The influence of season on mercury metabolism in bream (Abramis brama l.)
1997
Zarski, T. | Zarska, H. | Sokol, J. (Warsaw Agricultural Univ., Warsaw (Poland). Dept. of Animal Hygiene) | Beseda, I. | Valka, J.
In fish, as opposed to terrestrial animals and man, the main tissues accumulating mercury are skeletal muscles. It is thus most probable that the element will be differently distributed and that the proportions between concentrations in particular organs following intensive preying (autumn) and after winter limited food intake (spring) will vary. The present investigation was aimed at confirming the above hypothesis. The investigations were performed on 20 breams caught in October and the following May. The content of mercury in the muscles, hepato-pancreas, kidney, gills and intestine was determined by the ASA method. It was demonstrated that seasons did not significantly affect the concentration of mercury in the tissues and organs of bream. In autumm, following intensive preying, Hg metabolism is more dynamic than in spring. Results indicate that mercury enters the muscles mainly through gill absorption
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