{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T15:05:26Z","timestamp":1775142326917,"version":"3.50.1"},"reference-count":67,"publisher":"Acoustical Society of America (ASA)","issue":"4","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,10,1]]},"abstract":"<jats:p>The Indian Ocean and Atlantic bottlenose dolphins (Tursiops aduncus and Tursiops truncatus) are among the best studied echolocating toothed whales. However, almost all echolocation studies on bottlenose dolphins have been made with captive animals, and the echolocation signals of free-ranging animals have not been quantified. Here, biosonar source parameters from wild T. aduncus and T. truncatus were measured with linear three- and four-hydrophone arrays in four geographic locations. The two species had similar source parameters, with source levels of 177\u2013228 dB re 1 \u03bcPa peak to peak, click durations of 8\u201372 \u03bcs, centroid frequencies of 33\u2013109 kHz and rms bandwidths between 23 and 54 kHz. T. aduncus clicks had a higher frequency emphasis than T. truncatus. The transmission directionality index was up to 3 dB higher for T. aduncus (29 dB) as compared to T. truncatus (26 dB). The high directionality of T. aduncus does not appear to be only a physical consequence of a higher frequency emphasis in clicks, but may also be caused by differences in the internal properties of the sound production system.<\/jats:p>","DOI":"10.1121\/1.3624822","type":"journal-article","created":{"date-parts":[[2011,10,3]],"date-time":"2011-10-03T23:27:13Z","timestamp":1317684433000},"page":"2263-2274","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":98,"title":["Source parameters of echolocation clicks from wild bottlenose dolphins (<i>Tursiops aduncus<\/i>and<i>Tursiops truncatus<\/i>)"],"prefix":"10.1121","volume":"130","author":[{"given":"Magnus","family":"Wahlberg","sequence":"first","affiliation":[{"name":"University of Southern Denmark Fjord & B\u00e6lt and Marine Research Laboratory, , Margrethes Plads 1, 5300 Kerteminde, Denmark"}]},{"given":"Frants H.","family":"Jensen","sequence":"additional","affiliation":[{"name":"Aarhus University Zoophysiology, Department of Bioscience, , C. F. M\u00f8llers Alle Building 1131, 8000 \u00c5rhus C, Denmark"}]},{"given":"Natacha","family":"Aguilar Soto","sequence":"additional","affiliation":[{"name":"Louisiana Laguna University BIOECOMAC, Department of Animal Biology, , Tenerife, Canary Islands, Spain"}]},{"given":"Kristian","family":"Beedholm","sequence":"additional","affiliation":[{"name":"Aarhus University Zoophysiology, Department of Bioscience, , C. F. M\u00f8llers Alle Building 1131, 8000 \u00c5rhus C, Denmark"}]},{"given":"Lars","family":"Bejder","sequence":"additional","affiliation":[{"name":"Murdoch University Cetacean Research Unit, Centre for Fish, Fisheries and Aquatic Ecosystem Research, , 6150 Murdoch, Australia"}]},{"given":"Cl\u00e1udia","family":"Oliveira","sequence":"additional","affiliation":[{"name":"University of the Azores Department of Oceanography and Fisheries, , Cais de Santa Cruz, 9901-862 Horta, Portugal"}]},{"given":"Marianne","family":"Rasmussen","sequence":"additional","affiliation":[{"name":"University of Iceland H\u00fasav\u00edk Research Center, , Hafnarst\u00e9tt 3, 640 H\u00fasav\u00edk, Iceland"}]},{"given":"Malene","family":"Simon","sequence":"additional","affiliation":[{"name":"Greenland Institute of Natural Resources , P.O. Box 570, 3900 Nuuk, Greenland . Sea Watch Foundation Welsh Office, Paragon House, Wellington Place, New Quay, SA45 9NR, United Kingdom"}]},{"given":"Anne","family":"Villadsgaard","sequence":"additional","affiliation":[{"name":"University of Southern Denmark Fjord & B\u00e6lt and Marine Research Laboratory, , Margrethes Plads 1, 5300 Kerteminde, Denmark"}]},{"given":"Peter T.","family":"Madsen","sequence":"additional","affiliation":[{"name":"Aarhus University Zoophysiology, Department of Bioscience, , C. F. M\u00f8llers Alle, Building 1131, 8000 \u00c5rhus C, Denmark"}]}],"member":"231","published-online":{"date-parts":[[2011,10,3]]},"reference":[{"issue":"5","key":"2023071901122048000_c1","doi-asserted-by":"publisher","first-page":"2539","DOI":"10.1121\/1.404424","article-title":"Computer modelling of acoustic beam formation in Delphinus delphis","volume":"92","year":"1992","journal-title":"J. Acoust. Soc. 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