Killer whale (Orcinus orca) whistles from the western South Atlantic Ocean include high frequency signals

Artur Andriolo, Sarah S. Reis, Thiago O. S. Amorim, Federico Sucunza, Franciele R. de Castro, Ygor Geyer Maia, Alexandre N. Zerbini, Luciano Dalla Rosa, Guilherme A. Bortolotto

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Acoustic parameters of killer whale (Orcinus orca) whistles were described for the western South Atlantic Ocean and highlight the occurrence of high frequency whistles. Killer whale signals were recorded on December of 2012, when a pod of four individuals was observed harassing a group of sperm whales. The high frequency whistles were highly stereotyped and were modulated mostly at ultrasonic frequencies. Compared to other contour types, the high frequency whistles are characterized by higher bandwidths, shorter durations, fewer harmonics, and higher sweep rates. The results add to the knowledge of vocal behavior of this species.
Original languageEnglish
Pages (from-to)1696–1701
JournalJournal of the Acoustical Society of America
Volume138
Issue number3
DOIs
Publication statusPublished - 30 Sept 2015

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