Dear colleagues, My co-authors and I are pleased to announce our new publication: Lima, A., Lopes, L.C., de Melo, J.F., Froes, E., De Carli, R.C., Bassoi, M., Sousa-Lima, R.S., dos Santos, M.E., Gonçalves, M.I.C. (2024). Bray calls emitted by common bottlenose dolphins (*Tursiops truncatus*) in offshore waters of northeastern Brazil. Marine Mammal Science, e13160. https://doi.org/10.1111/mms.13160
Underwater acoustic emissions of common bottlenose dolphins (*Tursiops truncatus*) have been extensively studied worldwide, revealing diverse acoustic repertoires across populations. This study documents the first recording of bray calls in offshore waters (>200m depth) off Ilhéus, Bahia, Brazil. Conducted during environmental monitoring for a port construction project, acoustic recordings were made from December 2021 to December 2022 using high-resolution equipment. Bray calls, characterized by sequences of squeaks, gulps, and grunts, were detected primarily during foraging activities of a large group, including 27 individuals. Acoustic parameters of these calls were analyzed, revealing variability in frequency and duration compared to previous studies. Behavioral observations suggest a potential social or feeding context for these emissions. The presence of bray-whistle sequences further suggests a coordinated function during group activities. This study contributes to the understanding of acoustic diversity and geographical variation in dolphin vocalizations, emphasizing the need for comprehensive reporting to elucidate the ecological and behavioral significance of bray calls across global populations. A PDF copy of the publication can be downloaded from: https://onlinelibrary.wiley.com/doi/10.1111/mms.13160 Best regards, Alice Lima -- Dr. Alice Lima Post-doc researcher from GPMAI Grupo de Pesquisa em Mamíferos Aquáticos de Ilhéus Programa de Pós-graduação em Sistemas Aquáticos Tropicais - PPGSAT Grupo de Pesquisa em Mamíferos Aquáticos de Ilhéus - GPMAI Ilhéus - Brazil
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