ANALYSIS OF MICROPLASTIC ABUNDANCE IN THE DIGESTIVE TRACT OF FISH CAUGHT BY FISHERMEN IN THE PANGEMPANG WATERS OF EAST KALIMANTAN PROVINCE
Authors
Muhammad Reza Rachman , Ristiana Eryati , Irwan Ramadhan RitongaDOI:
10.29303/jp.v15i5.1789Published:
2025-10-25Issue:
Vol. 15 No. 5 (2025): JURNAL PERIKANANKeywords:
Fish, Carnivores, Microplastics, Muara Badak, OmnivoresArticles
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Abstract
Microplastics are pollutants measuring less than 5 mm in size that are commonly found in
sediments, water bodies, and aquatic biota. Microplastics can enter the bodies of marine
biota, including fish. When fish are exposed to microplastics and consumed by humans in
excessive amounts, this may affect human health. This study aims to analyse the types and
abundance of microplastics in the digestive tracts of fish caught by fishermen in the waters of
Pangempang, Muara Badak, East Kalimantan. The relationship between fish size and
microplastic content is also investigated in this study. Fish samples consisted of six fish
species (milkfish, baronang, gerot-gerot, snapper, kue, and trakulu) collected using random
sampling. Microplastic analysis was conducted through organic destruction with H2O2 and
FeSO4, followed by microscopic identification. It was found that all fish digestive tracts
contained microplastics, with the dominant type being fibres (97.4%), followed by films and
fragments. Baronang fish had the highest microplastic abundance (11.0 particles/individual),
while mangrove snapper had the lowest (2.33 particles/individual). The average abundance in
omnivorous (8.125 particles/individual) was higher than carnivorous (5.2
particles/individual). There was a very weak correlation between fish size (length and weight)
and microplastic abundance (r<0.3; p>0.05 in omnivores, p<0.05 in carnivores).
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