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Documents disponibles écrits par cet auteur (20)
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Article
Michał Polakowski, Auteur ; Monika Broniszewska, Auteur ; Łukasz Jankowiak, Auteur ; Zbigniew Kasprzykowski, AuteurVigilance, a crucial factor affecting the behaviour of birds, is key to the safety of migratory animal flocks against predators and other threats. We examined the vigilance of White-fronted Geese in the Biebrza Basin (NE Poland), one of their ma[...]
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Artur Golawski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Cezary Mitrus, Auteur ; Mirosław Rzępała, Auteur ; Piotr Szczypiński, Auteur ; Henryk Kot, AuteurIn large parts of Europe biodiversity in agricultural landscapes has experienced strong declines over the past decades because of land-use change and intensification of cultivation methods, but more recently also due to modernization of villages[...]
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Urszula Zaremba, Auteur ; Artur Golawski, Auteur ; Zbigniew Kasprzykowski, AuteurPost-natal growth has long-term consequences for survival and fitness in birds and is subject to strong directional selection. Highly variable patterns of nestling development are influenced by an array of extrinsic and intrinsic factors. This s[...]
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Michal Polakowski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Artur Golawski, AuteurMany birds are advancing their mitatory phenology and arriving earlier at their spring staging areas in response to climate warming. The duration of the spring migration of geese depends on the interaction between feeding conditions and dates. W[...]
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Artur Goławski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Mateusz Ledwon, Auteur ; Emilia Mróz, Auteur ; Federico Morelli, AuteurCapsule Evidence from two tern species does not support the theory that species in expansion should bias their brood sex ratios towards the more dispersing sex.Aims Sex ratio theory predicts that when a species is in expansion, the sex ratio sho[...]
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Artur Goławski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Emilia Mróz, Auteur ; Mirosław Rzępała, Auteur ; Sławomir Chmielewski, AuteurABSTRACT In the last 20 years, a westward expansion of the White-winged Tern (Chlidonias leucopterus) has been reported in Europe. Even though this species has become a regular breeder in some places, we lack basic information on the choice of b[...]
Article
Artur Go\lawski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Emilia Mróz, Auteur ; Miros\law Rzępa\la, Auteur ; S\lawomir Chmielewski, Auteur
Article
Zbigniew Kasprzykowski, Auteur ; Artur Golawski, AuteurCapsule Fallow land, manure heaps and stubble were the most important habitats for birds wintering in low-intensity farmland in eastern Poland. Aims To describe habitat types and to determine the preferences of granivorous passerines in open far[...]
Article
Zbigniew Kasprzykowski, Auteur ; Artur Golawski, AuteurCapsule Fallow land, manure heaps and stubble were the most important habitats for birds wintering in low-intensity farmland in eastern Poland. Aims To describe habitat types and to determine the preferences of granivorous passerines in open far[...]
Article
Grzegorz Orlowski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Zbigniew Zawada, Auteur ; Grzegorz Kopij, AuteurStomach content was examined in 53 out of 56 dead Rook Corvus frugilegus nestlings found in several breeding colonies in Poland. The stomachs contained 29 different types of items, 46.5% of which were animal, 12.2% plant and 41.2% mineral (small[...]
Article
Zbigniew Kasprzykowski, AuteurCapsule The position of a nest in the tree influences some parameters of reproduction. Aim To determine breeding parameters in relation to the spatial distribution of nests in trees. Methods In 2000-02 a total of 177 Rook nests were studied in s[...]
Article
Michal Polakowski, Auteur ; Lukasz Jankowiak, Auteur ; Zbigniew Kasprzykowski, Auteur ; Gerard Bela, Auteur ; Andrzej Kosmicki, Auteur ; Adam Janczyszyn, Auteur ; Artur Niemczyk, Auteur ; Dawid Kilon, AuteurSome of the known major bottlenecks on European flyways are yet insufficiently explored and require more intensive study. On the basis of raptor counts on the Vistula Spit (southern Baltic coast, Poland), from 15th August to 15th November 2008-2[...]
Article
Artur Golawski, Auteur ; Emilia Mróz, Auteur ; Zbigniew Kasprzykowski, AuteurPeripheral populations that are expanding their distribution often colonise habitats that are different from the centre of their distribution range. These less optimal areas could have an adverse effect on their breeding success. Consequently, t[...]
Article
Zbigniew Kasprzykowski, AuteurThe study was conducted in the Mazovian and South-Podlasian Lowlands, east-central Poland, covering ca. 13% of the area of Poland. The data for 1975-2000 are based on the author's own observations and material gathered by the regional card-index[...]
Article
Zbigniew Kasprzykowski, AuteurThe study was conducted in the Mazovian and South-Podlasian Lowlands, east-central Poland, covering ca. 13% of the area of Poland. The data for 1975-2000 are based on the author\'s own observations and material gathered by the regional card-inde[...]
Article
Grzegorz Orlowski, Auteur ; Zbigniew Kasprzykowski, Auteur ; Wojciech Dobicki, Auteur ; Przemyslaw Pokorny, Auteur ; Ryszard Polechonski, AuteurLevels of copper, zinc, and arsenic were analyzed in the Rook Corvus frugilegus eggshells from 43 breeding colonies located in different parts of Poland. The average [95% confidence interval (CI)] level of copper was found to be 8.13 (0.64-15.62[...]
Article
Zbigniew Kasprzykowski, Auteur ; Marcin Polak, AuteurThe Eurasian Bittern Botaurus stellaris has a polygynous mating system where the nests of solitary and clumped females are located within a male territory. However, the factors that may favour the formation of nest clusters remain unknown. The f[...]
Article
Artur Golawski, Auteur ; Zbigniew Kasprzykowski, AuteurCounts of wintering birds were conducted in the extensively cultivated farmland of eastern Poland during three seasons. The number of wintering species of birds was negatively correlated with the depth of snow and positively related to the numbe[...]
Article
Przemysław Obłoza, Auteur ; Dominik Krupiński, Auteur ; Zbigniew Kasprzykowski, AuteurThe most important cause of the declining numbers of wading birds is a combination of habitat loss and degradation, as well as low productivity due to predation. Knowledge of the habitat requirements of this endangered group of species is critic[...]
Article
Zbigniew Kasprzykowski, Auteur ; Pawel Ciesluk, AuteurConditions at wintering grounds affect the numbers of birds of prey to various extents. Weather may influence the latitudinal winter distribution of short-distance migrants, such as the Rough-legged Buzzard, with respect to age and sex. Inventor[...]
