Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar)
In stream-spawning salmonid fishes there is a considerable variation in the timing of when fry leave the spawning nests and establish a feeding territory. The timing of emergence from spawning nests appears to be related to behavioural and physiological traits, e.g. early emerging fish are bolder an...
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ftdtupubl:oai:pure.atira.dk:publications/b246c8ee-71ae-4419-802b-7f67e8626b2d 2024-09-15T17:56:16+00:00 Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) Thörnqvist, Per-Ove Höglund, Erik Winberg, Svante 2015 https://orbit.dtu.dk/en/publications/b246c8ee-71ae-4419-802b-7f67e8626b2d https://doi.org/10.1242/jeb.114314 eng eng https://orbit.dtu.dk/en/publications/b246c8ee-71ae-4419-802b-7f67e8626b2d info:eu-repo/semantics/restrictedAccess Thörnqvist , P-O , Höglund , E & Winberg , S 2015 , ' Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) ' , Journal of Experimental Biology , vol. 218 , no. 7 , pp. 1077-1083 . https://doi.org/10.1242/jeb.114314 RESEARCH ARTICLE article 2015 ftdtupubl https://doi.org/10.1242/jeb.114314 2024-07-29T23:50:17Z In stream-spawning salmonid fishes there is a considerable variation in the timing of when fry leave the spawning nests and establish a feeding territory. The timing of emergence from spawning nests appears to be related to behavioural and physiological traits, e.g. early emerging fish are bolder and more aggressive. In the present study, emerging Atlantic salmon (Salmo salar L.) alevins were sorted into three fractions: early, intermediate and late emerging. At the parr stage, behaviour, stress responses, hindbrain monoaminergic activity and forebrain gene expression were explored in fish from the early and late emerging fractions (first and last 25%). The results show that when subjected to confinement stress, fish from the late emerging fraction respond with a larger activation of the brain serotonergic system than fish from the early fraction. Similarly, in late emerging fish, stress resulted in elevated expression of mRNA coding for serotonin 1A receptors (5-HT1A), GABA-A receptor-associated protein and ependymin, effects not observed in fish from the early emerging fraction. Moreover, fish from the early emerging fraction displayed bolder behaviour than their late emerging littermates. Taken together, these results suggest that time of emergence, boldness and aggression are linked to each other, forming a behavioural syndrome in juvenile salmon. Differences in brain gene expression between early and late emerging salmon add further support to a relationship between stress coping style and timing of emergence. However, early and late emerging salmon do not appear to differ in hypothalamus–pituitary–interrenal (HPI) axis reactivity, another characteristic of divergent stress coping styles. Article in Journal/Newspaper Atlantic salmon Salmo salar Technical University of Denmark: DTU Orbit Journal of Experimental Biology 218 7 1077 1083 |
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Technical University of Denmark: DTU Orbit |
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English |
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RESEARCH ARTICLE |
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RESEARCH ARTICLE Thörnqvist, Per-Ove Höglund, Erik Winberg, Svante Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
topic_facet |
RESEARCH ARTICLE |
description |
In stream-spawning salmonid fishes there is a considerable variation in the timing of when fry leave the spawning nests and establish a feeding territory. The timing of emergence from spawning nests appears to be related to behavioural and physiological traits, e.g. early emerging fish are bolder and more aggressive. In the present study, emerging Atlantic salmon (Salmo salar L.) alevins were sorted into three fractions: early, intermediate and late emerging. At the parr stage, behaviour, stress responses, hindbrain monoaminergic activity and forebrain gene expression were explored in fish from the early and late emerging fractions (first and last 25%). The results show that when subjected to confinement stress, fish from the late emerging fraction respond with a larger activation of the brain serotonergic system than fish from the early fraction. Similarly, in late emerging fish, stress resulted in elevated expression of mRNA coding for serotonin 1A receptors (5-HT1A), GABA-A receptor-associated protein and ependymin, effects not observed in fish from the early emerging fraction. Moreover, fish from the early emerging fraction displayed bolder behaviour than their late emerging littermates. Taken together, these results suggest that time of emergence, boldness and aggression are linked to each other, forming a behavioural syndrome in juvenile salmon. Differences in brain gene expression between early and late emerging salmon add further support to a relationship between stress coping style and timing of emergence. However, early and late emerging salmon do not appear to differ in hypothalamus–pituitary–interrenal (HPI) axis reactivity, another characteristic of divergent stress coping styles. |
format |
Article in Journal/Newspaper |
author |
Thörnqvist, Per-Ove Höglund, Erik Winberg, Svante |
author_facet |
Thörnqvist, Per-Ove Höglund, Erik Winberg, Svante |
author_sort |
Thörnqvist, Per-Ove |
title |
Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
title_short |
Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
title_full |
Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
title_fullStr |
Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) |
title_sort |
natural selection constrains personality and brain gene expression differences in atlantic salmon (salmo salar) |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/b246c8ee-71ae-4419-802b-7f67e8626b2d https://doi.org/10.1242/jeb.114314 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Thörnqvist , P-O , Höglund , E & Winberg , S 2015 , ' Natural selection constrains personality and brain gene expression differences in Atlantic salmon (Salmo salar) ' , Journal of Experimental Biology , vol. 218 , no. 7 , pp. 1077-1083 . https://doi.org/10.1242/jeb.114314 |
op_relation |
https://orbit.dtu.dk/en/publications/b246c8ee-71ae-4419-802b-7f67e8626b2d |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1242/jeb.114314 |
container_title |
Journal of Experimental Biology |
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218 |
container_issue |
7 |
container_start_page |
1077 |
op_container_end_page |
1083 |
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1810432475846934528 |