Cetacean records along a coastal-offshore gradient in the Vitoria-Trindade Chain, western South Atlantic Ocean/Registros de cetaceos ao longo de um gradiente costeiro-pelagico na Cadeia Vitoria-Trindade, Oceano Atlantico Sul ocidental

Oceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vito...

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Bibliographic Details
Published in:Brazilian journal of biology 2014-02, Vol.74 (1), p.137-137
Main Authors: Wedekin, L.L, Rossi-Santos, M.R, Baracho, C, Cypriano-Souza, A.L, Simoes-Lopes, P.C
Format: Article
Language:English
Subjects:
Animal behavior
Cetacea
Dolphins & porpoises
Islands
Marine
Musical performances
Population
Studies
Whales & whaling
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Summary:Oceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vitoria-Trindade seamounts. The researchers observed 19 groups of cetaceans along a 1,300-km search trajectory, with six species being identified: the humpback whale, the fin whale, the Antarctic minke whale, the rough-toothed dolphin, the bottlenose dolphin, and the killer whale. Only one lone humpback whale was observed near Trindade Island after a search effort encompassing more than 520 km. From a total of 28 acoustic stations, humpback whale songs were only detected near the seamounts close to the Abrolhos Bank, where most groups of this species were visually detected. Finally, they observed a significant number of humpback whales along the seamounts close to the Abrolhos Bank, which may function as a breeding habitat for this species.
ISSN:1519-6984
1678-4375
DOI:10.1590/1519-6984.21812