Agriculture & Food, Volume 1, 2013

Streszczenie: Breeding salmonid fishes is in the Czech Republic widespread in areas with mountain climatic conditions. Our study is focused on the metals Cd, Pb and Hg in muscle of brook charr (Salvelinus fontinalis) from the fish breeding in location of the upper trout stream of the Králický potok. The area is located above the urban agglomeration and industrial premises, where we did not anticipate any ecological burden of contaminating metals. The results are compared with the contents of metals in muscle of the naturally occurring brook trout (Salmo trutta m. fario L.) from the lower part of the same stream from the site of under the industrial complex and urban agglomeration. The results of the metal content in fish muscle from both locations are compared with the hygienic limit valid in the Czech Republic. The average values of all the analyzed metals in muscle of the brook charr did not exceed the hygienic limits for these metals (Cd < 0.003 mg/kg, Pb = 0.063 mg/kg, Hg= 0.283 mg/kg ± ). In three samples of the brook charr the limit was exceeded for mercury (Hg 1.21 mg/kg). In the muscle of brown trout, the average concentrations of all analyzed metals complied to the hygienic limits (Cd < 0.003 mg/kg, Pb = 0.14 mg/kg, Hg = 0.19 mg/kg ± ). In none of the sample was the limit for metals exceeded, only in one case, Pb from location L2. Higher found values for mercury in the brook charr may be related to the earlier environmental burden, other character of the locality and higher age of the fish.