Temporal resolution of the Florida manatee (<Emphasis Type="Italic">Trichechus manatus latirostris</Emphasis>) auditory system期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Temporal resolution of the Florida manatee (Trichechus manatus latirostris) auditory system

Authors:	David?A.?Mann author-information" > author-information__contact u-icon-before" > mailto:dmann@marine.usf.edu" title=" dmann@marine.usf.edu" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,Debborah?E.?Colbert,Joseph?C.?Gaspard,Brandon?M.?Casper,Mandy?L.?H.?Cook,Roger?L.?Reep,Gordon?B.?Bauer

Affiliation:	(1) College of Marine Science, University of South Florida, 140 7th Avenue South, St. Petersburg, FL 33701, USA;(2) Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, FL 34236, USA;(3) Department of Physiological Sciences and McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA;(4) Division of Social Sciences, New College of Florida, 5700 North Tamiami Trail, Sarasota, FL 34243, USA

Abstract:	Auditory evoked potential (AEP) measurements of two Florida manatees (Trichechus manatus latirostris) were measured in response to amplitude modulated tones. The AEP measurements showed weak responses to test stimuli from 4 kHz to 40 kHz. The manatee modulation rate transfer function (MRTF) is maximally sensitive to 150 and 600 Hz amplitude modulation (AM) rates. The 600 Hz AM rate is midway between the AM sensitivities of terrestrial mammals (chinchillas, gerbils, and humans) (80–150 Hz) and dolphins (1,000–1,200 Hz). Audiograms estimated from the input–output functions of the EPs greatly underestimate behavioral hearing thresholds measured in two other manatees. This underestimation is probably due to the electrodes being located several centimeters from the brain.

Keywords:	Manatee Hearing
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