Data/hora: 08/06/2024 18:57:33

Provedor de dados: | 42
País: | Brazil
Título: | Analysis of whistles produced by the Tucuxi Dolphin Sotalia fluviatilis from Sepetiba Bay, Brazil
Autores: | Erber,Claudia; Simão,Sheila M.
Data: | 2004-06-01
Ano: | 2004
Palavras-chave: | Sotalia fluviatilis; Cetacea; Delphinidea; Vocal repertoire; Whistles; Behavior.
Resumo: | From July 2001 to June 2002, we recorded a total of 2h55min of Tucuxi Dolphin Sotalia fluviatilis vocalizations from Sepetiba Bay, Brazil (22º35'S-44º03'W). A total of 3350 whistles were analyzed quantitative and qualitatively and were divided into 124 types, by visual inspection of sonograms. The following parameters were measured: Initial Frequency, Final Frequency, Minimum Frequency, Maximum Frequency, Duration, Number of Inflections, Frequency at the Inflection Points, Frequency at 1/2, 1/4, and 3/4 of whistle duration, Presence of Frequency Modulation and Harmonics. Ascending type whistles (N=2719) were most common, representing 82% of the total. Dolphin behavior and average group size observed during recording influenced the whistle's quantitative and qualitative parameters. The results demonstrate the great diversity of whistles emitted and indicate a functional role of these vocalizations during the observed behaviors.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200029
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652004000200029
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.76 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess