Abstract:Sotalia fluviatilis was the only cetacean species observed in all 16 boat surveys (82 h) conducted in the Sepetiba Bay (22° 58′, 44° 02′W), between December 1993 and August 1995. During the boat survey of 5 January, 1995—a very calm day (Beaufort = 1)—it was possible to make good subaquatic sound recordings (30 min) of a group of ca. 20 young and subadult dolphins. As there is little bioacoustic information on tucuxi, sonogram analysis was used to characterize the tucuxi’s whistles of ascendent frequency. The … Show more
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