Swimbladders under pressure: anatomical and acoustic responses by walleye pollock
<qd> Horne, J. K., Sawada, K., Abe, K., Kreisberg, R. B., Barbee, D. H., and Sadayasu, K. 2009. Swimbladders under pressure: anatomical and acoustic responses by walleye pollock. – ICES Journal of Marine Science, 66: 1162–1168. </qd>Pressure influences echo intensities from fish through...
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fthighwire:oai:open-archive.highwire.org:icesjms:66/6/1162 2023-05-15T18:32:52+02:00 Swimbladders under pressure: anatomical and acoustic responses by walleye pollock Horne, John K. Sawada, Kouichi Abe, Koki Kreisberg, Richard B. Barbee, David H. Sadayasu, Kazuhiro 2009-07-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1162 https://doi.org/10.1093/icesjms/fsp101 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1162 http://dx.doi.org/10.1093/icesjms/fsp101 Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2009 fthighwire https://doi.org/10.1093/icesjms/fsp101 2009-07-03T20:19:12Z <qd> Horne, J. K., Sawada, K., Abe, K., Kreisberg, R. B., Barbee, D. H., and Sadayasu, K. 2009. Swimbladders under pressure: anatomical and acoustic responses by walleye pollock. – ICES Journal of Marine Science, 66: 1162–1168. </qd>Pressure influences echo intensities from fish through changes in swimbladder volumes and surface areas. Volume reduction is expected to correspond to Boyle’s law (volume α pressure−1), but the effects of deforming the dorsal-aspect surface area of the swimbladder on the target strength ( TS ) of a physoclist have not been quantified at geometric scattering frequencies. Dorsal and lateral radiographs of three juvenile walleye pollock ( Theragra chalcogramma ) in a pressure chamber were used to image swimbladders from ambient to a maximum of 4.9 × 105 Pa (i.e. 5 atm). Radiographs from an additional 16 0-group, 21 juvenile, and 28 adult fish were used to compare swimbladder sizes and shapes across life-history stages. The directional elliptical eccentricity, which describes the relative compression in dorsal and lateral planes, was formulated to define swimbladder shapes and their variation. As pressure increased, dorsal-aspect surface areas of the swimbladder decreased at a constant rate. Swimbladder-volume reductions were similar among individuals, but less than those predicted by Boyle’s law. Compression was greatest in the dorsal–ventral plane and asymmetric anterior to posterior. The Kirchhoff-ray mode backscatter model predicted that TS at 38 and 120 kHz decreased by ∼4 dB as pressure increased from ambient to 4.9 × 105 Pa. Text Theragra chalcogramma HighWire Press (Stanford University) ICES Journal of Marine Science 66 6 1162 1168 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Horne, John K. Sawada, Kouichi Abe, Koki Kreisberg, Richard B. Barbee, David H. Sadayasu, Kazuhiro Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
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Articles |
description |
<qd> Horne, J. K., Sawada, K., Abe, K., Kreisberg, R. B., Barbee, D. H., and Sadayasu, K. 2009. Swimbladders under pressure: anatomical and acoustic responses by walleye pollock. – ICES Journal of Marine Science, 66: 1162–1168. </qd>Pressure influences echo intensities from fish through changes in swimbladder volumes and surface areas. Volume reduction is expected to correspond to Boyle’s law (volume α pressure−1), but the effects of deforming the dorsal-aspect surface area of the swimbladder on the target strength ( TS ) of a physoclist have not been quantified at geometric scattering frequencies. Dorsal and lateral radiographs of three juvenile walleye pollock ( Theragra chalcogramma ) in a pressure chamber were used to image swimbladders from ambient to a maximum of 4.9 × 105 Pa (i.e. 5 atm). Radiographs from an additional 16 0-group, 21 juvenile, and 28 adult fish were used to compare swimbladder sizes and shapes across life-history stages. The directional elliptical eccentricity, which describes the relative compression in dorsal and lateral planes, was formulated to define swimbladder shapes and their variation. As pressure increased, dorsal-aspect surface areas of the swimbladder decreased at a constant rate. Swimbladder-volume reductions were similar among individuals, but less than those predicted by Boyle’s law. Compression was greatest in the dorsal–ventral plane and asymmetric anterior to posterior. The Kirchhoff-ray mode backscatter model predicted that TS at 38 and 120 kHz decreased by ∼4 dB as pressure increased from ambient to 4.9 × 105 Pa. |
format |
Text |
author |
Horne, John K. Sawada, Kouichi Abe, Koki Kreisberg, Richard B. Barbee, David H. Sadayasu, Kazuhiro |
author_facet |
Horne, John K. Sawada, Kouichi Abe, Koki Kreisberg, Richard B. Barbee, David H. Sadayasu, Kazuhiro |
author_sort |
Horne, John K. |
title |
Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
title_short |
Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
title_full |
Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
title_fullStr |
Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
title_full_unstemmed |
Swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
title_sort |
swimbladders under pressure: anatomical and acoustic responses by walleye pollock |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1162 https://doi.org/10.1093/icesjms/fsp101 |
genre |
Theragra chalcogramma |
genre_facet |
Theragra chalcogramma |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1162 http://dx.doi.org/10.1093/icesjms/fsp101 |
op_rights |
Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsp101 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
6 |
container_start_page |
1162 |
op_container_end_page |
1168 |
_version_ |
1766217064457961472 |