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Lead and cadmium content in the meat tissues of fish from water ecosystems in the vicinity of a pesticide tomb

Skibniewska K.A., Guziur J., Marzec Z., Zaręba S., Grzybowski M., Szarek J.

Oceanological and Hydrobiological Studies

2008

Vol. 37, No.3

79-86

Lead and cadmium levels were determined in the meat tissues of roach, bream, and carp netted in a lake and in fish ponds threatened by a pesticide tomb and in control basins in northeastern Poland. Concentrations in roach ranged from 20 to 124 ěg kg-1 of Pb and from 1 to 19 ěg kg-1 of Cd. In bream they were from 4 to 280 ěg kg-1of Pb and 2 to 28 ěg kg-1 of Cd, while in carp they were from 9 to 82 ěg kg-1 of Pb and 2 to 260 ěg kg-1 of Cd. The metal concentrations were low; no result exceeded admissible residue levels set forth by Polish law, and no evident contamination of fish by leakage from the pesticide tomb was detected.

An attempt to determine the share of zooplankton in food consumed by fish in the limnetic zone of a eutrophic dam reservoir

Pociecha A., Amirowicz A.

Oceanological and Hydrobiological Studies

2003

Vol. 32, No. 2

15-31

Zooplankton was the only food component of common bream and silver bream, and the main food component of roach and bleak in the pelagic zone of the Dobczyce Reservoir (southern Poland) from April to October 1994. Cladocera and Copepoda constituted 67.9% of the food consumed by the whole fish community. The average size of eaten individuals ranged from 0.62 to 1.43 mm. Planktivorous fishes selected phytoplankton-controlling filtrators, mainly large Daphnia species, which were eliminated most effectively in the summer.