Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage
Abstract Dorsal fin damage in salmonid fishes is primarily caused by aggression. While undesirable in fish culture, it can nevertheless be a useful tool to study social interactions in large groups of fish where it is difficult to study the behaviour of known individuals directly. We used low Ž . te...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1061.4348 2023-05-15T15:31:35+02:00 Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage Amanda Maclean Neil B Metcalfe David Mitchell The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1061.4348 http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1061.4348 http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf text 2000 ftciteseerx 2020-04-19T00:20:08Z Abstract Dorsal fin damage in salmonid fishes is primarily caused by aggression. While undesirable in fish culture, it can nevertheless be a useful tool to study social interactions in large groups of fish where it is difficult to study the behaviour of known individuals directly. We used low Ž . temperature treatment to manipulate the growth rates of juvenile Atlantic salmon Salmo salar in the spring and followed the development of fin damage in tagged individuals. Fin damage did not develop until mid-summer, possibly because of a qualitative change in the nature of aggressive Ž attacks. The probability of having fin damage was strongly related to relative body size fork . length within each group of fish: the largest fish in a tank were up to six times more likely to have damaged fins than the smallest fish. While studies of small groups of salmonids have demonstrated that subordinates are the main recipients of fin damage, the results of this study indicate that the reverse is true in larger groups. We propose that this is because dominant fish compete aggressively amongst themselves and incur fin damage, while less aggressive individuals adopt alternative feeding strategies that result in lower levels of food intake and growth, but reduce the risk of injury. Similar studies could be used to assess the success of feeding regimes in reducing the level of aggression in cultured populations. q Text Atlantic salmon Salmo salar Unknown |
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English |
description |
Abstract Dorsal fin damage in salmonid fishes is primarily caused by aggression. While undesirable in fish culture, it can nevertheless be a useful tool to study social interactions in large groups of fish where it is difficult to study the behaviour of known individuals directly. We used low Ž . temperature treatment to manipulate the growth rates of juvenile Atlantic salmon Salmo salar in the spring and followed the development of fin damage in tagged individuals. Fin damage did not develop until mid-summer, possibly because of a qualitative change in the nature of aggressive Ž attacks. The probability of having fin damage was strongly related to relative body size fork . length within each group of fish: the largest fish in a tank were up to six times more likely to have damaged fins than the smallest fish. While studies of small groups of salmonids have demonstrated that subordinates are the main recipients of fin damage, the results of this study indicate that the reverse is true in larger groups. We propose that this is because dominant fish compete aggressively amongst themselves and incur fin damage, while less aggressive individuals adopt alternative feeding strategies that result in lower levels of food intake and growth, but reduce the risk of injury. Similar studies could be used to assess the success of feeding regimes in reducing the level of aggression in cultured populations. q |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Amanda Maclean Neil B Metcalfe David Mitchell |
spellingShingle |
Amanda Maclean Neil B Metcalfe David Mitchell Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
author_facet |
Amanda Maclean Neil B Metcalfe David Mitchell |
author_sort |
Amanda Maclean |
title |
Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
title_short |
Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
title_full |
Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
title_fullStr |
Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
title_full_unstemmed |
Alternative competitive strategies in juvenile ž / Atlantic salmon Salmo salar : evidence from fin damage |
title_sort |
alternative competitive strategies in juvenile ž / atlantic salmon salmo salar : evidence from fin damage |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1061.4348 http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1061.4348 http://directory.umm.ac.id/Data%20Elmu/jurnal/A/Aquaculture/Vol184.Issue3-4.Apr2000/61143.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766362104303976448 |