Cetacean occurrence near an offshore oil platform in southern Brazil

Autores

  • Marta Jussara Cremer
  • André Silva Barreto
  • Fernando Augusto Sliva Hardt
  • Antonio José Tonello Júnior
  • Roberta Mounayer

DOI:

https://doi.org/10.5007/2175-7925.2009v22n3p247

Palavras-chave:

Tursiops truncatus, Balaenoptera acutorostrata, Oil platform, Aggressive interaction

Resumo

Information about cetaceans in offshore Brazilian waters is scarce, and oil-rigs could provide an important opportunity to obtain new data. The present work was conducted on the P-XIV oil-rig (Petrobrás) (26o46’02.2”S; 46o47’02.15”W), located on the border of the continental slope, in an area of 200m depth. In the period between July 2000 and August 2002, 75 sightings of cetaceans were recorded during 38 days of effort. Among the species identified, Tursiops truncatus was the most common, corresponding to 53.3% of the records. Among the misticets, only Balaenoptera acutorostrata was identified with accuracy, with 4 records (5.3%). These were the only species that approached and stayed close to the oil-rig. Many records were made at night, when the gas burner illuminated the area around the oil-rig. We recorded an aggressive interaction involving T. truncatus and B. acutorostrata.

Biografia do Autor

Marta Jussara Cremer

Laboratório de Nectologia, Departamento de Ciências Biológicas
Universidade da Região de Joinville
Caixa Postal 110, CEP 89240-000, São Francisco do Sul – SC, Brazil

André Silva Barreto

Laboratório de Oceanografia Biológica
Centro de Educação Superior de Ciências Tecnológicas da Terra e do Mar
Universidade do Vale do Itajaí, Rua Uruguai, 458, CEP 88302-202, Itajaí – SC, Brazil

Fernando Augusto Sliva Hardt

Laboratório de Nectologia, Departamento de Ciências Biológicas
Universidade da Região de Joinville
Caixa Postal 110, CEP 89240-000, São Francisco do Sul – SC, Brazil

Antonio José Tonello Júnior

Laboratório de Nectologia, Departamento de Ciências Biológicas
Universidade da Região de Joinville
Caixa Postal 110, CEP 89240-000, São Francisco do Sul – SC, Brazil

Roberta Mounayer

Laboratório de Oceanografia Biológica
Centro de Educação Superior de Ciências Tecnológicas da Terra e do Mar
Universidade do Vale do Itajaí, Rua Uruguai, 458, CEP 88302-202, Itajaí – SC, Brazil

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Publicado

2009-06-20

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