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Publication . Other literature type . Article . 2018

Microplastics Affect Energy Balance and Gametogenesis in the Pearl Oyster Pinctada margaritifera

Tony Gardon; Céline M. O. Reisser; Claude Soyez; Virgile Quillien; Gilles Le Moullac;
Open Access
Published: 01 May 2018
Publisher: Amer Chemical Soc
Country: France

Plastic pollution in the environment is increasing at global scale. Microplastics (MP) are derived from degradation of larger plastic items or directly produced in microparticles form (<5 mm). Plastics, widely used in structures and equipments of pearl farming, are a source of pollution to the detriment of the lagoon ecosystem. In order to evaluate the impact of MP on the physiology of Pinctada margaritifera, a species of ecological and commercial interests, adult oysters were exposed to polystyrene microbeads (micro-PS of 6 and 10 μm) for 2 months. Three concentrations were tested: 0.25, 2.5, 25 μg L-1 and a control. Ingestion and respiration rate and assimilation efficiency were monitored on a metabolic measurement system to determine the individual energy balance (Scope For Growth, SFG). Effects on reproduction were also assessed. The assimilation efficiency decreased significantly according to micro-PS concentration. The SFG was significantly impacted by a dose-dependent decrease from 0.25 μg L-1 (p < 0.0001). A negative SFG was measured in oysters exposed to 25 μg L-1. Gonads may have provided the missing energy to maintain animals’ metabolism through the production of metabolites derived from germ cells phagocytosis. This study shows that micro-PS significantly impact the assimilation efficiency and more broadly the energy balance of P. margaritifera, with negative repercussions on reproduction.

Subjects by Vocabulary

Microsoft Academic Graph classification: Pinctada margaritifera biology.organism_classification biology Pollution media_common.quotation_subject media_common Environmental science Pinctada Microplastics Ostreidae Ecosystem Animal science Respiration rate Plastic pollution


Environmental Chemistry, General Chemistry