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Effects of anthropogenic noise on the acoustic behaviour of Sotalia guianensis (Van Bénéden, 1864) in Pipa, North-eastern Brazil

  • Dalila T. Leão Martins (a1), Marcos R. Rossi-Santos (a1) (a2) and Flávio José De Lima Silva (a1) (a3)

Abstract

This study investigated the emission of subaquatic noise from recreational tourism motorboats, schooners and a sea-bottom mounted water pump. Analyses demonstrated alterations in several whistle (IF: t = 2.42, P = 0.015; FF: t = −2.22, P = 0.025) and calls patterns (MIF: t = −3.13, P = 0.001; MAF: t = −3.49, P = 0.0005; FD: t = −2.21, P = 0.027; D: t = 2.89, P = 0.004), caused primarily by motorboats. Duration of clicks was also modified (D: t = −3.85, P = 0.0001), mainly by the water pump. The frequency range of all noises (0.43–35.8 kHz) overlaps that used by dolphins (1–48 kHz), causing sound emissions changes, with a considerable increase in number of whistles and a reduction in clicks trains. These changes may be a strategy developed by these dolphins to overcome the noise band. Mitigation measures, such as boating regulations and environmental education for the local community, boaters and tourists are needed to conserve the species. The Guiana dolphin population is apparently already suffering, evidenced by diminished residence time and reduced number of individuals entering the inlet during the presence of pleasure craft.

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Corresponding author

Correspondence should be addressed to: D.T. Leão Martins, Programa de Pós Graduação em Psicobiologia, Departamento de Fisiologia, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, Natal, Rio Grande do Norte, Brazil email: dalilaleao@gmail.com

References

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Ananias, S.M.A., Jesus, A.H. and Yamamoto, M.E. (2008) Recorrência e fidelidade espacial do Boto-cinza Sotalia guianensis na enseada do Curral, Pipa/RN, avaliada através da foto-identificação. In Jesus, A.H., Medeiros, P.I.A.P. and Silva, F.J.L. (eds) Boto-cinza Sotalia guianensis. Mossoró, Brasil: Editora UERN, pp. 6168.
Au, W.W.L. (1993) The sonar of dolphins. New York, NY: Springer.
Au, W.W.L., Floyd, R.W. and Haun, J.E. (1978) Propagation of Atlantic bottlenose dolphin echolocation signals. Journal of the Acoustical Society of America 64, 411422.
Au, W.W.L. and Green, M. (2000) Acoustic interaction of humpback whales and whale-watching boats. Marine Environmental Research 49, 469481.
Au, W.W.L. and Hastings, M.C. (2008) Principles of marine bioacoustics. New York, NY: Springer.
Constantine, R. (2001) Increased avoidance of swimmers by wild bottlenose dolphins (Tursiops truncatus) due to long-term exposure to swim-with-dolphin tourism. Marine Mammal Science 17, 689702.
Constantine, R., Brunton, D.H. and Dennis, T. (2004) Dolphin-watching tour boats change bottlenose dolphin (Tursiops truncatus) behavior. Biological Conservation 117, 299307.
Corkeron, P.J. (1995) Humpback whales Megaptera novaeangliae in Hervey Bay, Queensland: behaviour and responses to whale-watching vessels. Canadian Journal of Zoology 73, 12901299.
Da Silva, V.M.F. and Best, R.C. (1996) Sotalia fluviatilis . Mammalian Species 527, 17.
Erbe, C. (2002) Underwater noise of whale-watching boats and potential effects on killer whales (Orcinus orca), based on an acoustic impact model. Marine Mammal Science 18, 394418.
Filla, G.F. and Monteiro-Filho, E.L.A. (2009) Monitoring tourism schooners observing estuarine dolphins (Sotalia guianensis) in the estuarine complex of Cananéia, south-east Brazil. Aquatic Conservation 19, 772778.
Flores, P.A.C. and Da Silva, V.M.F. (2009) Tucuxi and Guiana dolphin – Sotalia fluviatilis and S. guianensis . In Perrin, W.F., Würsig, B. and Thewissen, J.G.M. (eds) Encyclopedia of marine mammals. Amsterdam: Academic Press, pp. 11881191.
Foote, A.D., Osborne, R.W. and Hoelzel, A.R. (2004) Whale-call response to masking boat noise. Nature 428, 910.
Hildebrand, J.A. (2009) Anthropogenic and natural sources of ambient noise in the ocean. Marine Ecology Progress Series 395, 520.
IDEMA (2003) Relatório final dos estudos para implementação da ZEE dos estuaries do Rio Grande do Norte e seus entornos. Natal, Brazil: Instituto de Desenvolvimento e Econômico e Meio Ambiente do Rio Grande do Norte e sub-coordenadoria de gerenciamento costeiro.
Ketten, D.R. (1992) The cetacean ear: form, frequency and evolution. In Thomas, J., Kastelein, R. and Supin, A. (eds) Marine mammal sensory systems. New York, NY: Plenum Press, pp. 5375.
Lammers, M.O. and Au, W.W.L. (2003) Directionality in the whistles of Hawaiian spinner dolphins Stenella longirostris: a signal feature to cue direction of movement? Marine Mammal Science 19, 249264.
Link, L.O. (2000) Ocorrência , uso do habitat e fidelidade ao local do boto cinza, Sotalia fluviatilis guianensis, Gervais, 1853 (Mammalia: Cetacea), no litoral sul do Rio Grande do Norte. MSc dissertation. Universidade Federal do Rio Grande do Norte, Natal, Brasil.
Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (2001) Low frequency sounds emitted by Sotalia fluviatilis guianensis (Cetacea: Delphinidae) in an estuarine region in southeastern Brazil. Canadian Journal of Zoology 79, 5966.
Nascimento, L.F. (2006) Boto-cinza (Sotalia guianensis, Van Benédén, 1864) (Cetacea, Delphinidae): Atividade aérea, forrageio e interações inter-específicas, na Praia de Pipa (Tibau do Sul – RN) e estudo comparativo entre duas populações do Nordeste do Brasil . PhD thesis. Universidade Federal do Rio Grande do Norte, Natal, Brasil.
Ng, S.L. and Leung, S. (2003) Behavioral response of Indo-Pacific humpback dolphin (Sousa chinesis) to vessel traffic. Marine Environmental Research 56, 555567.
Nowacek, D.P., Thorne, L.H., Johnston, D.W. and Tyack, P.L. (2007) Responses of cetaceans to anthropogenic noise. Mammalian Review 37, 81115.
Parijs, S.M. and Corkeron, P.J. (2001) Boat traffic affects dolphin acoustic behavior. Journal of the Marine Biological Association of the United Kingdom 81, 533538.
Parks, S.E., Urazghildiiev, I. and Clark, C.W. (2009) Variability in ambient noise levels and call parameters of North Atlantic right whales in three habitat areas. Journal of the Acoustical Society of America 125, 12301239.
Paro, A.D. (2010) Estimativa populacional e uso do hábitat do Boto-cinza (Sotalia guianensis) no litoral sul do Rio Grande do Norte. Msc. dissertation. Universidade Federal do Rio Grande do Norte, Natal, Brasil.
Pavan, G. (2002) Effects of underwater noise on marine mammals. Accobams Bulletin 4, 1114.
Prideaux, M. (2003) Conserving cetaceans: the convention on migratory species and its relevant agreements for cetacean conservation. Munich: Whale and Dolphin Conservation Society (WDCS).
Richardson, W.J., Greene, C.R. Jr, Malme, C.I. and Thomson, D.H. (1995) Marine mammals and noise. New York, NY: Academic Press.
Rezende, F. (2008) Alterações acústico comportamentais. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do Boto-cinza. São Paulo: Páginas e Letras Editora e Gráfica, pp. 165176.
Rosas, F.C.W., Barreto, A.S. and Monteiro-Filho, E.L.A. (2003) Age and growth of the estuarine dolphin (Sotalia guianensis) (Cetacea, Delphinidae) on the Paraná coast, southern Brazil. Fishery Bulletin 101, 377383.
Rossing, T.D. (2007) Handbook of acoustics. New York, NY: Springer.
Rossi-Santos, M.R. (2015) Oil industry and noise pollution in the humpback whale (Megaptera novaeangliae) soundscape ecology of the southwestern Atlantic breeding ground. Journal of Coastal Research 31, 184195.
Santos, E. Jr, Pansard, K.C., Yamamoto, M.E. and Chellappa, S. (2006) Comportamento do boto-cinza, Sotalia guianensis (Van Bénédén) (Cetacea, Delphinidae) na presence de barcos de turismo na Praia de Pipa, Rio Grande do Norte, Brasil. Revista Brasileira de Zoologia 23, 661666.
Sauerland, M. and Dehnhardt, G. (1998) Underwater audiogram of a tucuxi (Sotalia fluviatilis guianensis). Journal of the Acoustical Society of America 103, 11991204.
Scarpaci, C., Bigger, S.W., Corkeron, P.J. and Nugegoda, D. (2001) Bottlenose dolphins (Tursiops truncatus) increase whistling in the presence of “swim-with dolphin” tour operation. Journal of Cetacean Research and Management 2, 183185.
Silveira, F.R.G. (2006) Variação diária e anual de frequência e atividade do boto cinza, Sotalia guianensis, em Pipa, nordeste do Brasil. MSc dissertation. Universidade Federal do Rio Grande do Norte, Natal, Brasil.
Stevens, M.A. and Boness, D.J. (2003) Influences of habitat features and human disturbance on use of breeding sites by a declining population of southern fur seals (Arctocephalus australis). Journal of Zoology 260, 145152.
Tosi, C.H. and Ferreira, R.G. (2008) Behavior of estuarine dolphin, Sotalia guianensis (Cetacea, Delphiidae), in controlled boat traffic situation at southern coast of Rio Grande do Norte, Brazil. Biodiversity and Conservation 18, 6778.
Tyack, P. (2000) Function aspects of cetacean communication. In Mann, J., Connor, R.C., Tyack, P. and Whitehead, H. (eds) Cetacean societies: field studies of dolphins and whales. Chicago, IL: University of Chicago Press, pp. 270307.
Wartzok, D., Altmann, J., Au, W., Ralls, K., Starfield, A. and Tyack, P. (2005) Marine mammal populations and ocean noise: determining when noise causes biologically significant effects. Washington, DC: The National Academic Press.
Wells, R.S., Hofmann, S. and Moors, T.L. (1998) Entanglement and mortality of bottlenose dolphins, Tursiops truncatus, in recreational fishing gear. Florida Fisheries Bulletin 96, 647650.
Wells, R.S. and Scott, M.D. (1997) Seasonal incidence of boat strikes on bottlenose dolphins near Sarasota, Florida. Marine Mammal Science 13, 475480.

Keywords

Effects of anthropogenic noise on the acoustic behaviour of Sotalia guianensis (Van Bénéden, 1864) in Pipa, North-eastern Brazil

  • Dalila T. Leão Martins (a1), Marcos R. Rossi-Santos (a1) (a2) and Flávio José De Lima Silva (a1) (a3)

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