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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
Human Health Effects
Marine & Wildlife
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Subchronic exposure to high-density polyethylene microplastics alone or in combination with chlortoluron significantly affected valve activity and daily growth of the Pacific oyster, Crassostrea gigas
Aquatic Toxicology2021
36 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 50
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Jérôme Cachot
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Jérôme Cachot
Justine Receveur,
Stéphane Le Floch,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Emmanuel Dubillot,
Arno Bringer,
Justine Receveur,
Hélène Thomas,
Hélène Thomas,
Emmanuel Dubillot,
Emmanuel Dubillot,
Jérôme Cachot
Emmanuel Dubillot,
Emmanuel Dubillot,
Emmanuel Dubillot,
Emmanuel Dubillot,
Jérôme Cachot
Jérôme Cachot
Arno Bringer,
Emmanuel Dubillot,
Arno Bringer,
Emmanuel Dubillot,
Arno Bringer,
Emmanuel Dubillot,
Arno Bringer,
Emmanuel Dubillot,
Emmanuel Dubillot,
Emmanuel Dubillot,
Arno Bringer,
Arno Bringer,
Arno Bringer,
Emmanuel Dubillot,
Jérôme Cachot
Hélène Thomas,
Hélène Thomas,
Stéphane Le Floch,
Arno Bringer,
Jérôme Cachot
Jérôme Cachot
Justine Receveur,
Jérôme Cachot
Justine Receveur,
Jérôme Cachot
Justine Receveur,
Hélène Thomas,
Justine Receveur,
Justine Receveur,
Justine Receveur,
Arno Bringer,
Arno Bringer,
Emmanuel Dubillot,
Emmanuel Dubillot,
Hélène Thomas,
Hélène Thomas,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Justine Receveur,
Jérôme Cachot
Emmanuel Dubillot,
Jérôme Cachot
Emmanuel Dubillot,
Stéphane Le Floch,
Justine Receveur,
Stéphane Le Floch,
Hélène Thomas,
Jérôme Cachot
Jérôme Cachot
Damien Tran,
Jérôme Cachot
Hélène Thomas,
Jérôme Cachot
Hélène Thomas,
Jérôme Cachot
Hélène Thomas,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Justine Receveur,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Hélène Thomas,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Justine Receveur,
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Jérôme Cachot
Summary
Researchers exposed Pacific oysters (Crassostrea gigas) to high-density polyethylene microplastics alone and combined with the herbicide chlortoluron, finding that the combination significantly impaired valve activity and daily shell growth more than either contaminant alone over a 90-day period.
Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due to their widespread use, their persistence and toxicity, they may induce adverse effects on physiology and behaviour of marine organisms such as the Pacific oyster (Crassostrea gigas). This study explored the growth and valve activity of juvenile oysters exposed for 24 days to two frequently detected pollutants in the Pertuis Charentais (South West, France): a herbicide (chlortoluron, 85 µg.L) and high-density polyethylene microparticles (HDPE 20-25 µm, 112 MP.mL) alone or in combination (cocktail condition; 97 µg.L of chlortoluron + 108 MP. mL). The valve activity of juvenile oysters recorded by using a High Frequency and Non-Invasive valvometer (HFNI) was characterized by three parameters: the number of valve micro-closures (VMC), the Valve Opening Amplitude (VOA), and the Valve Opening Duration (VOD). Additionally, daily shell growth and the oyster daily rhythm were assessed. The exposure to MPs of oysters led to a significant increase of VMC and a decrease of VOD and shell growth. The exposure to chlortoluron showed a significant increase of VOA and a decrease of VMC. In combination with MPs, chlortoluron still increased VOA and decreased VMC but also reduced the shell growth. Chronobiological analysis did not reveal any effects on the daily rhythm of both contaminants. This work highlighted significant effects of high environmental concentrations of MPs and Chlortoluron on the behaviour and growth of the Pacific oyster.