Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises
The target strength as a function of aspect angle were measured for four species of fish using dolphin-like and porpoise-like echolocation signals. The polar diagram of target strength values measured from an energy flux density perspective showed considerably less fluctuation with azimuth than woul...
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ftoregonstate:ir.library.oregonstate.edu:ws859m297 2024-09-15T17:55:32+00:00 Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises Au, Whitlow W. L. Benoit-Bird, Kelly J. Kastelein, Ronald A. College of Oceanic and Atmospheric Sciences https://ir.library.oregonstate.edu/concern/articles/ws859m297 English [eng] eng unknown Acoustical Society of America https://ir.library.oregonstate.edu/concern/articles/ws859m297 Copyright Not Evaluated Article ftoregonstate 2024-07-22T18:06:06Z The target strength as a function of aspect angle were measured for four species of fish using dolphin-like and porpoise-like echolocation signals. The polar diagram of target strength values measured from an energy flux density perspective showed considerably less fluctuation with azimuth than would a pure tone pulse. Using detection range data obtained from dolphin and porpoise echolocation experiments, the detection ranges for the Atlantic cod by echolocating dolphins and porpoises were calculated for three aspect angles of the cod. Maximum detection ranges occurred when the fish was broadside to the odontocete and minimum detection ranges occurred when the cod was in the tail aspect. Maximum and minimum detection ranges for the bottlenose dolphin in a noise-limited environment was calculated to be 93 and 70 m, respectively. In a quiet environment, maximum and minimum detection ranges for the bottlenose dolphin were calculated to be 173 and 107 m, respectively. The detection ranges for the harbor porpoise in a quiet environment were calculated to be between 15 and 27 m. The primary reason for the large differences in detection ranges between both species was attributed to the 36 dB higher source level of the bottlenose dolphin echolocation signals. Keywords: bioacoustics, mechanoception, acoustic signal detection, biocommunications Article in Journal/Newspaper atlantic cod ScholarsArchive@OSU (Oregon State University) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
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English unknown |
description |
The target strength as a function of aspect angle were measured for four species of fish using dolphin-like and porpoise-like echolocation signals. The polar diagram of target strength values measured from an energy flux density perspective showed considerably less fluctuation with azimuth than would a pure tone pulse. Using detection range data obtained from dolphin and porpoise echolocation experiments, the detection ranges for the Atlantic cod by echolocating dolphins and porpoises were calculated for three aspect angles of the cod. Maximum detection ranges occurred when the fish was broadside to the odontocete and minimum detection ranges occurred when the cod was in the tail aspect. Maximum and minimum detection ranges for the bottlenose dolphin in a noise-limited environment was calculated to be 93 and 70 m, respectively. In a quiet environment, maximum and minimum detection ranges for the bottlenose dolphin were calculated to be 173 and 107 m, respectively. The detection ranges for the harbor porpoise in a quiet environment were calculated to be between 15 and 27 m. The primary reason for the large differences in detection ranges between both species was attributed to the 36 dB higher source level of the bottlenose dolphin echolocation signals. Keywords: bioacoustics, mechanoception, acoustic signal detection, biocommunications |
author2 |
College of Oceanic and Atmospheric Sciences |
format |
Article in Journal/Newspaper |
author |
Au, Whitlow W. L. Benoit-Bird, Kelly J. Kastelein, Ronald A. |
spellingShingle |
Au, Whitlow W. L. Benoit-Bird, Kelly J. Kastelein, Ronald A. Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
author_facet |
Au, Whitlow W. L. Benoit-Bird, Kelly J. Kastelein, Ronald A. |
author_sort |
Au, Whitlow W. L. |
title |
Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
title_short |
Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
title_full |
Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
title_fullStr |
Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
title_full_unstemmed |
Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
title_sort |
modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises |
publisher |
Acoustical Society of America |
url |
https://ir.library.oregonstate.edu/concern/articles/ws859m297 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/ws859m297 |
op_rights |
Copyright Not Evaluated |
_version_ |
1810431803045969920 |