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The occurrence of microplastics in the gastrointestinal tract of demersal fish species

By: Berna Cris C. Gomez, Bernard C. Gomez, Adzel Adrian G. Baldevieso, Florie May O. Escalante

Key Words: Microplastics, Stomach content, Frequency of occurrence, Condition Factor, Ingestion.

Int. J. Biosci. 16(6), 152-162, June 2020.


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The study aimed to quantify and qualify the microplastics in the gastrointestinal tract contents of the six (6) dominant demersal fish species, determining the percentage frequency of occurrence and the condition factor.  Out of 180 fish individuals examined, 21 samples (11.67 % of the total samples) have microplastics in their gastrointestinal tracts.  The microplastics observed were fibers which occur the most (count = 22; %FO = 78.57 %), followed by microbeads (count = 5; %FO = 17.86 %) and rubber (count = 1; %FO = 3.57 %). The Spangled Emperor, L. nebulosus, was the highest consumption of 13 (46.43 %) fiber and 1 (3.57 %) microbeads in the stomach. No microplastic in the stomach of the Brown-stripe Snapper, L. vitta. The fish samples without microplastics ingestion differ significantly from fish with microplastics in the stomach. The fish samples without microplastics ingestion displayed a good and well-proportioned fish, while fish with microplastics is as a poor fish, long and thin.

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The occurrence of microplastics in the gastrointestinal tract of demersal fish species

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Berna Cris C. Gomez, Bernard C. Gomez, Adzel Adrian G. Baldevieso, Florie May O. Escalante.
The occurrence of microplastics in the gastrointestinal tract of demersal fish species.
Int. J. Biosci. 16(6), 152-162, June 2020.
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