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Contaminação Por Microplásticos Em Fígado De Peixes Iliófagos Em Um Rio Urbanizado De Clima Subtropical No Sul Da América Do Sul
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Researchers detected microplastics in the livers of 54 Cyphocharax voga fish from the urbanized Rio dos Sinos in southern Brazil, finding no significant association between microplastic concentration per gram of hepatic tissue and the fishes' body condition factor.
RESUMO Os microplásticos (MPs) foram detectados em uma variedade de ecossistemas, incluindo os ambientes atmosféricos, aquáticos e terrestres, sendo encontrados também nos órgãos e sistemas dos organismos que habitam esses ambientes. Entretanto, pouco se sabe sobre os reais danos causados na saúde dos vertebrados, incluindo os humanos. Diante disso, o presente estudo investigou a presença de MPs no fígado de 54 peixes da espécie Cyphocharax voga do Rio dos Sinos, um rio urbano situado no sul da América do Sul. Explorou a relação entre a concentração de MPs e o fator de condição (Kn) dos peixes, revelando não haver associação significativa entre a concentração média de MPs por grama de tecido hepático e o fator de condição Kn. A análise destaca a complexidade das interações entre MPs e organismos aquáticos, enfatizando a necessidade de avaliações abrangentes dos riscos e impactos dos microplásticos em ecossistemas aquáticos.
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Researchers examined microplastic contamination in freshwater fish, integrating global trends with regional evidence from Brazil to assess the prevalence and significance of microplastic ingestion across aquatic ecosystems and freshwater biodiversity.
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Researchers analyzed microplastics in the gastrointestinal tracts of Metynnis maculatus fish from the Moxotó Reservoir in Brazil, collecting 68 microplastic particles across seven sampling periods, with blue filaments predominating and higher abundances observed during the rainy season in May.
Evaluation of Microplastic Pollution in Gills of Freshwater Fish in a Neotropical Hydrographic Basin, Brazil
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Analysis of gill tissue from 98 freshwater fish across eight species in Brazil's Sorocaba River basin found microplastics in every individual, with fibers comprising 74% of the 385 particles detected and highest contamination in the most disturbed river. The universal gill contamination across species demonstrates that freshwater fish in human-impacted watersheds serve as a direct route for microplastic entry into aquatic food webs and ultimately human diets.
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This Brazilian thesis investigates microplastic ingestion and its effects on fish from the Amazon basin, one of the world's most biodiverse freshwater systems. Given that aquatic organisms in even remote areas are exposed to microplastics, the research highlights risks to Amazon fish diversity and the potential for microplastics to disrupt aquatic food webs in previously pristine ecosystems.
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