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Pearl Farming Micro-Nanoplastics Affect Oyster Physiology and Pearl Quality
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Researchers studied how micro- and nanoplastics from weathered pearl farming equipment affect oyster health and pearl quality in French Polynesia. Even at very low concentrations, the plastic particles reduced the oysters' ability to absorb nutrients and altered gene expression related to shell formation. The findings raise concerns that plastic pollution from farming equipment could threaten pearl quality and the long-term viability of the pearl industry.
Pearl farming is crucial for the economy of French Polynesia. However, rearing structures contribute significantly to plastic waste, and the widespread contamination of pearl farming lagoons by microplastics has raised concerns about risks to the pearl industry. This study aimed to evaluate the effects of micro-nanoplastics (MNPs, 0.4-200 μm) on the pearl oyster (Pinctada margaritifera) over a 5-month pearl production cycle by closely mimicking ecological scenarios. MNPs were produced from weathered plastic pearl farming gear and tested at environmentally relevant concentrations (0.025 and 1 μg L-1) to decipher biological and functional responses through integrative approaches. The significant findings highlighted the impacts of MNPs on oyster physiology and pearl quality, even at remarkably low concentrations. Exposure to MNPs induced changes in energy metabolism, predominantly driven by reduced assimilation efficiency of microalgae, leading to an alteration in gene expression patterns. A distinct gene expression module exhibited a strong correlation with physiological parameters affected by MNP conditions, identifying key genes as potential environmental indicators of nutritional-MNP stress in cultured oysters. The alteration in pearl biomineralization, evidenced by thinner aragonite crystals and the presence of abnormal biomineral concretions, known as keshi pearls, raises concerns about the potential long-term impact on the Polynesian pearl industry.
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Pearl farming micro-nanoplastics affect both oyster physiology and pearl quality
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Researchers exposed pearl oysters in French Polynesian lagoons to micro- and nanoplastics shed from pearl farming equipment itself, and found that even environmentally realistic concentrations disrupted energy metabolism and reduced how efficiently the oysters absorbed food from algae. After five months of exposure, both oyster health markers and pearl quality were measurably degraded. This shows that plastic pollution in aquaculture settings can undermine the very industry it contaminates, linking environmental and economic harm.
Pearl Farming Micro-nanoplastics Affect Oyster Physiology and Pearl Quality
AI summary Read the abstract
Pearl oysters (Pinctada margaritifera) exposed to micro-nanoplastics shed from plastic pearl farming equipment showed disrupted energy metabolism, reduced assimilation of microalgae food, and impaired pearl quality over a five-month production cycle. The study is notable because it tested environmentally realistic plastic concentrations, linking the industry's own plastic infrastructure to measurable biological harm in the farmed animals.
Pearl farming micro-nanoplastics affect both oyster physiology and pearl quality
AI summary Read the abstract
Pearl oysters (Pinctada margaritifera) in French Polynesia were exposed to micro-nanoplastics derived from actual farming equipment over a five-month production cycle, and the plastics disrupted the oysters' energy metabolism and altered the crystal structure of growing pearls. The study demonstrates that microplastic contamination in lagoons poses a real economic threat to the pearl industry alongside its ecological impacts.
Pearl Farming Micro-Nanoplastics Affect Oyster Physiology and Pearl Quality
AI summary Read the abstract
Pearl farming plastic gear was found to generate micro-nanoplastics (0.4-200 um) that affect pearl oyster (Pinctada margaritifera) physiology and pearl quality over a 5-month production cycle. The study closely mimicked real ecological conditions to assess risks to the pearl farming industry in French Polynesia.
Pearl farming micro-nanoplastics affect both oyster physiology and pearl quality
AI summary Read the abstract
Microplastics shed from pearl farming equipment accumulate in lagoon waters and, even at low concentrations, disrupt the energy metabolism, immune function, and reproductive biology of pearl oysters over a 5-month production cycle. Pearl quality was measurably degraded, meaning plastic pollution from aquaculture gear creates a feedback loop that harms the very industry generating it. This highlights a practical economic incentive — beyond ecological concern — for reducing plastic use in mariculture.
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