Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae
Psychophysical techniques were employed to measure the sensitivity of the vibrissae of a harbour seal (Phoca vitulina) to sinusoidal vibrations ranging between 100 and 2500 hertz. A control test ensured that the seal was not responding to auditory or other extraneous components of the signal. Vibrat...
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Memorial University of Newfoundland
1984
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ftmemorialuniv:oai:research.library.mun.ca:4220 2023-10-01T03:56:29+02:00 Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae Mills, Frederick H.J.(Frederick Herbert Jewer) 1984 application/pdf https://research.library.mun.ca/4220/ https://research.library.mun.ca/4220/1/Mills_HerbertFrederickJ.pdf https://research.library.mun.ca/4220/3/Mills_HerbertFrederickJ.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/4220/1/Mills_HerbertFrederickJ.pdf https://research.library.mun.ca/4220/3/Mills_HerbertFrederickJ.pdf Mills, Frederick H.J.(Frederick Herbert Jewer) <https://research.library.mun.ca/view/creator_az/Mills=3AFrederick_H=2EJ=2E=28Frederick_Herbert_Jewer=29=3A=3A.html> (1984) Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1984 ftmemorialuniv 2023-09-03T06:44:57Z Psychophysical techniques were employed to measure the sensitivity of the vibrissae of a harbour seal (Phoca vitulina) to sinusoidal vibrations ranging between 100 and 2500 hertz. A control test ensured that the seal was not responding to auditory or other extraneous components of the signal. Vibration detection thresholds were found to decrease with increased frequency up to 1000 hertz and remain relatively constant thereafter. These data were used for evaluation of some previous hypotheses of vibrissae function. Calculations revealed that seals should be able to use their vibrissae to detect objects such as swimming fish vibrating underwater at close range and tactually discriminate between objects (like fish with different scale patterns). Also, vibrissae could theoretically detect underwater sounds produced by fish, but at too close a range to have any practical value. Thesis harbour seal Phoca vitulina Memorial University of Newfoundland: Research Repository |
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Memorial University of Newfoundland: Research Repository |
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ftmemorialuniv |
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English |
description |
Psychophysical techniques were employed to measure the sensitivity of the vibrissae of a harbour seal (Phoca vitulina) to sinusoidal vibrations ranging between 100 and 2500 hertz. A control test ensured that the seal was not responding to auditory or other extraneous components of the signal. Vibration detection thresholds were found to decrease with increased frequency up to 1000 hertz and remain relatively constant thereafter. These data were used for evaluation of some previous hypotheses of vibrissae function. Calculations revealed that seals should be able to use their vibrissae to detect objects such as swimming fish vibrating underwater at close range and tactually discriminate between objects (like fish with different scale patterns). Also, vibrissae could theoretically detect underwater sounds produced by fish, but at too close a range to have any practical value. |
format |
Thesis |
author |
Mills, Frederick H.J.(Frederick Herbert Jewer) |
spellingShingle |
Mills, Frederick H.J.(Frederick Herbert Jewer) Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
author_facet |
Mills, Frederick H.J.(Frederick Herbert Jewer) |
author_sort |
Mills, Frederick H.J.(Frederick Herbert Jewer) |
title |
Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
title_short |
Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
title_full |
Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
title_fullStr |
Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
title_full_unstemmed |
Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae |
title_sort |
determination of the vibration sensitivity of harbour seal (phoca vitulina) vibrissae |
publisher |
Memorial University of Newfoundland |
publishDate |
1984 |
url |
https://research.library.mun.ca/4220/ https://research.library.mun.ca/4220/1/Mills_HerbertFrederickJ.pdf https://research.library.mun.ca/4220/3/Mills_HerbertFrederickJ.pdf |
genre |
harbour seal Phoca vitulina |
genre_facet |
harbour seal Phoca vitulina |
op_relation |
https://research.library.mun.ca/4220/1/Mills_HerbertFrederickJ.pdf https://research.library.mun.ca/4220/3/Mills_HerbertFrederickJ.pdf Mills, Frederick H.J.(Frederick Herbert Jewer) <https://research.library.mun.ca/view/creator_az/Mills=3AFrederick_H=2EJ=2E=28Frederick_Herbert_Jewer=29=3A=3A.html> (1984) Determination of the vibration sensitivity of harbour seal (Phoca vitulina) vibrissae. Masters thesis, Memorial University of Newfoundland. |
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1778526358238920704 |