Influence of resonance-driven bubble clouds on fine-scale behaviour of common carp (Cyprinus carpio)
Influence of resonance-driven bubble clouds on fine-scale behaviour of common carp (Cyprinus carpio)
Acoustic-bubble barriers show potential as a management tool for fish passage. Although greater efforts are now being made to better understand the fundamentals that underpin reactions of fish to such barriers, the phenomenon of bubble coalescence has not yet been considered. When introducing air underwater smaller bubbles coalesce with successor bubbles at the orifice so that without vibration the bubble which enters the liquid is large. Orifice diameter has historically been used as a measure of bubble size, however as detachment and fragmentation occur unpredictably this method is unreliable, indicating insufficient control over the stimulus generated. This study used lower air flows (6 l min−1 m−1) and haptic feedback motors to vibrate the injection nozzles and reduce coalescence. Greater uniformity in bubble size allowed matching of the bubble population to a sound field to which the bubbles were resonant. In a proof-of-concept study, fish response to two resonant acoustic-bubble barriers was tested and compared to two non-resonant acoustic-bubble walls. The scattering and absorption coefficients for all segments of the bubble population were calculated to determine the most important bubble sizes for attenuation. Analysis of fish movement and orientation was used to examine fish behaviour in relation to the sound fields generated.
Flores Martin, Nicholas
9f9f0ddd-bb25-4d45-ae04-7989f32704f7
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Kemp, Paul
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Flores Martin, Nicholas
9f9f0ddd-bb25-4d45-ae04-7989f32704f7
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Kemp, Paul
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Flores Martin, Nicholas, Leighton, Timothy, White, Paul and Kemp, Paul
(2019)
Influence of resonance-driven bubble clouds on fine-scale behaviour of common carp (Cyprinus carpio).
The Journal of The Acoustical Society of America, 146 (4), [2897].
(doi:10.1121/1.5137053).
Abstract
Acoustic-bubble barriers show potential as a management tool for fish passage. Although greater efforts are now being made to better understand the fundamentals that underpin reactions of fish to such barriers, the phenomenon of bubble coalescence has not yet been considered. When introducing air underwater smaller bubbles coalesce with successor bubbles at the orifice so that without vibration the bubble which enters the liquid is large. Orifice diameter has historically been used as a measure of bubble size, however as detachment and fragmentation occur unpredictably this method is unreliable, indicating insufficient control over the stimulus generated. This study used lower air flows (6 l min−1 m−1) and haptic feedback motors to vibrate the injection nozzles and reduce coalescence. Greater uniformity in bubble size allowed matching of the bubble population to a sound field to which the bubbles were resonant. In a proof-of-concept study, fish response to two resonant acoustic-bubble barriers was tested and compared to two non-resonant acoustic-bubble walls. The scattering and absorption coefficients for all segments of the bubble population were calculated to determine the most important bubble sizes for attenuation. Analysis of fish movement and orientation was used to examine fish behaviour in relation to the sound fields generated.
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e-pub ahead of print date: 13 November 2019
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Local EPrints ID: 444644
URI: http://eprints.soton.ac.uk/id/eprint/444644
ISSN: 0001-4966
PURE UUID: 1381cd6f-c18a-4187-8ffe-74f413cc62b1
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Date deposited: 28 Oct 2020 17:31
Last modified: 17 Mar 2024 03:00
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