Miroslaw Szczepkowski

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Pikeperch were induced to spawn 3 months prior to the natural spawning period through photothermal and hormonal stimulation. Females (five specimens in each group) were stimulated with injection of human chorionic gonadotropin (hCG) once (200 IU kg−1), twice (200 IU kg−1, second dose after 48 h–400 IU kg−1) or three times (200 IU kg−1, after 24 h–200 IU(More)
Human-induced hybridization between previously allopatric species deserves special attention from conservationists. The European whitefish (Coregonus lavaretus), native fish species in Poland, hybridizes with another coregonid fish—peled (Coregonus peled) due to artificial fertilization in the hatcheries. The latter species is native to Siberian waters and(More)
The results of the works on the international project for the Baltic sturgeon restoration in the basin of the Neman River are considered. The mutual goal of the project is the restoration of the Baltic sturgeon population in its whole former area in the Baltic Sea. Successful works on the restoration of the Baltic sturgeon population are conducted in the(More)
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