Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout
Escape of salmon from sea cages is a problem that continues to plague the aquaculture industry. Data collected during the past 15 years from Norway, Scotland, Ireland, Canada and U.S. suggest significant impacts on natural runs of fish and economic losses to producers. The present report investigate...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:favs_facpubs-1119 2023-07-30T04:02:24+02:00 Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout Tlusty, Michael F. Andrew, Jennifer Baldwin, Kenneth Bradley, Terence M. 2008-01-31T08:00:00Z https://digitalcommons.uri.edu/favs_facpubs/118 https://doi.org/10.1016/j.aquaculture.2007.11.007 unknown DigitalCommons@URI https://digitalcommons.uri.edu/favs_facpubs/118 doi:10.1016/j.aquaculture.2007.11.007 https://doi.org/10.1016/j.aquaculture.2007.11.007 Fisheries, Animal and Veterinary Sciences Faculty Publications Acoustics Atlantic salmon Conditioning Escape Oncorhynchus mykiss Rainbow trout Recapture Salmo salar text 2008 ftunivrhodeislan https://doi.org/10.1016/j.aquaculture.2007.11.007 2023-07-17T18:49:40Z Escape of salmon from sea cages is a problem that continues to plague the aquaculture industry. Data collected during the past 15 years from Norway, Scotland, Ireland, Canada and U.S. suggest significant impacts on natural runs of fish and economic losses to producers. The present report investigated the feasibility of using acoustic conditioning as a means of recalling/recapturing escaped fish. Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) were found to respond to frequencies in the range of 50 - 400 Hz equally well. Subsequently, both species were conditioned to a 250 Hz acoustic tone during feeding. Juvenile and sub-adult fish readily conditioned to the acoustic signal within four days, with the maximum number of fish responding (85% salmon, 96% trout) by day seven. To assess retention of conditioning, fish were exposed to a single tone without feed reinforcement every one, two or four weeks. Salmon and trout continued to respond for a seven month period with no significant decrease (88% salmon, 97% trout) in response. No significant differences were observed in the response of either species to tones differing in frequency by up to 200 Hz (89% salmon, 96% trout) and intensity by 20 dB (91% salmon, 96% trout). Both species were reproducibly recalled to a cage or feeding ring in a 3.7 m tank, but were reluctant to re-enter the cage. The findings indicate that salmon and trout are readily conditioned to acoustic signals and retain that conditioning for an extended period of time without reinforcement. These characteristics suggest that acoustic conditioning has potential as a means to recall escaped salmon and when coupled with recapture, can reduce interactions with wild stocks and losses to the producer. © 2007 Elsevier B.V. All rights reserved. Text Atlantic salmon Salmo salar University of Rhode Island: DigitalCommons@URI Canada Norway Aquaculture 274 1 57 64 |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
topic |
Acoustics Atlantic salmon Conditioning Escape Oncorhynchus mykiss Rainbow trout Recapture Salmo salar |
spellingShingle |
Acoustics Atlantic salmon Conditioning Escape Oncorhynchus mykiss Rainbow trout Recapture Salmo salar Tlusty, Michael F. Andrew, Jennifer Baldwin, Kenneth Bradley, Terence M. Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
topic_facet |
Acoustics Atlantic salmon Conditioning Escape Oncorhynchus mykiss Rainbow trout Recapture Salmo salar |
description |
Escape of salmon from sea cages is a problem that continues to plague the aquaculture industry. Data collected during the past 15 years from Norway, Scotland, Ireland, Canada and U.S. suggest significant impacts on natural runs of fish and economic losses to producers. The present report investigated the feasibility of using acoustic conditioning as a means of recalling/recapturing escaped fish. Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) were found to respond to frequencies in the range of 50 - 400 Hz equally well. Subsequently, both species were conditioned to a 250 Hz acoustic tone during feeding. Juvenile and sub-adult fish readily conditioned to the acoustic signal within four days, with the maximum number of fish responding (85% salmon, 96% trout) by day seven. To assess retention of conditioning, fish were exposed to a single tone without feed reinforcement every one, two or four weeks. Salmon and trout continued to respond for a seven month period with no significant decrease (88% salmon, 97% trout) in response. No significant differences were observed in the response of either species to tones differing in frequency by up to 200 Hz (89% salmon, 96% trout) and intensity by 20 dB (91% salmon, 96% trout). Both species were reproducibly recalled to a cage or feeding ring in a 3.7 m tank, but were reluctant to re-enter the cage. The findings indicate that salmon and trout are readily conditioned to acoustic signals and retain that conditioning for an extended period of time without reinforcement. These characteristics suggest that acoustic conditioning has potential as a means to recall escaped salmon and when coupled with recapture, can reduce interactions with wild stocks and losses to the producer. © 2007 Elsevier B.V. All rights reserved. |
format |
Text |
author |
Tlusty, Michael F. Andrew, Jennifer Baldwin, Kenneth Bradley, Terence M. |
author_facet |
Tlusty, Michael F. Andrew, Jennifer Baldwin, Kenneth Bradley, Terence M. |
author_sort |
Tlusty, Michael F. |
title |
Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
title_short |
Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
title_full |
Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
title_fullStr |
Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
title_full_unstemmed |
Acoustic conditioning for recall/recapture of escaped Atlantic salmon and rainbow trout |
title_sort |
acoustic conditioning for recall/recapture of escaped atlantic salmon and rainbow trout |
publisher |
DigitalCommons@URI |
publishDate |
2008 |
url |
https://digitalcommons.uri.edu/favs_facpubs/118 https://doi.org/10.1016/j.aquaculture.2007.11.007 |
geographic |
Canada Norway |
geographic_facet |
Canada Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Fisheries, Animal and Veterinary Sciences Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/favs_facpubs/118 doi:10.1016/j.aquaculture.2007.11.007 https://doi.org/10.1016/j.aquaculture.2007.11.007 |
op_doi |
https://doi.org/10.1016/j.aquaculture.2007.11.007 |
container_title |
Aquaculture |
container_volume |
274 |
container_issue |
1 |
container_start_page |
57 |
op_container_end_page |
64 |
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1772813196009144320 |