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- Mes, D. (author)
Effects of environmental enrichment on forebrain neural plasticity and survival success of stocked Atlantic salmon
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-01-01
- The Company of Biologists,2019
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- LIBRIS-ID:oai:gup.ub.gu.se/289968
- https://gup.ub.gu.se/publication/289968URI
- https://doi.org/10.1242/jeb.212258DOI
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- Language:English
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- 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 safer) 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 dos 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 postrelease 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.
Subject headings and genre
- NATURVETENSKAP Biologi Zoologi hsv//swe
- NATURAL SCIENCES Biological Sciences Zoology hsv//eng
- bdnf
- cfos
- Cognition
- Neuroanatomy
- rearing environment
- spatial memory
- rainbow-trout
- coping styles
- long-term
- hatchery
- behavior
- brain
- salar
- wild
- Life Sciences & Biomedicine - Other Topics
Added entries (persons, corporate bodies, meetings, titles ...)
- van Os, R. (author)
- Gorissen, M. (author)
- Ebbesson, L. O. E. (author)
- Finstad, B. (author)
- Mayer, I. (author)
- Vindas, Marco A.Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi,Institute of Neuroscience and Physiology(Swepub:gu)xvindm (author)
- Göteborgs universitetInstitutionen för neurovetenskap och fysiologi (creator_code:org_t)
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- In:Journal of Experimental Biology: The Company of Biologists222:230022-09491477-9145
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