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Microplastics ingestion by blue panchax fish (Aplocheilus sp.) from Ciliwung Estuary, Jakarta, Indonesia
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Blue panchax fish from Jakarta's Ciliwung Estuary had microplastics in 75% of sampled individuals at 1.97 items per fish, with the smallest size class (300–500 µm) most common inside fish — a size overlap with their prey that may explain the difficulty in avoiding ingestion.
Plastic pollution has a detrimental effect on marine environments, and there is limited information regarding its ingestion by biota, which is the primary consumer. Therefore, this research aims to assess microplastic ingestion by blue panchax fish (Aplocheilus sp.). To achieve this, microplastics were extracted and identified from Ciliwung estuary, coastal waters in North Jakarta, and the Aplocheilus sp. Its various forms and sizes were found in river flow (9.37 ± 1.37 particles/m), coastal waters (8.48 ± 9.43 particles/m), and in 75% samples of Aplocheilus sp. (1.97 particles/individual). The microplastic size which was of highest concentration in Aplocheilus sp. was relatively small, ranging from 300 to 500 μm. This small size indicates that the fish has difficulty in distinguishing between their food and the microplastics. Further, there was a possibility of the absorption of other pollutants by the plastics. Therefore, an in-depth study on the effects of plastic ingestion on aquatic life, biomagnification, exposure, chemical toxicity, and socio-economy is recommended.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.