title: Temporal signal processing of dolphin biosonar echoes from salmon prey.
abstract: Killer whales project short broadband biosonar clicks. The broadband nature of the clicks provides good temporal resolution of echo highlights and allows for the discriminations of salmon prey. The echoes contain many highlights as the signals reflect off different surfaces and parts of the fish body and swim bladder. The temporal characteristics of echoes from salmon are highly aspect dependent and six temporal parameters were used in a support vector machine to discriminate between species. Results suggest that killer whales can classify salmon based on their echoes and provide some insight as to which features might enable the classification.
authors.affiliation: Marine Mammal Research Program, Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1106, Kaneohe, Hawaii 96734 wau@hawaii.edu, ou@hawaii.edu.
authors.forename: Whitlow W L
authors.initials: WW
authors.lastname: Au
authors.affiliation: Marine Mammal Research Program, Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1106, Kaneohe, Hawaii 96734 wau@hawaii.edu, ou@hawaii.edu.
authors.forename: Hui Helen
authors.initials: HH
authors.lastname: Ou
mesh_terms: D000400:Air Sacs / Q000502:physiology; D000465:Algorithms; D000818:Animals; D001307:Auditory Perception; D003198:Computer Simulation; D003463:Cues; D004455:Echolocation; D005247:Feeding Behavior; D005518:Food Preferences; D009038:Motion; D010363:Pattern Recognition, Automated; D046709:Pattern Recognition, Physiological; D011235:Predatory Behavior; D012474:Salmon / Q000145:classification / Q000502:physiology*; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D060388:Support Vector Machine; D013997:Time Factors; D013998:Time Perception; D050685:Whale, Killer / Q000502:physiology / Q000523:psychology*