Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds
The maximum sustained swimming speeds ( U ms ) for large (0.45 m long) and small (0.15 m) Atlantic salmon were respectively 0.91ms-1 and 0.54ms-1. Video and cin6 films of fish swimming close to U ms were analysed to obtain variables required for the application of two hydrodynamic models, those of L...
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1992
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fthighwire:oai:open-archive.highwire.org:jexbio:166/1/33 2023-05-15T15:31:54+02:00 Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds TANG, J. WARDLE, C. S. 1992-05-01 00:00:00.0 text/html http://jeb.biologists.org/cgi/content/short/166/1/33 en eng Company of Biologists http://jeb.biologists.org/cgi/content/short/166/1/33 Copyright (C) 1992, Company of Biologists Journal Articles TEXT 1992 fthighwire 2013-05-27T05:53:17Z The maximum sustained swimming speeds ( U ms ) for large (0.45 m long) and small (0.15 m) Atlantic salmon were respectively 0.91ms-1 and 0.54ms-1. Video and cin6 films of fish swimming close to U ms were analysed to obtain variables required for the application of two hydrodynamic models, those of Lighthill and Yates, to determine the mean thrust ( T ) and mean power output ( P ) at these swimming speeds ( U ) close to U ms . A large fish (Salmon) and a small fish (Smolt) were selected for analysis. For salmon using Lighthill's model, T =0.30N and P =0.26W, and using Yates' model, T =0.28N and P =0.25W ( U /=0.87ms-1=0.96 U ms ). For smolt using Lighthill's model, T =0.0052N and P =0.0019W, and using Yates' model, T =0.0065 N and P =0.0024W ( U =0.37ms-1=0.69 U ms ). The power output for smolt swimming at 0.69 U ms was corrected to that required to swim at U ms , giving P =0.0059W (Lighthill's model) and P =0.0074W (Yates' model). At U ms it was assumed that all the red muscle was used. Two fish were selected from each size group and cross-sectioned to estimate their red muscle masses. Using a maximum mass-specific power output of 5–8 W kg- for slow red muscle fibres allowed us to calculate that the large and small fish have a power output capacity of 0.125–0.3 W and 0.007–0.019 W, respectively. The power output values at U ms derived from the different approaches for the large (0.25–0.26 W) and small (0.0059–0.0074 W) salmon agree closely. Effects of scaling are discussed. Text Atlantic salmon Salmo salar HighWire Press (Stanford University) |
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Journal Articles TANG, J. WARDLE, C. S. Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
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The maximum sustained swimming speeds ( U ms ) for large (0.45 m long) and small (0.15 m) Atlantic salmon were respectively 0.91ms-1 and 0.54ms-1. Video and cin6 films of fish swimming close to U ms were analysed to obtain variables required for the application of two hydrodynamic models, those of Lighthill and Yates, to determine the mean thrust ( T ) and mean power output ( P ) at these swimming speeds ( U ) close to U ms . A large fish (Salmon) and a small fish (Smolt) were selected for analysis. For salmon using Lighthill's model, T =0.30N and P =0.26W, and using Yates' model, T =0.28N and P =0.25W ( U /=0.87ms-1=0.96 U ms ). For smolt using Lighthill's model, T =0.0052N and P =0.0019W, and using Yates' model, T =0.0065 N and P =0.0024W ( U =0.37ms-1=0.69 U ms ). The power output for smolt swimming at 0.69 U ms was corrected to that required to swim at U ms , giving P =0.0059W (Lighthill's model) and P =0.0074W (Yates' model). At U ms it was assumed that all the red muscle was used. Two fish were selected from each size group and cross-sectioned to estimate their red muscle masses. Using a maximum mass-specific power output of 5–8 W kg- for slow red muscle fibres allowed us to calculate that the large and small fish have a power output capacity of 0.125–0.3 W and 0.007–0.019 W, respectively. The power output values at U ms derived from the different approaches for the large (0.25–0.26 W) and small (0.0059–0.0074 W) salmon agree closely. Effects of scaling are discussed. |
format |
Text |
author |
TANG, J. WARDLE, C. S. |
author_facet |
TANG, J. WARDLE, C. S. |
author_sort |
TANG, J. |
title |
Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
title_short |
Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
title_full |
Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
title_fullStr |
Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
title_full_unstemmed |
Power Output of Two Sizes of Atlantic Salmon (Salmo Salar) at their Maximum Sustained Swimming Speeds |
title_sort |
power output of two sizes of atlantic salmon (salmo salar) at their maximum sustained swimming speeds |
publisher |
Company of Biologists |
publishDate |
1992 |
url |
http://jeb.biologists.org/cgi/content/short/166/1/33 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://jeb.biologists.org/cgi/content/short/166/1/33 |
op_rights |
Copyright (C) 1992, Company of Biologists |
_version_ |
1766362397008723968 |