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Updated: Jan 20, 2026

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication
Published on: June 5, 2016
High-frequency social communication in Sotalia guianensis
Mariana Barbosa1, Lis Bittencourt1, Luciana G Andrade2
1Laboratório de Mamíferos Aquáticos e Bioindicadores, Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, Rio de Janeiro, 20550-013, Brazilmarib66@gmail.com, lis.bitt@gmail.com.
Abstract:
This study aimed to investigate the use of high ultrasonic frequencies (above 40 kHz) in the Sotalia guianensis whistle repertoire. The whistles were classified as high-frequency (HF) whistles and very high-frequency (VHF) whistles. Seven parameters were extracted and a general linear mixed effects model was performed between the total number of whistles and VHF ones. Frequency parameters of HF and VHF whistles were the highest reported for this species so far. However, VHF whistles were rare and occurred in situations of high acoustic activity, which may represent a strategy used by dolphins to deal with higher levels of vocalization rates.
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