Investigation of Occurrences of Mercury Level in Tuna Fesh (Thunnus albacares) in Relation to it Habitat and Size Variation

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dc.contributor.author Weththasinghe, M.P.
dc.contributor.author Abeyrathne, E.D.N.S.
dc.contributor.author Jayamanne, S.C.
dc.contributor.author Karunarathne, B.
dc.date.accessioned 2021-12-01T09:48:09Z
dc.date.available 2021-12-01T09:48:09Z
dc.date.issued 2010
dc.identifier.isbn 9789550481002
dc.identifier.uri http://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/7815/33-25601~1.pdf?sequence=1&isAllowed=y
dc.description.abstract Mercury is poisonous to human being and the level of mercury in fish is regarded as high when it exceeds 0.3 ppm. Mercury level is a hazard point in fish processing and finding ways in reducing the hazards of mercury is important for export market. In this study, distribution of mercury in yellowfin tuna in relation to its habitat and size was investigated. Three hundred and sixty samples of fish were collected from 120 individuals from four fish landing sites; Galle, Trincomalee, Dondra, and Negombo. From each fish three samples were collected from head, underneath the pectoral fin and tail end respectively. Mercury content in each part was analysed using Atomic Absorption Spectroscopic method. Total mercury levels in four landing sites; Galle, Trincomalee, Dondra, and Negombo ranged from 0.0733 ppm to 0.2225 ppm with reference to yellowfin tuna. Highest mean mercury level (0.1668 ppm) and highest variation of mercury (±0.0327) was recorded at L.ondra. The lowest mean mercury level (0.1048 ppm) was recorded at Galle. Mercury level in tuna harvested from eastern coast of Sri Lanka was significantly higher than the mercury level in tuna harvested from western coast. This suggests that mercury gets distributed through oceanic currents. Weight and mercury level of tuna showed a positive correlation (R2 = 0.123) while fork length of fish and mercury level of fish has shown a negative correlation (R2 = 0.123). Body location of the fish has no significant effect on the deposition of mercury in tuna. Keyword: Mercury level, Yellowfin tuna, Landing site, Body location, Weight en_US
dc.language.iso en en_US
dc.publisher Uva Wellassa University of Sri Lanka en_US
dc.subject Animal Sciences en_US
dc.subject Aquaculture and Fisheries en_US
dc.subject Aquatic Resources en_US
dc.subject Fish en_US
dc.title Investigation of Occurrences of Mercury Level in Tuna Fesh (Thunnus albacares) in Relation to it Habitat and Size Variation en_US
dc.title.alternative Research Symposium 2010 en_US
dc.type Other en_US


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