Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon
Fish reared for stocking programmes are severely stimulus deprived compared with their wild conspecifics raised under natural conditions. This leads to reduced behavioural plasticity and low post-release survival of stocked fish. Environmental enrichment can have positive effects on important life s...
Published in: | Journal of Experimental Biology |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
The Company of Biologists Ltd
2019
|
Subjects: | |
Online Access: | http://jeb.biologists.org/cgi/content/short/222/23/jeb212258 https://doi.org/10.1242/jeb.212258 |
id |
fthighwire:oai:open-archive.highwire.org:jexbio:222/23/jeb212258 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jexbio:222/23/jeb212258 2023-05-15T15:30:37+02:00 Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon Mes, Daan van Os, Renske Gorissen, Marnix Ebbesson, Lars O. E. Finstad, Bengt Mayer, Ian Vindas, Marco A. 2019-12-04 07:47:31.0 text/html http://jeb.biologists.org/cgi/content/short/222/23/jeb212258 https://doi.org/10.1242/jeb.212258 en eng The Company of Biologists Ltd http://jeb.biologists.org/cgi/content/short/222/23/jeb212258 http://dx.doi.org/10.1242/jeb.212258 Copyright (C) 2019, Company of Biologists RESEARCH ARTICLE TEXT 2019 fthighwire https://doi.org/10.1242/jeb.212258 2019-12-29T20:55:56Z Fish reared for stocking programmes are severely stimulus deprived compared with their wild conspecifics raised under natural conditions. This leads to reduced behavioural plasticity and low post-release survival of stocked fish. Environmental enrichment can have positive effects on important life skills, such as predator avoidance and foraging behaviour, but the neural mechanisms underpinning these behavioural changes are still largely unknown. In this study, juvenile Atlantic salmon ( Salmo salar ) were reared in an enriched hatchery environment for 7 weeks, after which neurobiological characteristics and post-release survival were compared with those of fish reared under normal hatchery conditions. Using in situ hybridization and qPCR, we quantified the expression of brain-derived neurotrophic factor ( bdnf ) and the neural activity marker cfos in telencephalic subregions associated with relational memory, emotional learning and stress reactivity. Aside from lower expression of bdnf in the Dlv (a region associated with relational memory) of enriched salmon, we observed no other significant effects of enrichment in the studied regions. Exposure to an enriched environment increased post-release survival during a 5 month residence in a natural river by 51%. Thus, we demonstrate that environmental enrichment can improve stocking success of Atlantic salmon parr and that environmental enrichment is associated with changes in bdnf expression in the fish's hippocampus-equivalent structure. Text Atlantic salmon Salmo salar HighWire Press (Stanford University) Journal of Experimental Biology |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
RESEARCH ARTICLE |
spellingShingle |
RESEARCH ARTICLE Mes, Daan van Os, Renske Gorissen, Marnix Ebbesson, Lars O. E. Finstad, Bengt Mayer, Ian Vindas, Marco A. Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
topic_facet |
RESEARCH ARTICLE |
description |
Fish reared for stocking programmes are severely stimulus deprived compared with their wild conspecifics raised under natural conditions. This leads to reduced behavioural plasticity and low post-release survival of stocked fish. Environmental enrichment can have positive effects on important life skills, such as predator avoidance and foraging behaviour, but the neural mechanisms underpinning these behavioural changes are still largely unknown. In this study, juvenile Atlantic salmon ( Salmo salar ) were reared in an enriched hatchery environment for 7 weeks, after which neurobiological characteristics and post-release survival were compared with those of fish reared under normal hatchery conditions. Using in situ hybridization and qPCR, we quantified the expression of brain-derived neurotrophic factor ( bdnf ) and the neural activity marker cfos in telencephalic subregions associated with relational memory, emotional learning and stress reactivity. Aside from lower expression of bdnf in the Dlv (a region associated with relational memory) of enriched salmon, we observed no other significant effects of enrichment in the studied regions. Exposure to an enriched environment increased post-release survival during a 5 month residence in a natural river by 51%. Thus, we demonstrate that environmental enrichment can improve stocking success of Atlantic salmon parr and that environmental enrichment is associated with changes in bdnf expression in the fish's hippocampus-equivalent structure. |
format |
Text |
author |
Mes, Daan van Os, Renske Gorissen, Marnix Ebbesson, Lars O. E. Finstad, Bengt Mayer, Ian Vindas, Marco A. |
author_facet |
Mes, Daan van Os, Renske Gorissen, Marnix Ebbesson, Lars O. E. Finstad, Bengt Mayer, Ian Vindas, Marco A. |
author_sort |
Mes, Daan |
title |
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
title_short |
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
title_full |
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
title_fullStr |
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
title_full_unstemmed |
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon |
title_sort |
effects of environmental enrichment on forebrain neural plasticity and survival success of stocked atlantic salmon |
publisher |
The Company of Biologists Ltd |
publishDate |
2019 |
url |
http://jeb.biologists.org/cgi/content/short/222/23/jeb212258 https://doi.org/10.1242/jeb.212258 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://jeb.biologists.org/cgi/content/short/222/23/jeb212258 http://dx.doi.org/10.1242/jeb.212258 |
op_rights |
Copyright (C) 2019, Company of Biologists |
op_doi |
https://doi.org/10.1242/jeb.212258 |
container_title |
Journal of Experimental Biology |
_version_ |
1766361071405236224 |