Cateel, Philippines — Microplastics are no longer just a marine pollution issue. They are now entering the human food chain through seafood consumption, according to a new study by Rosemie Q. Siarot and Eleanor M. Vilela from Davao Oriental State University, published in 2026 in the East Asian Journal of Multidisciplinary Research.
The study examined three economically important fish species commonly sold in Cateel, Davao Oriental, and found microplastic contamination in all of them.
Researchers analyzed Tulingan (Euthynnus affinis), Matang-baka (Selar crumenophthalmus), and Bawo/Balo (Tylosurus crocodilus), which are widely consumed by local communities.
A total of 122 microplastic particles were identified. Bawo/Balo recorded the highest contamination with 52 particles, followed by Matang-baka with 51, and Tulingan with 19.
All detected microplastics were fibers, suggesting that fishing nets, ropes, synthetic textiles, and domestic wastewater are the likely major sources.
Blue microplastics were the most common, accounting for 30.08 percent, followed by black and red. FTIR analysis also revealed that polyamide, commonly found in nylon materials, was the dominant polymer.
The researchers also surveyed the community’s knowledge, attitudes, and practices regarding microplastic pollution. Results showed strong awareness, positive attitudes, and proactive environmental practices.
According to Siarot and Vilela, the findings serve as an urgent warning. Even if contamination levels remain relatively low, the consistent presence of microplastics confirms that marine pollution has already entered the food chain.
The study emphasizes the need for stronger waste management systems, reduced plastic consumption, and continued environmental education to protect both marine biodiversity and human health.
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