Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus)
In a duoculture experiment with Atlantic salmon parr (Salmo salar) and two Arctic char (Salvelinus alpinus) strains, both species showed increased growth rates compared with monoculture. In duoculture, salmon dispersed more evenly than in monoculture, maintaining positions among the char. Less frequ...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1989
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Online Access: | http://dx.doi.org/10.1139/f89-088 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-088 |
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crcansciencepubl:10.1139/f89-088 2024-06-23T07:49:34+00:00 Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) Holm, Jens Chr 1989 http://dx.doi.org/10.1139/f89-088 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-088 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue 4, page 697-704 ISSN 0706-652X 1205-7533 journal-article 1989 crcansciencepubl https://doi.org/10.1139/f89-088 2024-05-24T13:05:51Z In a duoculture experiment with Atlantic salmon parr (Salmo salar) and two Arctic char (Salvelinus alpinus) strains, both species showed increased growth rates compared with monoculture. In duoculture, salmon dispersed more evenly than in monoculture, maintaining positions among the char. Less frequent occurrence of dorsal fin rot was observed in duoculture salmon, probably indicating decreased intraspecific aggression, compared with monoculture salmon. It is suggested that shading and increased dispersion allowed a decrease in intraspecific salmon aggression. Arctic char social hierarchy, indicated by variance of mean inter-renal cell nucleus area, was changed in the presence of salmon, favouring the largest individuals belonging to one of the strains. Different ecological adaptations and size differences can explain the difference in growth gain from duoculture between the char strains. Temperature is suggested as a behavioural regulator in salmon–char duoculture. Article in Journal/Newspaper Arctic Atlantic salmon Salmo salar Salvelinus alpinus Canadian Science Publishing Arctic Canadian Journal of Fisheries and Aquatic Sciences 46 4 697 704 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
In a duoculture experiment with Atlantic salmon parr (Salmo salar) and two Arctic char (Salvelinus alpinus) strains, both species showed increased growth rates compared with monoculture. In duoculture, salmon dispersed more evenly than in monoculture, maintaining positions among the char. Less frequent occurrence of dorsal fin rot was observed in duoculture salmon, probably indicating decreased intraspecific aggression, compared with monoculture salmon. It is suggested that shading and increased dispersion allowed a decrease in intraspecific salmon aggression. Arctic char social hierarchy, indicated by variance of mean inter-renal cell nucleus area, was changed in the presence of salmon, favouring the largest individuals belonging to one of the strains. Different ecological adaptations and size differences can explain the difference in growth gain from duoculture between the char strains. Temperature is suggested as a behavioural regulator in salmon–char duoculture. |
format |
Article in Journal/Newspaper |
author |
Holm, Jens Chr |
spellingShingle |
Holm, Jens Chr Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
author_facet |
Holm, Jens Chr |
author_sort |
Holm, Jens Chr |
title |
Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
title_short |
Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
title_full |
Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
title_fullStr |
Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
title_full_unstemmed |
Mono- and Duoculture of juvenile Atlantic Salmon ( Salmo salar) and Arctic Char ( Salvelinus alpinus) |
title_sort |
mono- and duoculture of juvenile atlantic salmon ( salmo salar) and arctic char ( salvelinus alpinus) |
publisher |
Canadian Science Publishing |
publishDate |
1989 |
url |
http://dx.doi.org/10.1139/f89-088 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-088 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Atlantic salmon Salmo salar Salvelinus alpinus |
genre_facet |
Arctic Atlantic salmon Salmo salar Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue 4, page 697-704 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f89-088 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
46 |
container_issue |
4 |
container_start_page |
697 |
op_container_end_page |
704 |
_version_ |
1802640056684380160 |