Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system
The movements and distribution of groups of Arctic charr Salvelinus alpinus were examined in a rearing system that offered a choice between two different feeding tanks separated by a larger non‐feeding tank. The passages of individual fish were monitored continuously during a period of 3 weeks using...
Published in: | Journal of Fish Biology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1998
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1998.tb01833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1998.tb01833.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1998.tb01833.x |
id |
crwiley:10.1111/j.1095-8649.1998.tb01833.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1095-8649.1998.tb01833.x 2024-06-02T08:00:04+00:00 Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system Brännäs, E. 1998 http://dx.doi.org/10.1111/j.1095-8649.1998.tb01833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1998.tb01833.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1998.tb01833.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 53, issue 4, page 795-807 ISSN 0022-1112 1095-8649 journal-article 1998 crwiley https://doi.org/10.1111/j.1095-8649.1998.tb01833.x 2024-05-03T10:45:42Z The movements and distribution of groups of Arctic charr Salvelinus alpinus were examined in a rearing system that offered a choice between two different feeding tanks separated by a larger non‐feeding tank. The passages of individual fish were monitored continuously during a period of 3 weeks using the PIT (passive integrated transponder)‐tag technique. The primary aim was to examine if only some charr were occupying the feeding tanks, thereby excluding other individuals, and whether differences in visit activity explained within‐group variation in individual growth. On average, about 35 of the 40 charr in each group shoaled in the large non‐feeding tank leaving only five individuals in the feeding tanks. Charr that spent a long total time in one of the feeding tanks made frequent excursions to the other tanks resulting in a continuous exchange of individuals. Individual growth rates were correlated positively with visit activity rather than with the total time spent in the feeding tanks. Thus, individuals with low growth rate spent as much time in feeding tanks as charr with high growth rate. However, less successful fish tended to visit the feeding tanks at night when the feeders were switched off. Based on behavioural and growth results obtained in this experiment, the use of multitank systems in the cultivation of Arctic charr is discussed. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Wiley Online Library Arctic Journal of Fish Biology 53 4 795 807 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The movements and distribution of groups of Arctic charr Salvelinus alpinus were examined in a rearing system that offered a choice between two different feeding tanks separated by a larger non‐feeding tank. The passages of individual fish were monitored continuously during a period of 3 weeks using the PIT (passive integrated transponder)‐tag technique. The primary aim was to examine if only some charr were occupying the feeding tanks, thereby excluding other individuals, and whether differences in visit activity explained within‐group variation in individual growth. On average, about 35 of the 40 charr in each group shoaled in the large non‐feeding tank leaving only five individuals in the feeding tanks. Charr that spent a long total time in one of the feeding tanks made frequent excursions to the other tanks resulting in a continuous exchange of individuals. Individual growth rates were correlated positively with visit activity rather than with the total time spent in the feeding tanks. Thus, individuals with low growth rate spent as much time in feeding tanks as charr with high growth rate. However, less successful fish tended to visit the feeding tanks at night when the feeders were switched off. Based on behavioural and growth results obtained in this experiment, the use of multitank systems in the cultivation of Arctic charr is discussed. |
format |
Article in Journal/Newspaper |
author |
Brännäs, E. |
spellingShingle |
Brännäs, E. Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
author_facet |
Brännäs, E. |
author_sort |
Brännäs, E. |
title |
Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
title_short |
Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
title_full |
Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
title_fullStr |
Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
title_full_unstemmed |
Individual variation in distribution, activity and growth rate of Arctic charr kept in a three‐tank system |
title_sort |
individual variation in distribution, activity and growth rate of arctic charr kept in a three‐tank system |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1998.tb01833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1998.tb01833.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1998.tb01833.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Journal of Fish Biology volume 53, issue 4, page 795-807 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1998.tb01833.x |
container_title |
Journal of Fish Biology |
container_volume |
53 |
container_issue |
4 |
container_start_page |
795 |
op_container_end_page |
807 |
_version_ |
1800744081845911552 |