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Research Articles

Trace Metal Contents in Muscle Tissues of Inland Fish Species in the North Central Province of Sri Lanka

Authors:

BKKK Jinadasa ,

Institute of Post-Harvest Technology, National Aquatic Resources Research and Development Agency (NARA), Crow Island, Mattakuliya, Colombo 15, LK
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MM Subasinghe,

Department of Food Science and Technology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, LK
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K Thayalan,

Department of Food Science and Technology, Faculty of Livestock Fisheries and Nutrition, Wayamba University of Sri Lanka, Makandura, Gonawila, LK
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I Wickramasinghe,

Department of Food Science and Technology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, LK
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MSW de Silva

Department of Food Science and Technology, Faculty of Livestock Fisheries and Nutrition, Wayamba University of Sri Lanka, Makandura, Gonawila, LK
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Abstract

Chronic Kidney Disease (CKD) has recently shown a remarkable increase in some areas in the North Central Province (Anuradhapura and Polonnaruwa districts), Sri Lanka. The consumption of fresh water fish contaminated with trace metals is considered as a possible causal factor for this. The concentration of mercury (Hg), lead (Pb), cadmium (Cd), chromium (Cr), copper (Cu), cobalt (Co), zinc (Zn), iron (Fe) and arsenic (As) in the muscle tissues of the five commonly consumed freshwater fish species, Oreochromis spp., Heteropneustes fossilis, Glossogobius giuris, Channa striata and Macrognathus aral were determined using Atomic Absorption Spectrophotometry (AAS). This study indicates that toxic metals’ Hg, Cd and Pb were detected in very low concentration in muscle tissues and the recorded values were lower than the maximum permissible level (Hg< 0.5 mg/kg, Pb< 0.2 mg/kg and Cd< 0.05 mg/kg) established in Sri Lanka. The amount of fish that would fulfil the weekly protein requirement of an average child and adult was calculated according to the WHO guidelines. The calculated levels of contamination by Hg, Pb, Cd, As, Cu, Zn, Cr and Fe in the quantity of fish needed to fulfil the protein requirement was lower than the Provisional Tolerable Weekly Intake (PTWI) value established by WHO, EU and FAO and none of above guidelines not covered the level of Co.

DOI: http://dx.doi.org/10.4038/cjsbs.v42i2.6611

Ceylon Journal of Science (Bio. Sci.) 42(2): 79-86, 2013

DOI: http://doi.org/10.4038/cjsbs.v42i2.6611
How to Cite: Jinadasa, B. et al., (2014). Trace Metal Contents in Muscle Tissues of Inland Fish Species in the North Central Province of Sri Lanka. Ceylon Journal of Science (Biological Sciences). 42(2), pp.79–86. DOI: http://doi.org/10.4038/cjsbs.v42i2.6611
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Published on 21 Feb 2014.
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