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Apparent source level of free-ranging humpback dolphin, Sousa chinensis, in the South China Sea

Published online by Cambridge University Press:  04 March 2014

Satoko Kimura ,
Tomonari Akamatsu ,
Liang Fang ,
Zhitao Wang ,
Kexiong Wang ,
Ding Wang  and
Ken Yoda
Satoko Kimura*
Affiliation:
Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
Tomonari Akamatsu
Affiliation:
National Research Institute of Fisheries Engineering, Fisheries Research Agency, Hasaki, Kamisu, Ibaraki 314-0408, Japan Japan Science and Technology Agency, CREST, Gobancho, Chiyoda-ku, Tokyo 102-0075, Japan
Liang Fang
Affiliation:
The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Zhitao Wang
Affiliation:
The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Kexiong Wang
Affiliation:
The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Ding Wang
Affiliation:
The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Ken Yoda
Affiliation:
Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
*
Correspondence should be addressed to:S. Kimura, Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan email: s.kimura@nagoya-u.jp
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Abstract

The acoustic performance and behaviour of free-ranging cetaceans requires investigation under natural conditions to understand how wild animals use sound. This is also useful to develop quantitative evaluation techniques for passive acoustic monitoring. There have been limited studies on the acoustics of the Indo-Pacific humpback dolphin; nevertheless, this species is of particular concern because of the anthropogenic activity in the coastal habitats. In the present study, we used a four-hydrophone array to estimate the apparent source levels (ASLs) of biosonar sequences (click trains), of this species in San-Niang Bay, China. As the dolphins approached the array, 173 click trains were found to meet the criteria of on-axis sounds produced within 60 m of the equipment. In total, 121 unclipped click trains were used for the ASL estimation. The qualified click trains contained 36.3 ± 32.5 clicks, lasting for 1.5 ± 1.5 s, with average inter-click intervals (ICIs) of 51.2 ± 38.3 ms. Average ICIs showed a bimodal distribution, with a cut-off at 20 ms. Short-range click trains, with short ICIs of <20 ms on average, were characterized by smaller ASLs, relatively stable ICIs and a shorter click train duration. The mean back-calculated ASL for humpback dolphins with an approximately maximum body size of 2.5 m was 181.7 ± 7.0 dB re 1 μPa at a distance of 1.6–57.2 m. This value was comparable to that recorded for other dolphins of similar body size, although the ASL estimates obtained in this study might be conservative.

Keywords

odontoceteecholocation signalclick trainbuzzinter-click intervaladjustment
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 96 , Issue 4: Marine Mammals , June 2016 , pp. 845 - 851
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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References

REFERENCES

Akamatsu, T., Wang, D., Wang, K., Li, S. and Dong, S. (2010) Scanning sonar of rolling porpoises during prey capture dives. Journal of Experimental Biology 213, 146–152.Google Scholar
Au, W.W.L. and Benoit-Bird, K.J. (2003) Automatic gain control in the echolocation system of dolphins. Nature 423, 861–863.Google Scholar
Branstetter, B.K., Moore, P.W., Finneran, J.J., Tormey, M.N. and Aihara, H. (2012) Directional properties of bottlenose dolphin (Tursiops truncatus) clicks, burst-pulse, and whistle sounds. Journal of the Acoustical Society of America 131, 1613–1621.Google Scholar
Brumm, H. (2004) The impact of environmental noise on song amplitude in a territorial bird. Journal of Animal Ecology 73, 434–440.Google Scholar
Chen, B., Zheng, D., Yang, G., Xu, X. and Zhou, K. (2009) Distribution and conservation of the Indo–Pacific humpback dolphin in China. Integrative Zoology 4, 240–247.Google Scholar
Connaughton, M.A., Taylor, M.H. and Fine, M.L. (2000) Effects of fish size and temperature on weak fish disturbance calls: implications for the mechanism of sound generation. Journal of Experimental Biology 203, 1503–1512.Google Scholar
DeRuiter, S.L., Bahr, A., Blanchet, M.A., Hansen, S.F., Kristensen, J.H., Madsen, P.T., Tyack, P.L., Wahlberg, M. (2009) Acoustic behaviour of echolocating porpoises during prey capture. Journal of Experimental Biology 212, 3100–3107.Google Scholar
DeRuiter, S.L., Hansen, M., Koopman, H.N., Westgate, A.J., Tyack, P.L. and Madsen, P.T. (2010) Propagation of narrow-band-high-frequency clicks: measured and modeled transmission loss of porpoise-like clicks in porpoise habitats. Journal of the Acoustical Society of America 127, 560–567.Google Scholar
Frere, C.H., Seddon, J., Palmer, C., Porter, L. and Parra, G.J. (2011) Multiple lines of evidence for an Australasian geographic boundary in the Indo-Pacific humpback dolphin (Sousa chinensis): population or species divergence? Conservation Genetics 12, 633–1638.CrossRefGoogle Scholar
Goold, J.C. and Jefferson, T.A. (2004) A note on clicks recorded from free-ranging Indo-Pacific humpback dolphins, Sousa chinensis. Aquatic Mammals 30, 175–178.CrossRefGoogle Scholar
Imaizumi, T., Furusawa, M., Akamatsu, T. and Nishimori, Y. (2008) Measurement of target strength spectrum of fish using sonar signals of dolphin. Journal of the Acoustical Society of America. 124, 3440–3449.Google Scholar
Jefferson, T.A. and Hung, S.K. (2004) A review of the status of the Indo-Pacific humpback dolphin (Sousa chinensis) in Chinese Waters. Aquatic Mammals 30, 149–158.Google Scholar
Jefferson, T.A. and Van Waerebeek, K. (2004) Geographic variation in skull morphology of humpback dolphins (Sousa spp.). Aquatic Mammals 30, 3–17.Google Scholar
Jefferson, T.A., Hung, S.K., Robertson, K.M. and Archer, F.I. (2012) Life history of the Indo-Pacific humpback dolphin in the Pearl River Estuary, southern China. Marine Mammal Science 28, 84–104.Google Scholar
Jensen, F.H., Bejder, L., Wahlberg, M. and Madsen, P.T. (2009) Biosonar adjustments to target range of echolocating bottlenose dolphins (Tursiops sp.) in the wild. Journal of Experimental Biology 212, 1078–1086.Google Scholar
Jones, G. and Sayigh, L.S. (2002) Geographical variation in rates of vocal production of free-ranging bottlenose dolphins. Marine Mammal Science 18, 374–393.Google Scholar
Kimura, S., Akamatsu, T., Li, S., Dong, S., Dong, L., Wang, K., Wang, D. and Arai, N. (2010) Density estimation of Yangtze finless porpoises using passive acoustic sensors and automated click train detection. Journal of the Acoustical Society of America 128, 1435–1445.CrossRefGoogle ScholarPubMed
Kimura, S., Akamatsu, T., Wang, D., Li, S., Wang, K. and Yoda, K. (2013) Variation in the production rate of biosonar signals in freshwater porpoises. Journal of the Acoustical Society of America 133, 3128–3134.Google Scholar
Kyhn, L.A., Tougaard, J., Jensen, F., Wahlberg, M., Stone, G., Yoshinaga, A., Beedholm, K. and Madsen, P.T. (2009) Feeding at a high pitch: Source parameters of narrow band, high-frequency clicks from echolocating off-shore hourglass dolphins and coastal Hector's dolphins. Journal of the Acoustical Society of America 125, 1783–1791.Google Scholar
Kyhn, L.A., Jensen, F.H., Beedholm, K., Tougaard, J., Hansen, M. and Madsen, P.T. (2010) Echolocation in sympatric Peale's dolphins (Lagenorhynchus australis) and Commerson's dolphins (Cephalorhynchus commersonii) producing narrow-band high-frequency clicks. Journal of Experimental Biology 213, 1940–1949.Google Scholar
Li, S., Wang, D., Wang, K. and Akamatsu, T. (2006) Sonar gain control in echolocating finless porpoises (Neophocaena phocaenoides) in an open water. Journal of the Acoustical Society of America 120, 1803–1806.Google Scholar
Li, S., Akamatsu, T., Wang, D. and Wang, K. (2009) Localization and tracking of phonating finless porpoises using towed stereo acoustic data-loggers. Journal of the Acoustical Society of America 126, 468–475.CrossRefGoogle ScholarPubMed
Li, S., Wang, D., Wang, K., Taylor, E.A., Cros, E., Shi, W., Wang, Z., Fang, L., Chen, Y. and Kong, F. (2012) Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis). Journal of Experimental Biology 215, 3055–3063.Google Scholar
Li, S., Wang, D., Wang, K., Hoffmann-Kuhnt, M., Fernando, N., Taylor, E. A., Lin, W., Chen, J., and Ng, T. (2013) Possible age-related hearing loss (presbycusis) and corresponding change in echolocation parameters in a stranded Indo-Pacific humpback dolphin. Journal of Experimental Biology 216, 4144–4153.Google Scholar
Madsen, P.T., Kerr, I. and Payne, R. (2004) Echolocation clicks of two free-ranging, oceanic delphinids with different food preferences: false killer whales Pseudorca crassidens and Risso's dolphins Grampus griseus. Journal of Experimental Biology 207, 1811–1823.Google Scholar
Madsen, P.T. and Wahlberg, M. (2007) Recording and quantification of ultrasonic echolocation clicks from free-ranging toothed whales. Deep-Sea Research Part I: Oceanographic Research Papers 54, 1421–1444.Google Scholar
Mellinger, D.K., Stafford, K.M., Moore, S.E., Dziak, R.P. and Matsumoto, H. (2007) An overview of fixed passive acoustic observation methods for cetaceans. Oceanography 20, 36–45.Google Scholar
Møhl, B., Wahlberg, M., Madsen, P.T., Miller, L.A. and Surlykke, A. (2000) Sperm whale clicks: directionality and source level revisited. Journal of the Acoustical Society of America 107, 638–648.Google Scholar
Møhl, B., Wahlberg, M., Madsen, P.T., Heerfordt, A., Lund, A. (2003) The monopulsed nature of sperm whale clicks. Journal of the Acoustical Society of America 114, 1143–1154.Google Scholar
Morisaka, T., Karczmarsk, L., Akamatsu, T., Sakai, M., Thornton, M. (2011) Echolocation signals of Heaviside's dolphins (Cephalorhynchus heavisidii). Journal of the Acoustical Society of America 129, 449–457.CrossRefGoogle ScholarPubMed
Rasmussen, M.H. and Miller, L.A. (2002) Whistles and clicks from white-beaked dolphins, Lagenorhynchus albirostris recorded in Faxafloi Bay. Aquatic Mammals 28, 78–89.Google Scholar
Rasmussen, M.H., Akamatsu, T., Teilmann, J., Vikingsson, G. and Miller, L.A. (2013) Biosonar, diving and movements of two tagged white-beaked dolphin in Icelandic waters. Deep-Sea Research II 88/89, 97–105.Google Scholar
Sims, P.Q., Vaughn, R., Hung, S.K. and Würsig, B. (2011) Sounds of Indo-Pacific humpback dolphins (Sousa chinensis) in west Hong Kong: a preliminary description. Journal of the Acoustical Society of America 131, EL48–EL53.Google Scholar
Slater, G.J., Price, S.A., Santini, F. and Alfaro, M.E. (2010) Diversity versus disparity and the radiation of modern cetaceans. Proceedings of the Royal Society B: Biological Sciences, 277, 3097–3104.Google Scholar
Urick, R.J. (1983) Principles of underwater sound. 3rd edition. Englewood Cliffs, NJ: Prentice-Hall.Google Scholar
Van Parijs, S.M. and Corkeron, P.J. (2001) Vocalizations and behaviour of Pacific humpback dolphins, Sousa chinensis. Ethology 107, 701–716.Google Scholar
Verfuss, U., Schnitzler, H.U. and Miller, L.A. (2009) Echolocation by two foraging harbour porpoises (Phocoean phocoena). Journal of Experimental Biology 212, 823–834.Google Scholar
Villadsgaard, A., Wahlberg, M. and Tougaard, J. (2007) Echolocation signals of wild harbour porpoises, Phocoena phocoena. Journal of Experimental Biology 210, 56–64.Google Scholar
Wahlberg, M., Jensen, F.H., Aguilar Soto, N., Beedholm, K., Bejder, L., Oliveira, C., Rasmussen, M., Simon, M., Villadsgaard, A. and Madsen, P.T. (2011) Source parameters of echolocation clicks from wild bottlenose dolphins (Tursiops aduncus and Tursiops truncatus). Journal of the Acoustical Society of America 130, 2263–2274.Google Scholar
Wisniewska, D.A., Johnson, M., Beedholm, K., Wahlberg, M. and Madsen, P.T. (2012) Acoustic gaze adjustments during active target selection in echolocating porpoises. Journal of Experimental Biology 215, 4358–4373.Google Scholar
Xu, X., Zhang, Z., Ma, L., Li, P., Yang, G. and Zhou, K. (2012) Site fidelity and association patterns of Indo-Pacific humpback dolphins off the east coast of Zhanjiang, China. Acta Theriologica 5, 99–109.Google Scholar