In sperm whales (Physeter catodon L. 1758) the nose is vastly hypertrophied, accounting for about one-third of the length or weight of an adult male. Norris and Harvey [in Animal Orientation and Navigation, NASA SP-262 (1972), pp. 397–417] ascribed a sound-generating function to this organ complex. A sound generator weighing upward of 10 tons and with a cross-section of 1 m is expected to generate high-intensity, directional sounds. This prediction from the Norris and Harvey theory is not supported by published data for sperm whale clicks (source levels of 180 dB re 1 μPa and little, if any, directionality). Either the theory is not borne out or the data is not representative for the capabilities of the sound-generating mechanism. To increase the amount of relevant data, a five-hydrophone array, suspended from three platforms separated by 1 km and linked by radio, was deployed at the slope of the continental shelf off Andenes, Norway, in the summers of 1997 and 1998. With this system, source levels up to 223 dB re 1 μPa peRMS were recorded. Also, source level differences of 35 dB for the same click at different directions were seen, which are interpreted as evidence for high directionality. This implicates sonar as a possible function of the clicks. Thus, previously published properties of sperm whale clicks underestimate the capabilities of the sound generator and therefore cannot falsify the Norris and Harvey theory.

Topics
Bioacoustics of mammals, Hydrophone, Sonar, Aquatic ecology
1.
Au, W. W. L. (1993). The Sonar of Dolphins (Springer-Verlag, New York).
2.
Au
,
W. W. L.
,
Moore
,
P. W. B.
, and
Pawloski
,
D.
(
1986
). “
Echolocation transmitting beam of the Atlantic bottlenose dolphin
,”
J. Acoust. Soc. Am.
83
,
688
–
691
.
Google Scholar
 
3.
Au
,
W. W. L.
,
Penner
,
R. H.
, and
Turl
,
C. W.
(
1987
). “
Propagation of beluga echolocation signals
,”
J. Acoust. Soc. Am.
83
,
807
–
813
.
Google Scholar
 
4.
Au
,
W. W. L.
,
Floyd
,
R. W.
,
Penner
,
R. H.
, and
Murchison
,
A. E.
(
1974
). “
Measurements of echolocation signals of the Atlantic bottlenose dolphin, Tursiops truncatus Montagu, in open waters
,”
J. Acoust. Soc. Am.
56
,
1289
–
1290
.
Google Scholar
Crossref
Search ADS
 
5.
Backus, R., and Schevill, W. E. (1966). “Physeter clicks,” in Whales, Porpoises and Dolphins, edited by K. S. Norris (Univ. Calif.), pp. 510–528.
6.
Berzin, A. A. (1971). The Sperm Whale, Pacific Sci. Res. Inst. Fisheries Oceanogr., Trans. 1972 (Israel Program for Scientific Trans., no. 600707, Jerusalem).
7.
Dunn
,
J. L.
(
1969
). “
Airborne measurements of the acoustic characteristics of a sperm whale
,”
J. Acoust. Soc. Am.
46
,
1052
–
1054
.
Google Scholar
Crossref
Search ADS
 
8.
Goold
,
J. C.
, and
Jones
,
S. E.
(
1995
). “
Time and frequency domain characteristics of sperm whale clicks
,”
J. Acoust. Soc. Am.
98
,
1279
–
1291
.
Google Scholar
Crossref
Search ADS
PubMed
 
9.
Goold
,
J. C.
,
Bennell
,
J. D.
, and
Jones
,
S. E.
(
1996
). “
Sound velocity measurements in spermaceti oil under the combined influences of temperature and pressure
,”
Deep-Sea Res.
43
,
961
–
969
.
Google Scholar
Crossref
Search ADS
 
10.
Gordon
,
J. C. D.
(
1991
). “
Evaluation of a method for determining the length of sperm whales, Physeter catodon, from their vocalisations
,”
J. Zool. London
224
,
301
–
314
.
Google Scholar
Crossref
Search ADS
 
11.
Johannesen, O. M. (1986). “Brief overview of the physical oceanography,” in The Nordic Seas, edited by B. G. Hurdle (Springer-Verlag, New York), Chap. 4, pp. 105–126.
12.
Levenson
,
C.
(
1974
). “
Source level and bistatic target strength of the sperm whale (Physeter catodon) measured from an oceanic aircraft
,”
J. Acoust. Soc. Am.
55
,
1100
–
1103
.
Google Scholar
Crossref
Search ADS
 
13.
Madsen
,
P. T.
, and
Møhl
,
B.
(
2000
). “
Sperm whales (Physeter catodon L. 1758) do not react to sounds from detonators
,”
J. Acoust. Soc. Am.
107
,
668
–
671
.
Google Scholar
Crossref
Search ADS
PubMed
 
14.
Menne
,
D.
, and
Hackbarth
,
H.
(
1986
). “
Accuracy of distance measurement in the bat Eptesicus fuscus: Theoretical aspects and computer simulations
,”
J. Acoust. Soc. Am.
79
,
386
–
397
.
Google Scholar
Crossref
Search ADS
PubMed
 
15.
Møhl, B. (1988). “Target detection by echolocating bats,” in Animal Sonar, edited by P. E. Nachtigall and P. W. B. Moore (Plenum, New York), pp. 435–450.
16.
Møhl, B., Surlykke, A., and Miller L. A. (1990). “High intensity Narhwal clicks,” in Sensory Abilities of Cetaceans, edited by J. A. Thomas and R. A. Kastelein (Plenum, New York), pp. 295–304.
17.
Nishiwaki, N., Oshumi, S., and Maeda Y. (1963). “Changes of form in the sperm whale accompanied with growth,” Sci. Rept. Whales Res. Inst., Tokyo, Vol. 17, 1–13.
18.
Norris, K. S., and Harvey, G. W. (1972). “A theory for the function of the spermaceti organ of the sperm whale (Physeter catodon L.),” in Animal Orientation and Navigation, edited by S. R. Galler (NASA SP-262), pp. 397–417.
19.
Norris
,
K. S.
, and
Møhl
,
B.
(
1983
). “
Can Odontocetes debilitate prey with sound?
,”
Am. Nat.
122
,
85
–
104
.
Google Scholar
Crossref
Search ADS
 
20.
Norris
,
K. S.
,
Prescott
,
J. H.
,
Asa-Dorian
,
P. V.
, and
Perkins
,
P.
(
1961
). “
An experimental demonstration of echolocation behaviour in the porpoise, Tursiops truncatus (Montagu)
,”
Biol. Bull.
120
,
163
–
176
.
Google Scholar
Crossref
Search ADS
 
21.
Raven
,
H. C.
, and
Gregory
,
W. K.
(
1933
). “
The spermaceti organ and nasal passages of the sperm whale (Physeter catodon) and other Odontocetes
,”
Am. Mus. Novitates
677
,
1
–
17
.
Google Scholar
 
22.
Taylor, J. R. (1997). An Introduction to Error Analysis. The Study of Uncertainties in Physical Measurements, 2nd. ed. (University Science Books, Sausalito, CA), pp. 73–76.
23.
Thiele, L., and Oedegaard, J. (1983). “Underwater noise from the propellers of a triple screw container ship,” Report no. 82.54, Oedan, Greenland Fisheries Investigations, Copenhagen, Denmark.
24.
Urick, R. J. (1983). Principles of Underwater Sound, 3rd ed. (McGraw–Hill, New York).
25.
Wahlberg
,
M.
(
1999a
). “
Positioning accuracy of a large-aperture array for sperm whale research
,”
J. Acoust. Soc. Am.
105
,
1318
abstract.
Google Scholar
Crossref
Search ADS
 
26.
Wahlberg, M. (1999b). “Estimating source position accuracy in acoustic localization of marine mammals,” Masters thesis, Dept. of Physics, Gothenburg University, Sweden, 63 pp.
27.
Watkins, W. A. (1980). “Sperm whale clicks,” in Animal Sonar Systems, edited by R.-G. Busnel and J. F. Fish (Plenum, New York), pp. 283–290.
28.
Watkins, W. A., and Schevill W. E. (1971). “Four hydrophone array for acoustic three-dimensional location,” Woods Hole Oceanographic Institution Tech. Rep. No. 71-60, Woods Hole, MA.
29.
Weber, P. J. (1963). “The tape recorder as an instrumentation device,” Ampex Corporation.
30.
Weilgart
,
L. S.
, and
Whitehead
,
H.
(
1988
). “
Distinctive vocalizations from mature male sperm whales (Physeter macrocephalus)
,”
Can. J. Zool.
66
,
1931
–
1937
.
Google Scholar
Crossref
Search ADS
 
31.
Whitney, W. (1968). “Observations of Sperm Whale Sounds from great depths,” MPL-U-11/68, Marine Physical Laboratory, Scripps Institution of Oceanography, 8 pp.
32.
Zagaesky
,
M.
(
1987
). “
Some observations on the debilitation hypothesis
,”
Marine Mammal Science
3
,
275
–
278
.
Google Scholar
Crossref
Search ADS
 
33.
Zar, J. H. (1996). Biostatistical Analysis (Prentice–Hall, Englewood Cliffs, NJ), 3rd ed., pp. 327–330.
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