Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).

Layse Rodrigues do Rozario Teixeira Lins; Miguel Saldaña-Serrano; Carlos Henrique Araújo de Miranda Gomes; Mariana Rangel Pilotto; Luiz Otávio de Barros Vilas Bôas; Deivid Medeiros da Costa; Camila Lisarb Velasquez Bastolla; Daína Lima; Marilia Tedesco; Tamiris Henrique Ferreira; Pietro Sinigaglia Lunelli; Antonio Pedro Novaes de Oliveira; Afonso Celso Dias Bainy; Diego José Nogueira

doi:10.1016/j.marenvres.2024.106433

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Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).

Marine environmental research 2024

Layse Rodrigues do Rozario Teixeira Lins, Miguel Saldaña-Serrano, Carlos Henrique Araújo de Miranda Gomes, Mariana Rangel Pilotto, Luiz Otávio de Barros Vilas Bôas, Deivid Medeiros da Costa, Camila Lisarb Velasquez Bastolla, Daína Lima, Marilia Tedesco, Tamiris Henrique Ferreira, Pietro Sinigaglia Lunelli, Antonio Pedro Novaes de Oliveira, Afonso Celso Dias Bainy, Diego José Nogueira

Summary

Researchers exposed the oyster Crassostrea gasar to environmentally sourced polyester microfibers at 0.5 mg/L and found accumulation in gill and digestive gland tissues, with evidence of clearance after a depuration period, raising concerns about microfiber effects on bivalve aquaculture.

Body Systems

Digestive Immune

Models

Invertebrate other

The study aimed to obtain environmentally relevant microfibers (MFs) from polyester fabric and assess their impact on the oyster Crassostrea gasar. MFs were obtained by grinding the fabric, and their accumulation in oysters gills and digestive glands was analyzed after exposure to 0.5 mg/L for 2 and 24 h. Additionally, a 48 h depuration was conducted on the oysters exposed for 24 h. Sublethal effects were assessed in oysters exposed for 24 h and depurated for 48 h, using biomarkers like Catalase (CAT), Glutathione S-transferase (GST), and Glutathione Peroxidase (GPx), along with histological analyses. Polyester fabric grinding produced significant MFs (average length: 570 μm) with degraded surface and increased malleability. Oysters showed increased MF accumulation in digestive glands post-exposure, with no impact on antioxidant enzymes. Depuration decreased MFs accumulation. Histological analysis revealed accumulation in the stomach and brown cells, possibly indicating inflammation. This raises concerns about MFs bioaccumulation in marine organisms, impacting the food chain and safety.

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