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- W2256757516 abstract "Breeding populations of Great Tit Parus major and Pied Flycatcher Ficedida hypoleuca was studied to determine radionuclide ({sup 137}Cs, {sup 90}Sr) concentrations in bodies and foods (contents of gastrointestinal tracts) at different stages of the life-cycle and radiation effects upon the populations. The study was carried out in 1989--1992 near Chernobyl (in two areas with differed contamination levels: 90 Ci/km{sup 2}, 5 Ci/km{sup 2}) and East-Ural radioactive trace (Russia) (1,500 Ci/km{sup 2}, 2 Ci/km{sup 2}). Concentrations of {sup 90}Sr in egg shells of Great Tit collected near Chernobyl were 65 times higher in the more radioactive area than in the less contaminated area and varied from 56.6 to 79.7 Bq/g. Concentration of {sup 90}Sr in the contents of gastrointestinal tracts were from 0 to 10.8 Bq/g. Concentrations of radionuclides in the food increased in the sequence ``nestlings < fledglings < adults``. However, the accumulation declined from nestlings to adults. {sup 90}Sr content in bodies of nestlings varied from 1 to 5 Bq/g at contaminated site and from 0.2 to 0.5 Bq/g at less polluted area, from 1 to 9 Bq/g and from 0.1 to 0.5 Bq/g in fledglings relatively in two areas. It was assumed that the ration of pairsmore » numbers and breeding success of Pied Flycatcher (East-Ural) on the control site was significantly higher than that on contaminated site. The pathology in development of Pied Flycatcher`s nestling was recorded. The radiation influenced on age-structure of bird populations decreasing the ratio of the young.« less" @default.
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- W2256757516 date "1995-12-31" @default.
- W2256757516 modified "2023-09-23" @default.
- W2256757516 title "Patterns of radionuclide concentrations in life-cycle of birds" @default.
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