The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise
The effects of long-term moderate exercise on the behaviour and the food intake – growth relationship of individually marked Arctic charr, Salvelinus alpinus L., were examined. Direct monitoring of food intake of individual fish was carried out using an X-radiographic method. Growth (weight gain) wa...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/z90-303 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-303 |
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crcansciencepubl:10.1139/z90-303 2024-09-15T17:52:21+00:00 The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise Christiansen, Jørgen Schou Jobling, Malcolm 1990 http://dx.doi.org/10.1139/z90-303 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-303 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 68, issue 10, page 2185-2191 ISSN 0008-4301 1480-3283 journal-article 1990 crcansciencepubl https://doi.org/10.1139/z90-303 2024-07-25T04:10:07Z The effects of long-term moderate exercise on the behaviour and the food intake – growth relationship of individually marked Arctic charr, Salvelinus alpinus L., were examined. Direct monitoring of food intake of individual fish was carried out using an X-radiographic method. Growth (weight gain) was significantly improved with increasing swimming speed, and a maximum specific growth rate was obtained at a swimming speed of approximately 1.75 body lengths/s. Growth appeared to be suppressed by high levels of aggressive interactions, and an increase in swimming speed caused a marked increase in schooling behaviour, with a concomitant reduction in agonistic activity. The exercising fish did not consume more food than controls, and moderately exercised Arctic charr showed improved growth – food intake ratios at all levels of food intake compared with fish held in standing water. Furthermore, the proportions of nonfeeding fish were significantly reduced at increasing water velocities. Thus, the relationship between food intake and growth may be strongly influenced by agonistic activity, which appears to be most prevalent in fish subjected to low water velocities. Article in Journal/Newspaper Arctic charr Salvelinus alpinus Canadian Science Publishing Canadian Journal of Zoology 68 10 2185 2191 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The effects of long-term moderate exercise on the behaviour and the food intake – growth relationship of individually marked Arctic charr, Salvelinus alpinus L., were examined. Direct monitoring of food intake of individual fish was carried out using an X-radiographic method. Growth (weight gain) was significantly improved with increasing swimming speed, and a maximum specific growth rate was obtained at a swimming speed of approximately 1.75 body lengths/s. Growth appeared to be suppressed by high levels of aggressive interactions, and an increase in swimming speed caused a marked increase in schooling behaviour, with a concomitant reduction in agonistic activity. The exercising fish did not consume more food than controls, and moderately exercised Arctic charr showed improved growth – food intake ratios at all levels of food intake compared with fish held in standing water. Furthermore, the proportions of nonfeeding fish were significantly reduced at increasing water velocities. Thus, the relationship between food intake and growth may be strongly influenced by agonistic activity, which appears to be most prevalent in fish subjected to low water velocities. |
format |
Article in Journal/Newspaper |
author |
Christiansen, Jørgen Schou Jobling, Malcolm |
spellingShingle |
Christiansen, Jørgen Schou Jobling, Malcolm The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
author_facet |
Christiansen, Jørgen Schou Jobling, Malcolm |
author_sort |
Christiansen, Jørgen Schou |
title |
The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
title_short |
The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
title_full |
The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
title_fullStr |
The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
title_full_unstemmed |
The behaviour and the relationship between food intake and growth of juvenile Arctic charr, Salvelinus alpinus L., subjected to sustained exercise |
title_sort |
behaviour and the relationship between food intake and growth of juvenile arctic charr, salvelinus alpinus l., subjected to sustained exercise |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/z90-303 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-303 |
genre |
Arctic charr Salvelinus alpinus |
genre_facet |
Arctic charr Salvelinus alpinus |
op_source |
Canadian Journal of Zoology volume 68, issue 10, page 2185-2191 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z90-303 |
container_title |
Canadian Journal of Zoology |
container_volume |
68 |
container_issue |
10 |
container_start_page |
2185 |
op_container_end_page |
2191 |
_version_ |
1810294401062141952 |