| whistles of small groups of sotalia fluviatilis during foraging behavior in southeastern brazil. | whistle emissions were recorded from small groups of marine tucuxi dolphins (sotalia fluviatilis) in two beaches located in an important biological reserve in the cananéia estuary (25 degrees 03's, 47 degrees 58'w), southeastern brazil. a total of 17 h of acoustic data was collected when dolphins were engaged in a specific feeding foraging activity. the amount of 3235 whistles was recorded and 40% (n=1294) were analyzed. seven acoustic whistle parameters were determined: duration (ms), number of ... | 2005 | 16266192 |