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The ambient acoustic environment in Laguna San Ignacio, Baja California Sur, Mexico.
Seger, Kerri D; Thode, Aaron M; Swartz, Steven L; Urbán, Jorge R.
Afiliação
  • Seger KD; Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, Mail Code 0206, La Jolla, California 92093, USA.
  • Thode AM; Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, Mail Code 0206, La Jolla, California 92093, USA.
  • Swartz SL; Cetacean Research Association, 14700 Springfield Road, Darnestown, Maryland 20874, USA.
  • Urbán JR; Laboratorio de Mamiferos Marinos, Universidad Autónoma de Baja California Sur Carretera Sur, km 5.5, Apartado Postal 19-B, 23080, La Paz, Mexico.
J Acoust Soc Am ; 138(5): 3397-410, 2015 Nov.
Article em En | MEDLINE | ID: mdl-26627811
Each winter gray whales (Eschrichtius robustus) breed and calve in Laguna San Ignacio, Mexico, where a robust, yet regulated, whale-watching industry exists. Baseline acoustic environments in LSI's three zones were monitored between 2008 and 2013, in anticipation of a new road being paved that will potentially increase tourist activity to this relatively isolated location. These zones differ in levels of both gray whale usage and tourist activity. Ambient sound level distributions were computed in terms of percentiles of power spectral densities. While these distributions are consistent across years within each zone, inter-zone differences are substantial. The acoustic environment in the upper zone is dominated by snapping shrimp that display a crepuscular cycle. Snapping shrimp also affect the middle zone, but tourist boat transits contribute to noise distributions during daylight hours. The lower zone has three source contributors to its acoustic environment: snapping shrimp, boats, and croaker fish. As suggested from earlier studies, a 300 Hz noise minimum exists in both the middle and lower zones of the lagoon, but not in the upper zone.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Som / Baleias Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: J Acoust Soc Am Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Som / Baleias Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: J Acoust Soc Am Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos