Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon
Abstract Lowered rearing density has repeatedly been shown to increase the performance of hatchery‐reared salmonids stocked into natural environments. One possible mechanism for this pattern could be that lower densities enhance brain development, which has been shown to be the case in other hatcher...
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crwiley:10.1111/jzo.12392 2024-06-23T07:51:13+00:00 Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon Näslund, J. Larsen, M. H. Thomassen, S. T. Aarestrup, K. Johnsson, J. I. Svenska Forskningsrådet Formas 2016 http://dx.doi.org/10.1111/jzo.12392 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12392 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12392 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12392 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12392 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 301, issue 1, page 75-82 ISSN 0952-8369 1469-7998 journal-article 2016 crwiley https://doi.org/10.1111/jzo.12392 2024-06-13T04:24:49Z Abstract Lowered rearing density has repeatedly been shown to increase the performance of hatchery‐reared salmonids stocked into natural environments. One possible mechanism for this pattern could be that lower densities enhance brain development, which has been shown to be the case in other hatchery enhancement strategies, like environmental enrichment. Here, we investigated the size of the brain in hatchery‐reared Atlantic salmon Salmo salar kept at standard (high) and reduced (low) tank densities. In contrast to our predictions, we found that fish reared at high density had larger dry mass of cerebellum and telencephalon, correcting for body size. No differences were detected for total brain mass. Furthermore, we found that the relative size of both telencephalon and cerebellum, in relation to total brain mass, changed with body size. Cerebellum increased in relative size with increased body size, while the opposite pattern was observed for telencephalon. Overall, these results reveal substantial brain plasticity depending on the surrounding environment as well as ontogenetic adaptive changes in the brain of the Atlantic salmon. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Zoology 301 1 75 82 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Lowered rearing density has repeatedly been shown to increase the performance of hatchery‐reared salmonids stocked into natural environments. One possible mechanism for this pattern could be that lower densities enhance brain development, which has been shown to be the case in other hatchery enhancement strategies, like environmental enrichment. Here, we investigated the size of the brain in hatchery‐reared Atlantic salmon Salmo salar kept at standard (high) and reduced (low) tank densities. In contrast to our predictions, we found that fish reared at high density had larger dry mass of cerebellum and telencephalon, correcting for body size. No differences were detected for total brain mass. Furthermore, we found that the relative size of both telencephalon and cerebellum, in relation to total brain mass, changed with body size. Cerebellum increased in relative size with increased body size, while the opposite pattern was observed for telencephalon. Overall, these results reveal substantial brain plasticity depending on the surrounding environment as well as ontogenetic adaptive changes in the brain of the Atlantic salmon. |
author2 |
Svenska Forskningsrådet Formas |
format |
Article in Journal/Newspaper |
author |
Näslund, J. Larsen, M. H. Thomassen, S. T. Aarestrup, K. Johnsson, J. I. |
spellingShingle |
Näslund, J. Larsen, M. H. Thomassen, S. T. Aarestrup, K. Johnsson, J. I. Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
author_facet |
Näslund, J. Larsen, M. H. Thomassen, S. T. Aarestrup, K. Johnsson, J. I. |
author_sort |
Näslund, J. |
title |
Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
title_short |
Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
title_full |
Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
title_fullStr |
Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
title_full_unstemmed |
Environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared Atlantic salmon |
title_sort |
environment‐dependent plasticity and ontogenetic changes in the brain of hatchery‐reared atlantic salmon |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jzo.12392 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12392 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12392 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12392 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12392 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Zoology volume 301, issue 1, page 75-82 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jzo.12392 |
container_title |
Journal of Zoology |
container_volume |
301 |
container_issue |
1 |
container_start_page |
75 |
op_container_end_page |
82 |
_version_ |
1802642242944368640 |