Zebrafish can recognize microplastics as inedible materials: Quantitative evidence of ingestion behavior

The Science of the Total Environment
Shin Woong KimYoun-Joo An

Abstract

This study investigated the ingestion behavior of zebrafish exposed to microplastic particles (MPs) at different concentrations, presented alone or in a mix with food particles. Zebrafish showed spitting behavior after ingesting micro-sized (247.5 μm) polyethylene particles (i.e., MPs), with prey-capture time increasing when food and MPs were supplied simultaneously. Fish were compelled to ingest MPs with food, and the accumulation percentage (ingested particles/supplied particles) was quantified as 0.5 to 9.4% with increasing food volume. However, the accumulation percentage was determined as 0.0 to 1.0% under exposure to MPs only, and as 3.8 to 4.3% at high MP concentrations when the food concentration was fixed. Overall, these results demonstrate that small freshwater organisms can recognize that MPs are not food items. Under laboratory conditions, zebrafish rarely discriminate between food and MPs when both are presented together, and the indiscriminate feeding behavior becomes clearer as more food is available.

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Citations

Jul 28, 2020·Scientific Reports·Carolina De Sales-RibeiroMaría José Caballero
Aug 7, 2020·Environmental Pollution·Danielle Regina Gomes Ribeiro-BrasilLuciano Fogaça de Assis Montag
Nov 4, 2020·Environmental Science and Pollution Research International·Mahdi BanaeeAhmed Th A Ibrahim
Feb 5, 2021·Bioresource Technology·Huiyuan ZhongYaozong Zhang
Dec 6, 2020·The Science of the Total Environment·Kaihang XuJun Wang
Jul 29, 2019·Ecotoxicology and Environmental Safety·Chu Wa MakKing Ming Chan
May 4, 2020·The Science of the Total Environment·Jacky BhagatYasuhito Shimada
Jul 31, 2021·The Science of the Total Environment·Zhaoqing WangTanguang Gao
Jul 20, 2021·Environmental Pollution·Silvia GalafassiPietro Volta
Oct 31, 2019·Environmental Science & Technology·France CollardBruno Tassin

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