acta ethologica

, Volume 19, Issue 1, pp 61–68 | Cite as

Day and night sounds of the Guiana dolphin, Sotalia guianensis (Cetacea: Delphinidae) in southeastern Brazil

  • Lucimary S. Deconto
  • Emygdio L. A. Monteiro-Filho
Original Paper

Abstract

Many cetaceans are known to be acoustically active at night. However, for most dolphin species, there is little information about their nocturnal acoustic activities. To study the acoustic repertoire of Sotalia guianensis, diurnal and nocturnal sounds (whistles, burst pulses, low-frequency narrowband (LFN) sounds, and clicks) were identified in the Cananéia estuary (25° 01′ S–25° 13′ S/47° 52′ W–48° 06′ W), south of the state of São Paulo, southeastern Brazil, during April, June, and November of 2012. The emission rate of these sounds was compared between daytime and nighttime using the chi-squared statistical test. The mean values of the acoustic parameters of whistles, burst pulses, LFN sounds, and clicks were compared using the t test. Whistles, burst pulses, and LFN sounds were more frequent at night, as these individuals require greater acoustic communication in the absence of light, mainly for social communication. Echolocation emission rates were similar in both day and nighttime. Dolphin sound structure also varied throughout the day, with dolphins emitting lower-frequency sounds at night. Low-frequency sounds, with longer wavelengths, provide many advantages for dolphins active at night because such sounds propagate greater distances. This study demonstrates that the sounds produced by S. guianensis are dependent on the time of day, with social communication sounds being more influenced by the presence of light.

Keywords

Whistles Clicks Burst pulses Low-frequency narrowband Bioacoustics Diel 

References

  1. Akamatsu T, Teilmann J, Miller LA, Tougaard J, Dietz R et al (2007) Comparison of echolocation behaviour between coastal and riverine porpoises. Deep-Sea Res Part II 54:290–297. doi:10.1016/j.dsr2.2006.11.006 CrossRefGoogle Scholar
  2. Atem ACG, Monteiro-Filho ELA (2006) Nocturnal activity of the estuarine dolphin (Sotalia guianensis) in the region of Cananéia, São Paulo State, Brazil. Aquat Mamm 32:236–241. doi:10.1578/AM.32.2.2006.236 CrossRefGoogle Scholar
  3. Au WWL, Giorli G, Chen J, Copeland A, Lammers M et al (2013) Nighttime foraging by deep diving echolocating odontocetes off the Hawaiian islands of Kauai and Ni’ihau as determined by passive acoustic monitors. J Acoust Soc Am 133:3119–3127. doi:10.1121/1.4798360 CrossRefPubMedGoogle Scholar
  4. Azevedo AF, Simão SM (2002) Whistles produced by marine tucuxi dolphins (Sotalia fluviatilis) in Guanabara Bay, southeasthern Brazil. Aquat Mamm 28:261–266Google Scholar
  5. Azevedo AF, van Sluys M (2005) Whistles of tucuxi dolphins (Sotalia fluviatilis) in Brazil: comparisons among populations. J Acoust Soc Am 117:1456–1464. doi:10.1121/1.1859232 CrossRefPubMedGoogle Scholar
  6. Baird RW, Borsani JF, Hanson MB, Tyack PL (2002) Diving and night-time behavior of long-finned pilot whales in the Ligurian Sea. Mar Ecol Prog Ser 237:301–305. doi:10.3354/meps237301 CrossRefGoogle Scholar
  7. Benoit-Bird KJ, Wursig B, Mfadden CJ (2004) Dusky dolphin (Lagenorhynchus obscurus) foraging in two different habitats: active acoustic detection of dolphins and their prey. Mar Mamm Sci 20:215–231. doi:10.1111/j.1748-7692.2004.tb01152.x CrossRefGoogle Scholar
  8. Carlström J (2005) Diel variation in echolocation behavior of wild harbor porpoises. Mar Mamm Sci 2:1–12. doi:10.1111/j.1748-7692.2005.tb01204.x CrossRefGoogle Scholar
  9. Cox TM, Read AJ, Solow A, Tregenza N (2001) Will harbour porpoises (Phocoena phocoena) habituate to pingers? J Cetacean Res Manage 3:81–86Google Scholar
  10. Deconto LS, Monteiro-Filho ELA (2013) High initial and minimum frequencies of Sotalia guianensis whistles in the southeast and south of Brazil. J Acoust Soc Am 134:3899–3904. doi:10.1121/1.4823845 CrossRefPubMedGoogle Scholar
  11. Erber C, Simão SM (2004) Analysis of whistles produced by the tucuxi dolphin Sotalia fluviatilis from Sepetiba Bay, Brazil. An Acad Bras Cienc 76:381–385. doi:10.1590/S0001-37652004000200029 CrossRefPubMedGoogle Scholar
  12. Figueiredo LD, Simão SM (2009) Possible occurrence of signature whistles in a population of Sotalia guianensis (Cetacea, Delphinidae) living in Sepetiba Bay, Brazil. J Acoust Soc Am 126:1563–1569. doi:10.1121/1.3158822 CrossRefGoogle Scholar
  13. Gridley T, Nastasi A, Kriesell HJ, Elwen SH (2015) The acoustic repertoire of wild common bottlenose dolphins (Tursiops truncatus) in Walvis Bay, Namibia. Bioacoustics 24:153–174. doi:10.1080/09524622.2015.1014851 CrossRefGoogle Scholar
  14. Hanke W, Dehnhardt G (2013) Sensory biology of aquatic mammals. J Comp Physiol A 199:417–420. doi:10.1007/s00359-013-0823-9 CrossRefGoogle Scholar
  15. Havukainen L, Monteiro ELA, Filla GF (2011) Population density of Sotalia guianensis (Cetacea: Delphinidae) in the Cananéia region, southeastern Brazil. Rev Biol Trop 59:1275–1284PubMedGoogle Scholar
  16. Kamminga C, van Hove MT, Engelsma FJ, Terry RP (1993) Investigations on cetacean sonar X: a comparative analysis of underwater echolocation of Inia spp. and Sotalia spp. Aquat Mamm 19:31–43Google Scholar
  17. Kyhn LA, Tougaard J, Thomas L, Duve LR, Stenback J, Amundin M, Desportes G, Teilmann J (2012) From echolocation clicks to animal density—acoustic sampling of harbor porpoises with static dataloggers. J Acoust Soc Am 131:550–560. doi:10.1121/1.3662070 CrossRefPubMedGoogle Scholar
  18. Lammers MO, Au WWL (2003) Directionality in the whistles of Hawaiian spinner dolphins (Stenella longirostris): a signal feature to cue direction of movement? Mar Mamm Sci 19:249–264. doi:10.1111/j.1748-7692.2003.tb01107.x CrossRefGoogle Scholar
  19. Levin LA, Boesch DF, Covich A, Dahm C, Erséus C, Ewel KC (2001) The function of marine critical transition zones and the importance of sediment biodiversity. Ecosystems 4:430–451. doi:10.1007/s10021-001-0021-4 CrossRefGoogle Scholar
  20. Madsen CJ, Herman LM (1980) Social and ecological correlates of cetacean vision and visual appearance. In: Herman LM (ed) Cetacean behavior: mechanisms and functions. Wiley Interscience, New York, NY, pp 101–147Google Scholar
  21. Marques TA, Thomas L, Munger L, Wiggins S, Hildebrand JA (2011) Estimating North Pacific right whale (Eubalaena japonica) density using passive acoustic cue counting. Endanger Species Res 13:163–172. doi:10.3354/esr00325 CrossRefGoogle Scholar
  22. May-Collado LJ, Wartzok D (2008) A comparison of bottlenose dolphin whistles in the Atlantic Ocean: factors promoting whistle variation. J Mammal 89:1229–1240. doi:10.1644/07- MAMM-A-310.1 CrossRefGoogle Scholar
  23. May-Collado LJ, Wartzok D (2009) A characterization of Guyana dolphin (Sotalia guianensis) whistles from Costa Rica: the importance of broadband recording systems. J Acoust Soc Am 125:1202–1213. doi:10.1121/1.3058631 CrossRefPubMedGoogle Scholar
  24. May-Collado LJ, Wartzok D (2010) Sounds produced by the tucuxi (Sotalia fluviatilis) from the Napo and Aguarico rivers of Ecuador. Lat Am J Aquat Mamm 8:131–136. doi:10.5597/lajam00162 CrossRefGoogle Scholar
  25. Monteiro-Filho ELA, Monteiro KDKA (2001) Sounds of Sotalia fluviatilis guianensis (Cetacea: Delphinidae) in an estuarine region in southeastern Brazil. Can J Zool 79:59–66. doi:10.1139/z00-166 CrossRefGoogle Scholar
  26. Nemiroff L, Whitehead H (2009) Structural characteristics of pulsed calls of long-finned pilot whales Globicephala melas. Bioacoustics 19:67–92CrossRefGoogle Scholar
  27. Newman K, Springer AM (2008) Nocturnal activity by mammal-eating killer whales at a predation hot spot in the Bering Sea. Mar Mamm Sci 24:990–999. doi:10.1111/j.1748-7692.2008.00236.x Google Scholar
  28. Pivari D, Rosso S (2005) Whistles of small groups of Sotalia fluviatilis during foraging behavior in southern Brazil. J Acoust Soc Am 118:2725–2731. doi:10.1121/1.2033569 CrossRefPubMedGoogle Scholar
  29. Rossi-Santos MR, Podos J (2006) Latitudinal variation in whistle structure of the estuarine dolphin Sotalia guianensis. Behaviour 143:347–364. doi:10.1163/156853906775897905 CrossRefGoogle Scholar
  30. Sauerland M, Dehnhardt G (1998) Underwater audiogram of a tucuxi (Sotalia fluviatilis guianensis). J Acoust Soc Am 103:1199–1204. doi:10.1121/1.421228 CrossRefPubMedGoogle Scholar
  31. Scott MD, Chivers SJ (2009) Movements and diving behavior of pelagic spotted dolphins. Mar Mamm Sci 25:137–160. doi:10.1111/j.1748-7692.2008.00236.x CrossRefGoogle Scholar
  32. Simard P, Lace N, Gowans S, Quintana-Rizzo E, Kuczaj SA II, Wells RS, Mann DA (2011) Low frequency narrow-band calls in bottlenose dolphins (Tursiops truncatus): signal properties, function, and conservation implications. J Acoust Soc Am 130:30683076. doi:10.1121/1.3641442 CrossRefGoogle Scholar
  33. UNESCO (2012) United Nations Educational, Scientific and Cultural Organization. http://www.unesco.org. Accessed 11 June 2012
  34. Watkins WA (1967) Harmonic interval: fact or artifact in spectral analysis of pulse trains. In: Tavolga WN (ed) Marine bio-acoustics. Pergamon Press, Oxford, pp 15–42Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg and ISPA 2015

Authors and Affiliations

  • Lucimary S. Deconto
    • 1
    • 2
    • 3
  • Emygdio L. A. Monteiro-Filho
    • 3
    • 4
  1. 1.Programa de Pós-Graduação em Sistemas Costeiros e Oceânicos do Centro de Estudos do Mar, Setor de Ciências da TerraUniversidade Federal do ParanáPontal do ParanáBrasil
  2. 2.Programa de Pós-Graduação em Zoologia, Departamento de Zoologia, Setor de Ciências Biológicas, Centro PolitécnicoUniversidade Federal do ParanáCuritibaBrasil
  3. 3.Instituto de Pesquisas CananéiaCananéiaBrasil
  4. 4.Departamento de Zoologia, Setor de Ciências Biológicas, Centro PolitécnicoUniversidade Federal do ParanáCuritibaBrasil

Personalised recommendations