Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions
We investigated the relationship between social interactions, brain serotonergic activity, and two behavioural patterns in juvenile Arctic char (Salvelinus alpinus): feeding and spontaneous swimming activity. Dominant and subordinate individuals were observed during rearing in pairs, followed by rea...
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1998
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Online Access: | http://dx.doi.org/10.1139/z98-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/z98-050 |
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crcansciencepubl:10.1139/z98-050 2024-06-23T07:50:05+00:00 Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions Øverli, Øyvind Winberg, Svante Damsård, Børge Jobling, Malcolm 1998 http://dx.doi.org/10.1139/z98-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/z98-050 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 76, issue 7, page 1366-1370 ISSN 0008-4301 1480-3283 journal-article 1998 crcansciencepubl https://doi.org/10.1139/z98-050 2024-06-06T04:11:17Z We investigated the relationship between social interactions, brain serotonergic activity, and two behavioural patterns in juvenile Arctic char (Salvelinus alpinus): feeding and spontaneous swimming activity. Dominant and subordinate individuals were observed during rearing in pairs, followed by rearing in isolation. Throughout the experiment, levels of both food intake and swimming activity remained high in dominant fish. When they were in pairs, food intake was completely inhibited in subordinate fish; thus, dominant fish were able to monopolise food. At the same time, brain serotonergic activity, as indexed by the ratio of 5-hydroxyindoleacetic acid (5-HIAA) to serotonin (5-hydroxytryptamine, 5-HT) was elevated in the hypothalamus and brain stem of subordinate fish compared with dominants. During subsequent rearing in isolation, food intake, but not spontaneous locomotor activity, gradually increased in previously subordinate fish, while serotonergic activity fell to near that of dominants. Thus, appetite inhibition in subordinate fish can be reversed by rearing in isolation, an effect that may be related to the reversal of a stress-induced activation of brain serotonergic neurones accompanying social subordination. Reduced swimming activity is either a long-lasting response to social subordination or reflects permanently different behavioural strategies of subordinate and dominant individuals. Article in Journal/Newspaper Arctic Salvelinus alpinus Canadian Science Publishing Arctic Canadian Journal of Zoology 76 7 1366 1370 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
We investigated the relationship between social interactions, brain serotonergic activity, and two behavioural patterns in juvenile Arctic char (Salvelinus alpinus): feeding and spontaneous swimming activity. Dominant and subordinate individuals were observed during rearing in pairs, followed by rearing in isolation. Throughout the experiment, levels of both food intake and swimming activity remained high in dominant fish. When they were in pairs, food intake was completely inhibited in subordinate fish; thus, dominant fish were able to monopolise food. At the same time, brain serotonergic activity, as indexed by the ratio of 5-hydroxyindoleacetic acid (5-HIAA) to serotonin (5-hydroxytryptamine, 5-HT) was elevated in the hypothalamus and brain stem of subordinate fish compared with dominants. During subsequent rearing in isolation, food intake, but not spontaneous locomotor activity, gradually increased in previously subordinate fish, while serotonergic activity fell to near that of dominants. Thus, appetite inhibition in subordinate fish can be reversed by rearing in isolation, an effect that may be related to the reversal of a stress-induced activation of brain serotonergic neurones accompanying social subordination. Reduced swimming activity is either a long-lasting response to social subordination or reflects permanently different behavioural strategies of subordinate and dominant individuals. |
format |
Article in Journal/Newspaper |
author |
Øverli, Øyvind Winberg, Svante Damsård, Børge Jobling, Malcolm |
spellingShingle |
Øverli, Øyvind Winberg, Svante Damsård, Børge Jobling, Malcolm Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
author_facet |
Øverli, Øyvind Winberg, Svante Damsård, Børge Jobling, Malcolm |
author_sort |
Øverli, Øyvind |
title |
Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
title_short |
Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
title_full |
Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
title_fullStr |
Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
title_full_unstemmed |
Food intake and spontaneous swimming activity in Arctic char ( Salvelinus alpinus): role of brain serotonergic activity and social interactions |
title_sort |
food intake and spontaneous swimming activity in arctic char ( salvelinus alpinus): role of brain serotonergic activity and social interactions |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/z98-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/z98-050 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Salvelinus alpinus |
genre_facet |
Arctic Salvelinus alpinus |
op_source |
Canadian Journal of Zoology volume 76, issue 7, page 1366-1370 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z98-050 |
container_title |
Canadian Journal of Zoology |
container_volume |
76 |
container_issue |
7 |
container_start_page |
1366 |
op_container_end_page |
1370 |
_version_ |
1802640847119843328 |