期刊
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
卷 102, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.etap.2023.104250
关键词
Microplastic; Exposure; Walking catfish; Hemato-biochemistry; Histopathology; Growth
Fish at different trophic levels are affected differently by the presence of microplastic (MP) and their ingestion. In this study, walking catfish (Clarias batrachus) were exposed to two types of MP for 60 days. The results showed changes in hematological indices as well as morphological alterations in the liver, kidney, intestine, and gills. Additionally, the growth of C. batrachus was significantly retarded. This suggests that widespread MP pollution in water bodies in Bangladesh may pose serious ecological risks to bottom-feeding fish.
Fish inhabiting various trophic levels are affected differently as the presence of microplastic (MP) in the water column and their ingestion by fish varies. Walking catfish (Clarias batrachus) inhabits the bottom of the water bodies. To understand the effects of MP, we exposed C. batrachus to two types of MP - polyethylene terephthalate (PET) and low-density polyethylene (LDPE) for 60 days. After exposure, hematological indices, mainly red blood cells and hemoglobin levels decreased, and white blood cells increased significantly compared to the control group (p < 0.05). A significant increase in the levels of blood urea and glucose was observed, and serum glutamic pyruvate transaminase and serum glutamyl oxaloacetic transaminase activity remained elevated (p < 0.05). Histopathological examination of the liver, kidney, intestine, and gills showed morphological alterations. Moreover, MP exposure caused growth retardation (p < 0.05) in C. batrachus. Widespread pollution of water bodies by MP may impose serious ecological risks to bottom-feeding fish in Bangladesh.
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