Pubblicazione scientifica

Neurobiology of Wild and Hatchery-Reared Atlantic Salmon: How Nurture Drives Neuroplasticity

FILONE TECNOLOGICO	TEMA
produzione e raccolta
trasformazione e commercializzazione

RIASSUNTO

Life experiences in the rearing environment shape the neural and behavioral plasticity of animals. In fish stocking practices, the hatchery environment is relatively stimulus-deprived and does not optimally prepare fish for release into the wild. While the behavioral differences between wild and hatchery-reared fish have been examined to some extent, few studies have compared neurobiological characteristics between wild and hatchery-reared individuals. Here, we compare the expression of immediate early gene cfos and neuroplasticity marker brain-derived neurotrophic factor (bdnf) in telencephalic subregions associated with processing of stimuli in wild and hatchery-reared Atlantic salmon at basal and 30 min post (acute) stress conditions. Using in situ hybridization, we found that the expression level of these markers is highly specific per neuronal region and affected by both the origin of the fish, and exposure to acute stress. Expression of cfos was increased by stress in all brain regions and cfos was more highly expressed in the Dlv (functional equivalent to the mammalian hippocampus) of hatchery-reared compared to wild fish. Expression of bdnf was higher overall in hatchery fish, while acute stress upregulated bdnf in the Dm (functional equivalent to the mammalian amygdala) of wild, but not hatchery individuals. Our findings demonstrate that the hatchery environment affects neuroplasticity and neural activation in brain regions that are important for learning processes and stress reactivity, providing a neuronal foundation for the behavioral differences observed between wild and hatchery-reared fish.

DATA

Data di pubblicazione: 11/09/2018

AUTORI

MES DAAN
VON KROGH KRISTINE
GORISSEN MARNIX
MAYER IAN
VINDAS MARCO A

ENTE DI AFFERENZA

DEPT PROD ANIMAL CLINICAL SCIENCES NORWEGIAN UNIV LIFE SCIENCES OSLO NORWAY
DEPT BASIC SCIENCES & AQUATIC MEDICINE NORWEGIAN UNIV LIFE SCIENCES OSLO NORWAY
DEPT ANIMAL ECOLOGY & PHYSIOLOGY INST WATER & WETLAND RSCH RADBOUD UNIV NIJMEGEN NETHERLANDS
UNI ENVIRONMENT UNI RSCH AS BERGEN NORWAY
DEPT NEUROBIOLOGY & PHYSIOLOGY UNIV GOTHENBURG GOTHENBURG SWEDEN
DEPT FOOD SAFETY & INFECTION BIOLOGY NORWEGIAN UNIV LIFE SCIENCES OSLO NORWAY

RIVISTA

Frontiers in Behavioral Neuroscience, 12, 210

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