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Rossi-Santos MR, Filun D, Soares-Filho W, Paro AD, Wedekin LL. “Playing the beat”: Occurrence of Bio-duck calls in Santos Basin (Brazil) reveals a complex acoustic behaviour for the Antarctic minke whale (Balaenoptera bonaerensis). PLoS One 2022; 17:e0255868. [PMID: 36107936 PMCID: PMC9477358 DOI: 10.1371/journal.pone.0255868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/27/2022] [Indexed: 11/19/2022] Open
Abstract
The Antarctic minke whale (Balaenoptera bonaerensis) (AMW) is one of the smallest species among baleen whales, occurring in the southern hemisphere from Antarctica to near the equator, and performing seasonal migrations from polar to tropical waters. Information about (AMW) occurrence in the winter breeding grounds is scarce, mostly coming from old records from whaling stations before the 1960’s international moratorium, such as Costinha Station in Northeastern Brazil (6° S / 34° W) and some sightings from few dedicated visual surveys. Acoustic methods can provide important data on the occurrence and distribution of migratory species. This work describes the occurrence of the Antarctic minke whale through acoustic detections of their “Bioduck” vocalisations in the Santos Basin, South-Southeastern Brazil (22° and 28° S / 42° and 48° W). Data was recorded between November 12 and December 19, 2015. AMW calls were detected for 12 days. We detected and classified 9 different Bio-duck calls in Brazilian coastal waters, evidencing a highly diverse acoustic behavior for the minke whale breeding ground. This is the first attempt to describe the acoustic diversity of AMW vocalizations in lower latitudes, contributing important information for future conservation efforts and management of AMW populations and their habitat. Therefore, our study presents the foremost acoustic evidence of the Antarctic minke whale in Brazilian coastal waters.
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Affiliation(s)
- Marcos R. Rossi-Santos
- Laboratório de Ecologia Acústica e Comportamento Animal/ Acoustic Ecology and Animal Behaviour Laboratory, Centro de Ciências Agrarias, Ambientais e Biológicas, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, Bahia, Brazil
- Projeto de Monitoramento de Cetáceos da Bacia de Santos- Petrobras/ Cetacean Monitoring Project in Santos Basin, Socioambiental Consultores Associados, Florianópolis, Santa Catarina, Brazil
- * E-mail: (MRRS); (DF)
| | - Diego Filun
- Ocean Acoustics Lab, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
- * E-mail: (MRRS); (DF)
| | - William Soares-Filho
- Projeto de Monitoramento da Paisagem Acústica Submarina da Bacia de Santos- Petrobras/ Underwater Soundscape Monitoring Project in Santos Basin, Instituto de Pesquisas da Marinha, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alexandre D. Paro
- Projeto de Monitoramento de Cetáceos da Bacia de Santos- Petrobras/ Cetacean Monitoring Project in Santos Basin, Socioambiental Consultores Associados, Florianópolis, Santa Catarina, Brazil
- Marine Biotechnology Program, Instituto de Estudo do Mar Almirante Paulo Moreira, Arraial do Cabo, Rio de Janeiro, Brazil
| | - Leonardo L. Wedekin
- Projeto de Monitoramento de Cetáceos da Bacia de Santos- Petrobras/ Cetacean Monitoring Project in Santos Basin, Socioambiental Consultores Associados, Florianópolis, Santa Catarina, Brazil
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