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Changes in Hematological Parameters and Plasma Components of Olive Flounder, Paralichthys olivaceus, Following Acute Microplastic Exposure
Original title: 넙치, Paralichthys olivaceus 의 미세플라스틱 급성 노출에 따른 혈액성상 및 혈장성분의 변화
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This Korean-language study exposed juvenile olive flounder to polyethylene microplastics at different concentrations for 96 hours and measured blood chemistry changes. Microplastic exposure decreased blood calcium levels without causing death, suggesting sublethal physiological effects at environmentally relevant concentrations. Flounder is an important aquaculture species in Korea, making contamination data relevant to both food safety and fish health.
Juvenile olive flounder, Paralichthys olivaceus (mean weight 66.7±7.1 g; mean length 19.2±0.9 cm) in a bio-floc environment were exposed to microplastic (PE: polyethylene, size 40-48 μm) at 0, 4, 20, 100, 500 and 2,500 mg L-1 for 96 hours. No P. olivaceus deaths were observed following microplastic exposure. In the plasma components, calcium was significantly decreased whereas there was no significant change with magnesium following microplastic exposure. Glucose was significantly decreased with over 100 mg L-1 at 48 hours and 20 mg L-1 at 96 hours. Cholesterol was significantly decreased with over 20 mg L-1 after 48 hours, whereas there was no significant change in the total protein content. In enzymatic plasma components, the AST (Aspartate aminotransferase) was significant decreased by microplastic exposure. The results of this study indicate that acute exposure to microplastic induces blood physiological changes in P. olivaceus.
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