魚類における捕食者刺激の側性化処理に影響を与えるマイクロプラスチックの摂取

Georgiana Andrei¹, Alessandro Colombani¹, Elia Gatto^1,2

¹Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.

|December 17, 2025

Abstract:

Microplastic ingestion affects fish brains at the molecular level, but its impact on cognitive phenotype remains unclear. We fed zebrafish (Danio rerio) food containing either polyethylene or poly(butylene-adipate-co-terephthalate) microplastics for 20 days and assessed their lateralisation, which reflects how information processing is split between brain hemispheres. No changes appeared in rotational or mirror tests, but lateralisation was disrupted in the detour test when facing a predator model. These results suggest microplastic ingestion can impair specific cognitive traits at the phenotypic level.

キーワード:

認知生態学認知可塑性環境汚染側性化

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