Zmienność składu pokarmu miejskich pustułek w Warszawie w zależności od warunków pogodowych w sezonie pozalęgowym ; Cold-season diet of urban Kestrels
Museum and Institute of Zoology, Polish Academy of Sciences
Museum and Institute of Zoology, Polish Academy of Sciences ; Natura Optima Dux Foundation
The composition and variation of the diet of urban Kestrels in Warsaw (Central Poland) were studied during non-breeding periods (October-March) between 1995 and 2003. A total of 1 651 pellets were collected (at 15 sites), in which 2 390 vertebrate prey items were found. The most common prey were small rodents (80% of items, 78% of biomass), predominantly Common Voles. Birds were markedly less common (7% of items, 11% of biomass). The dietary composition was variable during the cold season. Mean ambient temperature and the consecutive day of the cold season did influence the diet composition but snow depth did not. The main prey category in the Kestrels' diet — Microtidae — remained stable and independent of weather conditions. The percentages of mice and birds were negatively affected by mean ambient temperature, and consumption of birds was higher at the beginning (October) than at the end of the winter (March). Prey number and biomass of prey per pellet decreased during the cold season but were not influenced by temperature. The index of food niche breadth was inversely proportional to temperature.
oai:rcin.org.pl:55639 ; 10.3161/068.042.0105
MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; click here to follow the link
Copyright-protected material. May be used within the limits of statutory user freedoms
Museum and Institute of Zoology of the Polish Academy of Sciences
Library of the Museum and Institute of Zoology of the Polish Academy of Sciences
Oct 2, 2020
Jul 29, 2015
64
https://rcin.org.pl./publication/75719
Riegert, Jan Fainová, Drahomíra Mikeš, Václav Fuchs, Roman
Rejt, Łukasz Turlejski, Krzysztof Bronche, Krzysztof Topczewski, Andrzej M.
Salvati, Luca Manganaro, Alberto Fattorini, Simone Piattella, Emanuele
Padilla, David P Nogales, Manuel Marrero, Patricia
Rejt, Łukasz
Żmihorski, Michał (1981– )