{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T11:11:56Z","timestamp":1790766716533,"version":"4.1.0"},"reference-count":34,"publisher":"Acoustical Society of America (ASA)","issue":"4","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2006,10,1]]},"abstract":"<jats:p>The Florida manatee is regularly exposed to high volumes of vessel traffic and other human-related noise because of its coastal distribution. Quantifying specific aspects of the manatee\u2019s acoustic environment will allow for a better understanding of how these animals respond to both natural and human-induced changes in their environment. Transmission loss measurements were made in 24 sampling sites that were chosen based on the frequency of manatee presence. The Monterey-Miami Parabolic Equation model was used to relate environmental parameters to transmission loss in two extremely shallow water environments: seagrass beds and dredged habitats. Model accuracy was verified by field tests at all modeled sites. Results indicated that high-use grassbeds have higher levels of transmission loss for frequencies above 2kHz compared to low-use sites of equal food species composition and density. This also happens to be the range of most efficient sound propagation inside the grassbed habitat and includes the dominant frequencies of manatee vocalizations. The acoustic environment may play a more important role in manatee grassbed selection than seagrass coverage or species composition, as linear regression analysis showed no significant correlation between usage and either total grass coverage, individual species coverage, or aerial pattern.<\/jats:p>","DOI":"10.1121\/1.2258832","type":"journal-article","created":{"date-parts":[[2006,10,9]],"date-time":"2006-10-09T15:28:31Z","timestamp":1160407711000},"page":"2320-2327","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":25,"title":["Transmission loss in manatee habitats"],"prefix":"10.1121","volume":"120","author":[{"given":"Jennifer L.","family":"Miksis-Olds","sequence":"first","affiliation":[{"name":"University of Rhode Island Graduate School of Oceanography, , Narragansett, Rhode Island 02882"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James H.","family":"Miller","sequence":"additional","affiliation":[{"name":"University of Rhode Island Department of Ocean Engineering and Graduate School of Oceanography, , Narragansett, Rhode Island 02882"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023080404572474800_c1","first-page":"1974","year":"1995"},{"key":"2023080404572474800_c1a","first-page":"1186","article-title":"Estimating food consumption of free-ranging manatees in Florida","volume-title":"Journal of Wildlife Management","year":"1983"},{"key":"2023080404572474800_c2","doi-asserted-by":"crossref","first-page":"2523","DOI":"10.1121\/1.415767","article-title":"Interference patterns of frequency dependent transmission loss for shallow-water propagation","volume":"99","year":"1996","journal-title":"J. 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(1998). \u201cThe effect of nitrate fertilization and shading on physiological and mechanical properties of eelgrass (Zostera marina),\u201d Ph.D. dissertation, University of Rhode Island, Narragansett."},{"key":"2023080404572474800_c17","first-page":"63","year":"1995"},{"key":"2023080404572474800_c18","unstructured":"Miksis-Olds, J. L. (2006). \u201cManatee response to environmental noise,\u201d Ph.D. dissertation, University of Rhode Island, Narragansett., 248 pp."},{"key":"2023080404572474800_c19","year":"2001"},{"issue":"1","key":"2023080404572474800_c20","doi-asserted-by":"publisher","first-page":"66","DOI":"10.1121\/1.1582862","article-title":"Intraspecific and geographic variation of West Indian manatee (Trichechus manatus spp.) vocalizations (L)","volume":"114","year":"2003","journal-title":"J. Acoust. Soc. 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