Analysis of Microplastic Abundance in Fish Landed from the Waters of South Leato Sea

Authors

  • Moh. R. Darise Gorontalo State University
  • Weny J. A. Musa Gorontalo State University
  • Hendri Iyabu Gorontalo State University
  • Wiwin R. Kunusa Gorontalo State University
  • Erni Mohamad Gorontalo State University

DOI:

https://doi.org/10.22487/j24775185.2026.v15.i2.pp111-120

Keywords:

Fish, Fourier Transform Infrared Spectroscopy (FT-IR), microplastics

Abstract

Microplastics are plastic particles smaller than 5 mm, formed by the degradation of plastic materials in aquatic environments and potentially contaminating marine biota. This study aimed to investigate the presence of microplastics in fish caught. It landed in the waters of the South Leato Sea and to identify their physical characteristics and constituent polymer types. The research samples consisted of four fish species, namely skipjack tuna (Katsuwonus pelamis), scad (Decapterus macrosoma), deho (Euthynnus affinis), and oci (Selaroides leptoleptis), with the analyzed parts being the gastrointestinal tract and muscle tissue. Microplastic analysis was conducted using the National Oceanic and Atmospheric Administration (NOAA) method, which included Wet Peroxide Oxidation (WPO) for the degradation of organic matter, density separation for particle separation based on density, microscopic identification to determine the morphology and abundance of microplastics, and Fourier Transform Infrared (FTIR) spectroscopy analysis to identify the constituent polymer types. The results showed that the identified microplastics were categorized into three morphological forms: fibers, fragments, and films. Based on polymer analysis, the detected microplastics were predominantly composed of polyamide (nylon). The highest abundance was observed in gastrointestinal tract samples from oci and scad fish, at 0.6 particles per individual. In contrast, the lowest abundance was observed in skipjack tuna, at 0.2 particles per individual. These findings indicate variations in microplastic contamination levels among the fish species examined. This study provides important implications for understanding the extent of microplastic pollution in edible fish from the South Leato Sea and may serve as a scientific basis for environmental quality monitoring and mitigation efforts to reduce the risks of microplastic contamination in the food chain and human health.

Author Biographies

Moh. R. Darise, Gorontalo State University

Chemistry Study Program/FMIPA

Weny J. A. Musa, Gorontalo State University

Chemistry Study Program/FMIPA

Hendri Iyabu, Gorontalo State University

Chemistry Study Program/FMIPA

Wiwin R. Kunusa, Gorontalo State University

Chemistry Study Program/FMIPA

Erni Mohamad, Gorontalo State University

Chemistry Study Program/FMIPA

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Published

2026-05-20

How to Cite

Darise, M. R., Musa, W. J. A., Iyabu, H., Kunusa, W. R., & Mohamad, E. (2026). Analysis of Microplastic Abundance in Fish Landed from the Waters of South Leato Sea. Jurnal Akademika Kimia, 15(2), 111–120. https://doi.org/10.22487/j24775185.2026.v15.i2.pp111-120

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