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Microplastics in fishes as seabird preys in Jakarta Bay Area
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Microplastics were detected in five fish species collected from Jakarta Bay, Indonesia, with fishes serving as prey for little-black cormorants, indicating that microplastic contamination enters seabird food webs through fish prey in Indonesian coastal waters.
Abstract There has been some growing research on plastics in fishes as human food in Indonesia, but none linked to fishes as seabirds’ prey. The objective of this research was to reveal whether there were microplastics in fishes as prey of little-black cormorant. The study site was the coastal area of Pulau Rambut Wildlife Sanctuary in Jakarta Bay, where the cormorants search for fish food. Fish samples (12-16.8 cm, 5 species; n=8) were collected by using fish-rod, at the usual fishing area of cormorants along the southern coast of the reserve. Gastrointestinal tracts of the samples were observed to find macro, meso and microplastic. After NaCl dilution, followed by observation using SRCC and microscope (10×10 magnification), followed by grouping based on type, color, and size. No macro or mesoplastic found. Total of 110 microplastics particles were found from all samples ( range 7-26 particles/fish), with Lutjanus vitta having the highest number (15-26 particles/fish). Film (2-21 particles/fish) and fiber (1-10 particles/fish) were found, but no fragment. Transparent microplastics were found the most (57.3%), followed by blue (26.4%), black (10.0%), and red (6.4%). The size of the microplastic found were mostly (64.5%) between 100-1.000μm. A more intensive research is needed, as these sampled fishes might also consumed by human.
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Microplastics in Digestive System of Little-black cormorant (Phalacrocorax sulcirostris) in Pulau Rambut Sanctuary
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Researchers examined microplastic contamination in the digestive system of Little-black cormorants (Phalacrocorax sulcirostris) at Pulau Rambut Wildlife Sanctuary in Jakarta Bay, detecting 16 microplastic particles per sampled bird (estimated 320 particles/bird) with film-type particles dominant (75%) and sizes mostly between 100-1000 micrometers.
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Researchers examined the digestive tracts of multiple fish species from Jakarta Bay, Indonesia, finding microplastics — primarily fragments and fibers — in a significant proportion of individuals. The results document widespread contamination in a heavily urbanized coastal environment and raise concerns about plastic accumulation through the seafood chain.
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Microplastics were found in the gastrointestinal tracts of two fish species with different feeding habits caught in Jakarta Bay, Indonesia, with both herbivorous parrotfish and carnivorous threadfin bream affected. The findings indicate that microplastic ingestion in Jakarta Bay fisheries is widespread across the food chain, with implications for seafood safety in the region.
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Researchers assessed microplastic accumulation in the gut and gill tissues of six economically important fish species from Jakarta Bay and Cirebon Bay in Indonesia. They found microplastics present in all samples, with variations in abundance and polymer type across species and locations. The study raises concerns about the potential transfer of microplastics to human consumers through commercially harvested fish in the Java Sea region.
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Commercial fish from nine species collected at the Pantai Indah Kapuk coast in Jakarta were dissected for microplastics, with 97.13% of 174 fish containing an average of ~12 particles per individual dominated by fibers and fragments of PE, PP, and PS. The study documents near-universal microplastic contamination in urban coastal fisheries in Indonesia with implications for seafood consumers.
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