TY - GEN N1 - Bibliogr.: p. 255-257 N1 - P. 245-264 : ill. ; 25 cm N1 - Abstract in Polish. Taxa in Latin N2 - The research was carried out on 100 water bodies, from 1998 to 2000. There were 87 water reservoirs located in the area of Białystok, another 13 reservoirs were located in the Białystok surroundings, but outside the administrative boundaries (up to 2.5 km away). Several physical features of the breeding ponds in our study as well as their surroundings were described to determine the urbanization pressure in a given area. The frequency of occurrence of particular amphibian species and their number were determined. In the study area, amphibians belonging to 12 species (with one genetic hybrid) were found. Due to problems identifying “green frogs”, they were put into one group for most of analyses. The most frequent amphibians within the administrative boundaries of Białystok were: the “green frogs” (observed in 66.6% of studied water bodies), the common frog (65.5%) and the moor frog (49.4%). These species occurred throughout the entire city. The rarest amphibian species were observed only on the outskirts of Białystok. They were: the crested newt (2.3%) and the natterjack (3.4%). The green toad is considered to be a species less sensitive to urbanization pressure. Paradoxically, it was rarely found in Białystok (9.2%) and only22.2% of its breeding sites were located in the city centre. L1 - http://rcin.org.pl/miiz/Content/36761/PDF/WA058_53145_P256-T53_Frag-Faun-Nr-2.pdf M3 - Text J2 - Fragmenta Faunistica, vol. 53, no. 2 J2 - Płazy Białegostoku PY - 2010 IS - 2 EP - 264 KW - Amphibia KW - amphibians KW - Poland KW - Białystok (region) KW - urban populations KW - man's impact KW - effect of human beings KW - breeding ponds A1 - Chętnicki, Włodzimierz A1 - Siwak, Paweł A1 - Mazgajska, Joanna A1 - Mazgajski, Tomasz D. A2 - Polska Akademia Nauk. Muzeum i Instytut Zoologii PB - Museum and Institute of Zoology, PAS VL - 53 CY - Warszawa SP - 245 T1 - Amphibians of Białystok UR - http://rcin.org.pl/miiz/dlibra/publication/edition/36761 ER -