. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 246 Bulletin So. Calif. Academy Sciences / Vol. ^5, No. 4, ic>66. Figure 1. Kogia breviceps (Blainville), pigmy sperm whale. Male, 242 cm. in snout to caudal-notch length, alive at Marineland of the Pacific, California. Stranded at Playa del Key, Los Angeles County, California, on July 13, 1966, and sound-recorded the following day. Skeleton now preserved in the marine mammal collections of the Los Angeles County Museum of Natural History, number 27068. shown experimentally (see summaries o
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 246 Bulletin So. Calif. Academy Sciences / Vol. ^5, No. 4, ic>66. Figure 1. Kogia breviceps (Blainville), pigmy sperm whale. Male, 242 cm. in snout to caudal-notch length, alive at Marineland of the Pacific, California. Stranded at Playa del Key, Los Angeles County, California, on July 13, 1966, and sound-recorded the following day. Skeleton now preserved in the marine mammal collections of the Los Angeles County Museum of Natural History, number 27068. shown experimentally (see summaries of this evidence in Norris, 1964, and in Evans, In press.) The sounds that we recorded (Fig. 2) are low in intensity and low in frequency (almost all of the recorded energy below two kHz, and mostly one kHz or less). While we do not choose to postulate how these results might compare with sounds produced by normal animals of this species in the water in the wild, the sounds produced by our captive animal, even though out of water, suggest that Kogia breviceps., like many cetaceans, is indeed capable of producing pulsed sounds, at variable repetition rates, in a series usually termed Click Trains. Thus the actual recording of such sounds correlates positively with the anatomical evidence suggested earlier by Wood and by Norris. Recording Equipment The sounds reported here were recorded with an air microphone and a Uher model 4000 Report-S tape recorder operating at a tape speed of inches (19 cm.) per second. At this tape speed the re- corder had a flat response of 40 to 20,000 cycles per second. The Sona- grams (sound spectrograms) were prepared on a Kay Sona-Graph model 662A Sound Spectrograph Analyzer calibrated from 85 to 6000 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Aca
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