects post-pause electric organ dis...