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Fish personality affects their exposure to microplastics

斑马鱼 微塑料 大胆 卤水虾 生物 摄入 渔业 动物 人格 生态学 心理学 生物化学 社会心理学 基因
作者
Yuling Chen,Weiwei Li,Lingli Xiang,Mi Xiangyuan,Ming Duan,Chenxi Wu
出处
期刊:Ecotoxicology and Environmental Safety [Elsevier]
卷期号:233: 113301-113301 被引量:5
标识
DOI:10.1016/j.ecoenv.2022.113301
摘要

Microplastics (MPs) have been found in nearly half of the fish samples collected from the field worldwide. There are feeding behavior differences caused by animal personality among fish individuals. However, how personality affects the exposure of fish to microplastics is unclear. In this study, adult zebrafish were used as a model to study the effects of fish personality (boldness) on MPs exposure. Experiment showed that zebrafish captured MPs actively when MPs were added to the system but spit part of the MPs out after capturing. Bold zebrafish had higher feeding activities, captured MPs more frequently and swallowed more MPs than shy zebrafish. Zebrafish ingested brine shrimp preferentially when both brine shrimp and MPs were provided at the same time, and less MPs were swallowed in co-ingestion situation. Spearman correlation analysis indicated that there is a significantly positive correlation between boldness and feeding MPs frequency. Results of this work demonstrate that zebrafish mistake MPs as food and capture them actively but can discriminate MPs as inedible substances after ingestion and spit part of the MPs out. Bold zebrafish have a higher MP exposure burden than shy zebrafish due to their difference in feeding behaviors. The influence of fish personality needs to be considered for future toxicity studies and risk assessment of fish exposed to MPs.
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