| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Microplastics Affect Energy Balance and Gametogenesis in the Pearl Oyster Pinctada margaritifera
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| Autores: |
Gardon, Tony
Reisser, Celine
Soyez, Claude
Quillien, Virgile
Le Moullac, Gilles
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| Data: |
2018-05
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| Ano: |
2018
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| Resumo: |
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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00435/54684/56104.pdf
DOI:10.1021/acs.est.8b00168
https://archimer.ifremer.fr/doc/00435/54684/
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| Editor: |
Amer Chemical Soc
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| Formato: |
application/pdf
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| Fonte: |
Environmental Science & Technology (0013-936X) (Amer Chemical Soc), 2018-05 , Vol. 52 , N. 9 , P. 5277-5286
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| Direitos: |
2018 American Chemical Society
info:eu-repo/semantics/openAccess
restricted use
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