This paper describes the high-frequency echolocation signals from free-ranging Yangtze finless porpoise in the Tian-e-zhou Baiji National Natural Reserve in Hubei Province, China. Signal analysis showed that the Yangtze finless porpoise clicks are typical high-frequency narrow-band (relative width of the frequency spectrum ultrasonic pulses. The peak frequencies of the typical clicks range from 87 to 145 kHz with an average of The durations range from 30 to 122 μs with an average of The characteristics of the signals are similar to those of other members of the Phocoenidae as well as the distantly related delphinids, Cephalorhynchus spp. Comparison of these signals to those of the baiji (Lipotes vexillifer), who occupies habitat similar to that of the Yangtze finless porpoise, showed that the peak frequencies of clicks produced by the Yangtze finless porpoise are remarkably higher than those produced by the baiji. Difference in peak frequency between the two species is probably linked to the different size of preferred prey fish. Clear double-pulse and multi-pulse reverberation structures of clicks are noticed, and there is no indication of any low-frequency components during the recording period.
REFERENCES
1.
Akamatsu
, T.
, Wang
, D.
, Nakamura
, K.
, and Wang
, K.
(1998
). “Echolocation range of captive and free-ranging baiji (Lipotes vexillifer), finless porpoise (Neophocaena phocaenoides), and bottlenose dolphin (Tursiops truncatus)
,” J. Acoust. Soc. Am.
104
, 2511
–2516
.2.
Arias
, C.
, and Ramos
, O. A.
(1997
). “Psychoacoustic tests for the study of human echolocation ability
,” Appl. Acoust.
51
, 399
–419
.3.
Au, W. W. L. (1993). The Sonar of Dolphins (Springer-Verlag, New York).
4.
Au
, W. W. L.
(1997
). “Echolocation in dolphins with a dolphin-bat comparison
,” Bioacoustics
8
, 137
–162
.5.
Au
, W. W. L.
, and Herzing
, D. L.
(2003
). “Echolocation signals of wild Atlantic spotted dolphin (Stenella frontalis)
,” J. Acoust. Soc. Am.
113
, 598
–604
.6.
Awbrey, F. T., Thomas, J. A., and Evans, W. E. (2003). “Ultrasonic underwater sounds from a captive Leopard seal (Hydrurga leptonyx),” in Echolocation in Bats and Dolphins, edited by J. Thomas, C. F. Moss, and M. Vater (Univ. of Chicago, Chicago), pp. 535–541.
7.
Awbrey, F. T., Norris, J. C., Hubbard, A. B., and Evans, W. E. (1979). “The bioacoustics of the Dall porpoise—salmon net interaction,” Hubbs-Sea World Research Institute Technical Report 79–120.
8.
Bradbury, J. W., and Vehrencamp, S. L. (1998). Principles of Animal Communication (Sinauer, Sunderland, MA).
9.
Chen, P., Liu, R., Wang, D., and Zhang, X. (1997). Biology, Rearing and Conservation of Baiji (Science, Baijing).
10.
Dubrovskii
, N. A.
, Krasnov
, P. S.
, and Titov
, A. A.
(1971
). “On the emission of echolocation-signals by the Azov sea harbor porpoise
,” Sov. Phys. Acoust.
16
, 444
–448
.11.
Dziedzic
, A.
, and De Buffrenil
, V.
(1989
). “Acoustic signals of the Commerson’s dolphin, Cephalorhynchus commersonii, in the Kerguelen Islands
,” J. Mammal.
70
, 449
–452
.12.
Evans, W. E., and Awbrey, F. T. (1988). “Natural history aspects of marine mammal echolocation: feeding strategies and habitat,” in Animal Sonar, Process and Performance, edited by P. E. Nachtigall and P. W. B. Moore (Plenum, New York), pp. 521–534.
13.
Fullard
, J. H.
, Barclay
, R. M. R.
, and Thomas
, D. W.
(1993
). “Echolocation in free-flying atiu swiftlets (Aerodramus sawtelli)
,” Biotropica
25
, 334
–339
.14.
Goold
, J. C.
, and Jefferson
, T. A.
(2002
). “Acoustic signals from free-ranging Finless porpoises (Neophocaena phocaenoides) in the waters around Hong Kong
,” Raffles Bull. Zool., Suppl.
10
, 131
–139
.15.
Herzing, D. L., and dos Santos, M. E. (2003). “Functional aspects of echolocation in dolphins,” in Echolocation in Bats and Dolphins, edited by J. Thomas, C. F. Moss and M. Vater (Univ. of Chicago, Chicago), pp. 386–393.
16.
Kamminga, C. (1988). “Echolocation signal types of odontocetes,” in Animal Sonar, Process and Performance, edited by P. E. Nachtigall and P. W. B. Moore (Plenum, New York), pp. 9–22.
17.
Kamminga
, C.
, and Wiersma
, H.
(1981
). “Investigations on Cetacean Sonar II. Acoustical similarities and differences in odontocete sonar signals
,” Aquat. Mamm.
8
, 41
–62
.18.
Kamminga
, C.
, and Wiersma
, H.
(1982
). “Investigations on Cetacean Sonar V. The true nature of the sonar sound of Cephalorhynchus commersonii
,” Aquat. Mamm.
9
, 95
–104
.19.
Kamminga
, C.
, Cohen Stuart
, A. B.
, and Silber
, G. K.
(1996
). “Investigations on cetacean sonar XI: Intrinsic comparison of the wave shapes of some members of the Phocoenidae family
,” Aquat. Mamm.
22
, 45
–55
.20.
Kamminga
, C.
, Kataoka
, T.
, and Engelsma
, F. J.
(1986
). “Investigations on cetacean sonar VII. Underwater sounds of Neophocaena phocaenoides of the Japanese coastal population
,” Aquat. Mamm.
12
, 52
–60
.21.
Kamminga
, C.
, Wiersma
, H.
, and Dudok van Heel
, W. H.
(1983
). “Sonar sounds in Orcaella brevirostris of the Mahakam River, East Kalimantan, Indonesia; the first descriptions of the acoustic behaviour
,” Aquat. Mamm.
10
, 83
–95
.22.
Kamminga
, C.
, Van Hove
, M. T.
, Engelsma
, F. J.
, and Terry
, R. P.
(1993
). “Investigations on Cetacean Sonar X: A comparative analysis of underwater echolocation clicks of Inia spp. And Sotalia spp.
,” Aquat. Mamm.
19
, 31
–43
.23.
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
,” J. Exp. Biol.
207
, 1811
–1823
.24.
Mizue
, K.
, Takemura
, A.
, and Nakasai
, K.
(1968
). “Studies on the little toothed whales in the west sea area of Kyusyu-XV. Underwater sound of the Chinese finless porpoise caught in the Japanese coastal sea
,” Bull. Faculty Fisheries, Nagasaki Univ.
25
, 25
–32
.25.
Møhl
, B.
, and Andersen
, S.
(1973
). “Echolocation: high frequency component in the click of the harbour porpoise (Phocoena phocoena L.)
,” J. Acoust. Soc. Am.
54
, 1368
–1373
.26.
Nakahara
, F.
, Takemura
, A.
, Koido
, T.
, and Hiruda
, H.
(1997
). “Target discrimination by an echolocating Finless porpoise, Neophocaena phocaenoides
,” Marine Mammal Sci.
133
, 639
–649
.27.
Nakamura, K., and Akamatsu, T. (2003). “Comparison of click characteristics among odontocete species,” in Echolocation in Bats and Dolphins, edited by J. Thomas, C. F. Moss, and M. Vater (Univ. of Chicago Press, Chicago), pp. 36–40.
28.
Norris, K. S., Evans, W. E., and Turner, R. N. (1966). “Echolocation in an Atlantic bottlenose porpoise during discrimination,” in Animal Sonar System, edited by R.-G. Busnel (Plenum, New York), Vol. I, pp. 409–447.
29.
Norris, K. S., Harvey, G. W., Burzell, L. A., and Krishna Kartha, T. D. (1972). “Sound production in the freshwater porpoises Sotalia cf fluviatilis GERVAIS and DEVILLE and Inia geoffrensis Blainville, in the Rio Negro, Brazil,” in Investigations on cetacean, edited by G. Pilleri, Bern, Vol. IV, pp. 251–262.
30.
Pilleri
, G.
, Zbinden
, K.
, and Kraus
, C.
(1980
). “Characteristics of the sonar system of cetaceans with pterygoschis. Directional properties of the sonar system of Neophocaena phocaenoides and Phocoena phocoena (Phocoenidae)
,” Invest. Cetacea.
11
, 157
–188
.31.
Poulter
, T. C.
, and Jennings
, R. A.
(1969
). “Sonar discrimination ability of the California sea lion, Zalophus californianus
,” Proc. California Acad. Sci.
36
, 381
–389
.32.
Renouf
, D.
, Galway
, G.
, and Gaborko
, L.
(1980
). “Evidence for echolocation in harbour seals
,” J. Mar. Biol. Assoc. U.K.
60
, 1039
–1042
.33.
Rice
, C. E.
, Felnstein
, S. H.
, and Schusterman
, R. J.
(1965
). “Echo detection ability of the blind: Size and distance factors
,” J. Exp. Psychol.
70
, 246
–251
.34.
Schotten, M., Au, W. W. L., Lammers, M. O., and Aubauer, R. (2003). “Echolocation recordings and localization of wild-spinner dolphins (Stenella longirostris) and pantropical spotted dolphins (Stenella attenuata) using a four hydrophone array,” in Echolocation in Bats and Dolphins, edited by J. Thomas, C. F. Moss, and M. Vater (Univ. of Chicago, Chicago), pp. 393–400.
35.
Silber
, G. K.
(1991
). “Acoustic signals of the Vaquita (Phocoena sinus)
,” Aquat. Mamm.
17
, 130
–133
.36.
Wang
, D.
(1996
). “A preliminary study on sound and acoustic behavior of the Yangtze River finless porpoise, Neophocaena phocaenoides
,” Acta Hydrobiol. Sinica.
20
, 127
–133
.37.
Wang, D., Liu, R., Zhang, X., Yang, J., Wei, Z., Zhao, Q., and Wang, X. (2000). “Status and conservation of the Yangtze finless porpoises,” in Biology and Conservation of Freshwater Cetaceans in Asia.Occas. Pap, edited by R. R. Reeves, B. D. Smith, and T. Kasuya, IUCN Spec. Surv. Commun. Vol. 23, pp. 81–85.
38.
Watkins
, W. A.
, and Schevill
, W. E.
(1980
). “Characteristic features of the underwater sounds of Cephalorhynchus commersonii
,” J. Mammal.
61
, 738
–740
.39.
Wei
, Z.
, Wang
, D.
, Kuang
, X.
, Wang
, K.
, Wang
, X.
, Xiao
, J.
, Zhao
, Q.
, and Zhang
, X.
(2002
). “Observations on behavior and ecology of the Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) group at Tian-e-Zhou oxbow of the Yangtze River
,” Raffles Bull. Zool., Suppl.
10
, 97
–103
.40.
Xiao, Y., and Jing, R. (1989). “Underwater acoustic signals of the baiji, Lipotes vexillifer,” in Biology and Conservation of the River Dolphin, edited by W. F. Perrin, R. L. Brownell, Jr., K. Zhou, and J. Liu, IUCN Spec. Surv. Commn. (Gland, Switzerland), pp. 129–136.
41.
Yang
, J.
, and Chen
, P.
(1996
). “Movement and behavior of finless porpoise (Neophocaena phocaenoides asiaeorientialis) at Swan oxbow, Hubei province
,” Acta Hydrobiol. Sinica.
20
, 32
–40
.42.
Zhang
, X.
, Wei
, Z.
, Wang
, X.
, Yang
, J.
, and Chen
, P.
(1995
). “Studies on the feasibility of establishment of a semi-natural reserve at Tian-e-Zhou (Swan) oxbow for baiji, Lipotes vexillifer
,” Acta Hydrobiol. Sinica.
19
, 110
–123
.
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