Abstract
Underwater vocalizations from a small group of fin whales were recorded from the U.S. National Science Foundation’s (NSF) research vessel ‘‘Hero’’ in Golfo de Penas, Chile, May, 1970. The most outstanding and frequent vocalizations were patterned utterances of about 1.5-s duration that swept upward from about 35 to 65 Hz. Endings typically were emphasized with an outstanding increase in sound level. The second most frequent type of vocalization was 1-s downward sweeps in a range of about 100–30 Hz. Both types occurred in small groupings with evenly spaced intersound intervals of about 8.5 s (upsweeps) and about 4 s (downsweeps). These sterotyped vocalizations had acoustical characteristics that were very similar to those of sounds that we had recorded from fin whales in the Gulf of California (Mexico) during 1969. [Work supported by NSF.]
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