title: Killer whale (Orcinus orca) whistles from the western South Atlantic Ocean include high frequency signals.
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.
authors.affiliation: Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Artur
authors.initials: A
authors.lastname: Andriolo
authors.affiliation: Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Sarah S
authors.initials: SS
authors.lastname: Reis
authors.affiliation: Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Thiago O S
authors.initials: TO
authors.lastname: Amorim
authors.affiliation: Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Federico
authors.initials: F
authors.lastname: Sucunza
authors.affiliation: Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Franciele R
authors.initials: FR
authors.lastname: de Castro
authors.affiliation: Instituto Aqualie, Avenue Dr. Paulo Japiassu Coelho, 714 - Sala 206, Cascatinha, 36033-310, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Ygor Geyer
authors.initials: YG
authors.lastname: Maia
authors.affiliation: Alaska Fisheries Science Center, NOAA Fisheries, 7600 Sand Point Way NE, Seattle, Washington 98115, USA.
authors.forename: Alexandre N
authors.initials: AN
authors.lastname: Zerbini
authors.affiliation: Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Km 16 - BR-415, BA, 45662-900, Ilhéus, Bahia, Brazil.
authors.forename: Guilherme A
authors.initials: GA
authors.lastname: Bortolotto
authors.affiliation: Instituto de Oceanografia, Universidade Federal de Rio Grande, Avenue Itália km 8, Bairro Carreiros, 96.203-900, Rio Grande, Brazil.
authors.forename: Luciano
authors.initials: L
authors.lastname: Dalla Rosa
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D011571:Psychoacoustics; D012919:Social Behavior; D013018:Sound Spectrography; D014828:Vocalization, Animal / Q000502:physiology*; D050685:Whale, Killer / Q000502:physiology*