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Microplastics (MPs) have become a global concern due to their pervasive presence in the environment, originating largely from discarded plastic fragments.These particles, smaller than 5 mm, may come from various sources including cosmetics, clothing fibers, and tire particles, posing a significant threat to aquatic life and human health.This study focused on the potential presence and ingestion of MPs by Nile tilapia (Oreochromis niloticus) cultured in the Magat Dam Reservoir in Ramon, Isabela, Philippines. The research aimed to determine the presence, type, shape, and color of MPs in Nile tilapia, considering the ecological and health implications of microplastic pollution in aquatic ecosystems and food sources. Sampling was conducted in three distinct zones of the reservoir-upper, middle, and lower. MPs were extracted from their gastrointestinal tracts of the sample fishes using the Wet Peroxide Oxidation technique. The MPs were characterized in terms of type, shape, and color using established criteria. Statistical analysis, employing One -Way Analysis of Variance (ANOVA), was conducted to discern differences in MP distribution across sampling areas. Results indicate a significant prevalence of fiber in the guts of Nile tilapia, suggesting its potential as a significant pollutant in the reservoir. MPs exhibited various shapes including elongated, angular, cylindrical, and degraded, with elongated fibers dominating the gastrointestinal tracts. The color spectrum of MPs ranged from white to black, with transparent MPs being the most abundant. This study underscores the urgent need for mitigation strategies to address microplastic pollution in aquatic environments, emphasizing the importance of sustainable practices to preserve both marine ecosystems and human health. Additionally, it contributes to the fulfillment of Sustainable Development Goals 6 and 14, advocating for clean water, sanitation, and the protection of life below water.
Eugene M Lina (Fri,) studied this question.