Peripheral neural coding strategies for spectral analysis and sound source location in the non-teleost bony fish, Acipenser fulvescens

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dc.contributor.advisorPopper, Arthur N.en_US
dc.contributor.advisorFay, Richard R.en_US
dc.contributor.authorMeyer, Michaelaen_US
dc.contributor.departmentBiologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2008-06-20T05:36:01Z
dc.date.available2008-06-20T05:36:01Z
dc.date.issued2008-04-26en_US
dc.description.abstractThis work is an investigation of coding strategies for spectral analysis and sound source location in Acipenser fulvescens, the lake sturgeon. A. fulvescens belongs to one of the few extant non-teleost ray-finned fishes. The sturgeon taxonomic family, the (Acipenseridae), has a phylogenetic history that dates back about 200 million years. Studies on sensory coding in any species of this family or any other non-teleost species have not been conducted before. Thus, this is the first study on peripheral coding strategies by the auditory system in a non-teleost bony fish. For this study, a shaker system, similar to that used in previous experiments on teleosts, was used to simulate particle motion of sound at the ears and auditory periphery of A. fulvescens. Simultaneously, electrophysiological recordings of isolated single units from the eighth nerve were obtained. Peripheral coding strategies for spectral analysis and sound source location in A. fulvescens resembled those found in teleosts. Frequency data resembled the characteristics found for auditory afferents (with preferences for lower frequencies) in land vertebrates. In addition, the auditory periphery in A. fulvescens appears to be well suited to encode the intensity of sound. In terms of mechanisms for sound source location, eighth nerve afferents responded to directional stimuli in a cosine-like manner (as in teleosts), which can generally serve as the basis for coding the location of a sound source. Certain differences to teleosts were also found in A. fulvescens and these may have implications for the mechanisms for sound source location in azimuth. The common physiological characteristics between A. fulvescens, teleosts, and land vertebrates may reflect important functions (that are part of the process of auditory scene analysis) of the auditory system that have been conserved throughout the evolution of vertebrates.en_US
dc.format.extent4143730 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/8147
dc.language.isoen_US
dc.subject.pqcontrolledBiology, Neuroscienceen_US
dc.subject.pqcontrolledBiology, Generalen_US
dc.subject.pqcontrolledBiology, Zoologyen_US
dc.subject.pquncontrolledNeural codingen_US
dc.subject.pquncontrolledearen_US
dc.subject.pquncontrolledhearingen_US
dc.subject.pquncontrolledevolutionen_US
dc.subject.pquncontrolledauditory scene analysisen_US
dc.subject.pquncontrolledbony fishen_US
dc.titlePeripheral neural coding strategies for spectral analysis and sound source location in the non-teleost bony fish, Acipenser fulvescensen_US
dc.typeDissertationen_US

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