Each winter gray whales (Eschrichtius robustus) breed and calve in Laguna San Ignacio, Mexico, where a robust, yet regulated, whale-watching industry exists. Baseline acoustic environments in LSI's three zones were monitored between 2008 and 2013, in anticipation of a new road being paved that will potentially increase tourist activity to this relatively isolated location. These zones differ in levels of both gray whale usage and tourist activity. Ambient sound level distributions were computed in terms of percentiles of power spectral densities. While these distributions are consistent across years within each zone, inter-zone differences are substantial. The acoustic environment in the upper zone is dominated by snapping shrimp that display a crepuscular cycle. Snapping shrimp also affect the middle zone, but tourist boat transits contribute to noise distributions during daylight hours. The lower zone has three source contributors to its acoustic environment: snapping shrimp, boats, and croaker fish. As suggested from earlier studies, a 300 Hz noise minimum exists in both the middle and lower zones of the lagoon, but not in the upper zone.
References
1.
Aalbers
, S. A.
, and Drawbridge
, M. A.
(2008
). “White seabass spawning behavior and sound production
,” T. Am. Fish. Soc.
137
, 542
–550
.2.
Batchelor
, H.
(2015
). (personal communication).5.
Crane
, N. C.
, and Lashkari
, K.
(1996
). “Sound production of gray whales, Eschrichtius robustus, along their migration route: A new approach to signal analysis
,” J. Acoust. Soc. Am.
100
(3
), 1878
–1886
.7.
Dahlheim
, M. E.
(1987
). “Bioacoustics of the gray whale (Eschrichtius robustus)
,” Ph. D. thesis, University of British Columbus
, Vancouver, BC, Canada
, p. 315
.6.
Dahlheim
, M. E.
, Fisher
, H. D.
, and Schempp
, J. D.
(1984
). “Sound production by the gray whale and ambient noise levels in Laguna San Ignacio, Baja California Sur, Mexico
,” in The Gray Whale, Eschrichtius robustus
, edited by M. L.
Jones
, S. L.
Swartz
, and S.
Leatherwood
(Academic Press
, Orlando, FL
), pp. 511
–541
.42.
D'Spain
, G. L.
, and Batchelor
, H. H.
(2006
). “Observations of biological choruses in the Southern California bight: A chorus at midfrequencies
,” J. Acoust. Soc. Am.
120
, 1942
–1955
.8.
Erbe
, C.
, Gavrilov
, A.
, and McCauley
, R.
(2013
). “Quantifying ocean noise and its spatiotemporal variability on Australia's Northwest Shelf
,” J. Acoust. Soc. Am.
134
, 4179
.9.
Everest
, F. A.
, Young
, R. W.
, and Johnson
, M. W.
(1948
). “Acoustical characteristics of noise produced by snapping shrimp
,” J. Acoust. Soc. Am.
20
(2
), 137
–142
.10.
Fish
, M. P.
(1964
). “Biological sources of sustained ambient sea noise
,” in Marine Bio-acoustics
, edited by W. N.
Tavolga
(Pergammon Press
, New York
), pp. 175
–194
.11.
Fish
, M. P.
, and Mowbray
, W.
(1970
). Sounds of Western North Atlantic Fishes
(Johns Hopkins Press
, Baltimore, MD
).12.
Fish
, J. F.
, Sumich
, J. L.
, and Lingle
, G. L.
(1974
). “Sounds produced by the gray whale, Eschrichtius robustus
,” Mar. Fish. Rev.
36
, 38
–45
.13.
Gonzáles-Carrillo
, S.
, Urbán
, R. J.
, and Swartz
, S. L.
(2006
). “Photographic identification and status of Eastern North Pacific gray whales (Eschrichtius robustus) in Laguna San Ignacio, Baja California Sur, Mexico during the 2005–2006 winter breeding season. Laguna San Ignacio Ecosystem Science Program 2006 Annual Report
,” www.lsiecosystem.org (Last viewed February 4, 2015).14.
Guerra
, M.
, Thode
, A. M.
, Grebner
, D.
, Ponce
, D.
, and Lopez
, A. I.
(2010
). “Summary report of acoustic measurements in San Ignacio Lagoon. Laguna San Ignacio Ecosystem Science Program 2010 Annual Report
,” www.lsiecosystem.org (Last viewed February 9, 2015).16.
Herzing
, D. L.
, and Mate
, B. R.
(1984
). “Gray Whale Migrations along the Oregon Coast, 1978–81
,” in The Gray Whale, Eschrichtius robustus
, edited by M. L.
Jones
, S. L.
Swartz
, and S.
Leatherwood
(Academic Press
, Orlando, FL
), pp. 289
–307
.17.
Holt
, M. M.
(2008
). “Sound exposure and Southern Resident killer whales (Orcinus orca): A review of current knowledge and data gaps
,” U.S. Dept. Commer., NOAA Tech. Memo. NMFS-NWFSC-89, 59
pp.18.
Johnson
, M. W.
(1948
). “Sound as a tool in marine ecology, from data on biological noises and the deep scattering layer
,” J. Mar. Res.
7
(3
), 443
–458
.19.
Jones
, M. L.
(1981
). “Lagoon bathymetry, benthic surveys, and productivity studies of Laguna San Ignacio Baja California Sur, Mexico
,” M. S. thesis, University of San Diego
, San Diego, CA
.21.
Jones
, M. L.
, and Swartz
, S. L.
(1984
). “Demography and phenology of gray whales and evaluation of whale-watching activities in Laguna San Ignacio, Baja California Sur, Mexico
,” in The Gray Whale, Eschrichtius robustus
, edited by M. L.
Jones
, S. L.
Swartz
, and S.
Leatherwood
(Academic Press
, Orlando, FL
), pp. 309
–374
.23.
Lammers
, M. O.
, Brainard
, R. E.
, Au
, W. W. L.
, Mooney
, T. A.
, and Wong
, K. B.
(2008
). “An ecological acoustic recorder (EAR) for long-term monitoring of biological and anthropogenic sounds on coral reefs and other marine habitats
,” J. Acoust. Soc. Am.
123
(3
), 1720
–1728
.25.
Luczkovich
, J. J.
, Pullinger
, R. C.
, Johnson
, S. E.
, and Sprague
, M. W.
(2008
). “Identifying Sciaenid critical spawning habitats by the use of passive acoustics
,” T. Am. Fish. Soc.
137
, 576
–605
.26.
Merchant
, N. D.
, Barton
, T. R.
, Thompson
, P. M.
, Pirotta
, E.
, Dakin
, D. T.
, and Corocicz
, J.
(2013
). “Spectral probability density as a tool for ambient noise analysis
,” J. Acoust. Soc. Am.
133
, EL262
–EL267
.27.
Moore
, S. E.
, and Ljungblad
, D. K.
(1984
). “Gray whales in the Beaufort, Chukchi, and Bering Seas: Distribution and sound production
,” in The Gray Whale, Eschrichtius robustus
, edited by M. L.
Jones
, S. L.
Swartz
, and S.
Leatherwood
(Academic
, New York
), pp. 543
–559
.28.
Norris
, K. S.
, Goodman
, R. M.
, Villa-Ramirez
, B.
, and Hobbs
, L.
(1977
). “Behavior of California gray whale, Eschrichtius robustus, in southern Baja California, Mexico
,” Fish. Bull.
75
(1
), 159
–172
.29.
Ollervides
, F.
, and Rorhkasse
, S.
(2007
). “Repertorio acústico de la ballena gris (Eschrichtius robustus) en Bahía Magdalena” (“Acoustic report of the gray whale (Eschrichtius robustus) in Baha Magdalena")
, in Estudios ecológicos en Bahía Magdalena
(Ecological Studies in Baha Magdalena) edited by R.
Funes-Rodríguez
, J.
Gómez-Gutiérrez
, and R.
Palomares-García
(CICIMAR-IPN
, La Paz, Baja California Sur, México
), pp. 263
–274
. http://www.guerreronegro.org/images/documentos/estudios_ecologicos_bahia_magdalena.pdf.43.
Perez Bastida
, M. V.
, and Ramirez Gallegos
, V. M.
(2015
). (personal communication).30.
Perryman
, W.
, and Weller
, D.
(2015
). (personal communication).31.
Ponce
, D.
, Thode
, A. M.
, Guerra
, M.
, Urban
J.
, and Swartz
, S.
(2012
). “Relationship between visual counts and call detection rates of gray whales (Eschrichtius robustus) in Laguna San Ignacio, Mexico
,” J. Acoust. Soc. Am.
131
(4
), 2700
–2713
.32.
Poole
, M. M.
(1984
). “Migration corridors of gray whales along the central California coast, 1980–82
,” in The Gray Whale, Eschrichtius robustus
, edited by M. L.
Jones
, S. L.
Swartz
, and S.
Leatherwood
(Academic Press
, Orlando, FL
), pp. 389
–407
.33.
Rice
, D. W.
, and Wolman
, A. A.
(1971
). “The life history and ecology of the gray whale (Eschrichtius robustus)
,” Special Publication Number 3 (American Society of Mammalogists), p. 142
.34.
Stafford
, K. M.
, Moore
, S. E.
, Spillane
, M.
, and Wiggins
, S.
(2007
). “Gray whale calls recorded near Barrow, Alaska, throughout the winter of 2003–04
,” Arctic
60
, 167
–172
.35.
Swartz
, S. L.
(1986
). “Gray whale migratory, social and breeding behavior
,” Report No. 8
Special Issue (International Whaling Commission), 207
–229
.36.
Swartz
, S. L.
(2014
). Lagoon Time: A Guide to Gray Whales and the Natural History of San Ignacio Lagoon
(The Ocean Foundation
, Washington, DC
), 216
pp.38.
Swartz
, S. L.
, and Urbán R
., J.
(2014
). “2014 Gray whale research report. Laguna San Ignacio Ecosystem Science Program 2014 Annual Report
,” www.lsiecosystem.org (Last viewed February 9, 2015).39.
Swartz
, S. L.
, Urbán R
., J.
, Gómez-Gallardo
, A.
, Martínez
, S.
, Olavarrieta
, T. G.
, Lopez
, D. C. A.
, Rodríguez
, L. J.
, Rodríguez
, M.
, and Rojas-Bracho
, L.
(2012
). “Numbers of Gray Whales (Eschrichtius robustus) utilizing Laguna San Ignacio, Baja California Sur, Mexico during the winter breeding seasons: 2007–2012, Laguna San Ignacio Ecosystem Science Program 2012 Annual Report
,” www.lsiecosystem.org (Last viewed February 9, 2015).40.
Urick
, R. J.
(1983
). Principles of Underwater Sound
(Peninsula Publishing
, Los Altos, CA
), 233
pp.41.
Wisdom
, S.
(2000
). “Development of sound production in the gray whale (Eschrichtius robustus)
,” M.S. thesis, University of San Diego
, San Diego, CA
.© 2015 Acoustical Society of America.
2015
Acoustical Society of America
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