The relationship between the mercury concentration in fish muscles and scales/fins and its significance |
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Authors: | Rostislav Červenka Antonín Bednařík Josef Komárek Markéta Ondračková Pavel Jurajda Tomáš Vítek Petr Spurný |
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Institution: | 1.Faculty of Science, Department of Chemistry,Masaryk University,Brno,Czech Republic;2.Institute of Vertebrate Biology,Academy of Science of the Czech Republic,Brno,Czech Republic;3.Department of Zoology, Fisheries, Hydrobiology and Apiculture,Mendel University,Brno,Czech Republic |
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Abstract: | The determination of mercury in fish typically involves analysis of muscles. For predicting the concentration of mercury in
fish muscle on the basis of the analysis of fish scales or fins, the relationship between total mercury concentrations in
fish muscles and in fish scales and fins was studied. Mercury content in fish muscles, scales and fins was determined by atomic
absorption spectrometry with thermal decomposition of the sample in a flow of oxygen. A number of scale treatments were applied
in order to remove impurities and to enhance the prediction quality. For scale treatment, 40 min of washing with DI water
in an ultrasonic bath is recommended. A coefficient of determination r2= 0.93 for the relationship between Hg concentrations in muscles and scales was achieved for 40 fish among the different fish
species tested (European bream, perch, roach) from the Hamry Reservoir, Czech Republic. With respect to fin sampling, the
coefficient of determination r2 for these fish was 0.86. The analysis of fish scales and caudal fins is a useful screening tool for assessing the relative
mercury contamination of monitored fish. The method of sampling scales is not suitable for fish species with small scales
such as brown trout.
![MediaObjects/11532_2011_105_Fig1_HTML.jpg](/content/24426332312QGQ32/MediaObjects/11532_2011_105_Fig1_HTML.jpg) |
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