title: Social sounds produced by franciscana dolphins, Pontoporia blainvillei (Cetartiodactyla, Pontoporiidae).
abstract: Franciscana dolphin (Pontoporia blainvillei) whistles were documented for the first time during 2003-2013 in Babitonga Bay estuary, South Brazil, together with burst pulses. Recordings were made from small boats under good sea conditions, and recording equipment that allowed analysis of sounds up to 96 kHz. The recordings were made in the presence of 2-31 franciscana dolphins. During 23 h and 53 min, 90 whistles and 51 burst pulse series were recorded. Although Guiana dolphins (Sotalia guianensis) inhabit nearby waters, none were observed in the area during the recordings. The authors recorded ten types of whistles. The initial frequency varied between 1.6 and 94.6 kHz, and the final frequency varied between 0.7 and 94.5 kHz; the authors were not able to determine if dolphin whistles exceeded the 96 kHz recording limit of the authors' equipment, although that is likely, especially because some whistles showed harmonics. Whistle duration varied between 0.008 and 0.361 s. Burst pulses had initial frequencies between 69 and 82.1 kHz (77 ± 3.81). These results showed that P. blainvillei produces whistles and burst pulses, although they seem to be produced infrequently.
authors.affiliation: Projeto Toninhas, Universidade da Região de Joinville, UNIVILLE, P.O. Box 110, 89240-000, São Francisco do Sul, Santa Catarina, Brazil.
authors.forename: Marta Jussara
authors.initials: MJ
authors.lastname: Cremer
authors.affiliation: Projeto Toninhas, Universidade da Região de Joinville, UNIVILLE, P.O. Box 110, 89240-000, São Francisco do Sul, Santa Catarina, Brazil.
authors.forename: Annelise Colin
authors.initials: AC
authors.lastname: Holz
authors.affiliation: Fundación Aquamarina, Del Besugo 1525, (7167) Pinamar, Buenos Aires, Argentina.
authors.forename: Pablo
authors.initials: P
authors.lastname: Bordino
authors.affiliation: Sarasota Dolphin Research Program, Chicago Zoological Society, c/o Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, Florida 34236, USA.
authors.forename: Randall S
authors.initials: RS
authors.lastname: Wells
authors.affiliation: Laboratório de Mamíferos Aquáticos, Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, P.O. Box 5102, 88040-970, Santa Catarina, Brazil.
authors.forename: Paulo César
authors.initials: PC
authors.lastname: Simões-Lopes
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000818:Animals; D001938:Brazil; D004289:Dolphins / Q000145:classification / Q000502:physiology* / Q000523:psychology; D004867:Equipment Design; D005260:Female; D008297:Male; D009038:Motion; D010363:Pattern Recognition, Automated; D011156:Population Density; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D012919:Social Behavior; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure; D014828:Vocalization, Animal; D014867:Water
chemical_list: D014867:Water