期刊
ENVIRONMENTAL BIOLOGY OF FISHES
卷 102, 期 5, 页码 705-712出版社
SPRINGER
DOI: 10.1007/s10641-019-00864-9
关键词
Salmonids; Cerebellum size; Environmental enrichment; Tank density; Hatchery environment
资金
- Swedish Research Council FORMAS
- Adlerbertska forskningsstiftelsen
This paper describes a study on the environmentally dependent brain size plasticity in hatchery-reared Atlantic salmon Salmo salar L. Using a factorial experimental design, we tested whether tank fish density, local hatchery standard (150 fish . m(-2)) vs. reduced (50 fish . m(-2)) and structural enrichment, a bundle of submerged plastic stripes, had effects on the size of the cerebellar region of the brain. Fish reared at reduced density had smaller cerebella, while structural enrichment had no detectable effects. The density effect on cerebellum, which is involved in locomotion and cognition, confirms previous results from hatchery-reared Atlantic salmon. The lack of detectable positive effects of enrichment, which contrasts some previous studies, provide further evidence for a complex relationship between environmental complexity and brain growth.
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