SEASONAL VARIATION OF HEAVY METAL RESIDUES IN SOME FISH FROM RICE FISH FARM OF WEST TARPET VILLAGE, MAUBIN TOWNSHIP
Abstract
- Rice fish farming system experimental trials in Myanmar‟s Ayeyarwady Delta started in 2017. Fish from rice fish farms and paddy fields are supply nourishment of local people. Bioaccumulation of heavy metals in fish causes serious threats to human when they are consumed. This study focused on the seasonal variation of heavy metal concentrations (Arsenic (As), Cadmium (Cd) and Lead (Pb) in muscle tissues of six fish species (Catla catla, Labeo rohita, Puntius gonionotous, Puntius chola, Mystus pulcher and Channa striata) cultured in the rice-fish farm and paddy fields located at West Tarpet Village, Maubin Township. Seasonal variation of metal concentrations in water and soil were also investigated separately from paddy field fish and rice-fish farm fish from June 2022 to May 2023. The levels of metal concentration varied depending on the season and the different fish species. The highest concentrations of As and Cd were found in Puntius chola and Mystus pulcher during the rainy season in paddy field. However, these values were not over the maximum permissible limit and guide line limit of WHO and FAO. The concentration of Pb in Labeo rohita was high during the rainy season and it exceeded the permissible limit. Cd and Pb concentrations in water samples were found to over the maximum permissible limit during the rainy season. The values of As concentrations in water samples were not over permissible limit in all seasons. The concentrations of As, Cd and Pb in soil sample were recorded beyond the acceptable limit. The values of heavy metal concentrations observed for all fish species except Labeo rohita, did not exceed the acceptable limits set by WHO/FAO (2011). While certain species showed elevated levels during the rainy season, all fish remained within acceptable limits set by WHO/FAO standards, highlighting the importance of ongoing environmental monitoring for sustainable aquatic ecosystems.
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Year
- 2025
Author
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Soe Myint Khine1, Cho Cho Thin2, Kay Lwin Tun3
Subject
- Zoology, Marine Science, Environment of Water Studies
Publisher
- Myanmar Academy of Arts and Science (MAAS)