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First report of hepatic cysticercosis in a Rook (Corvus frugilegus) (Passeriformes, Corvidae)

100%

Nourani H., Dehkordi H. A., Soltani S., Khosravi M.

Annals of Parasitology

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2014

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tom 60

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nr 4

Cysticercosis is an infection with the larval (cysticercus) stage of Taenia spp. that it is seen as cysts in various human and animal tissues. In this study, pathologic findings of hepatic cysticercosis in a rook (Corvus frugilegus) is described. To our knowledge, there is no report on hepatic cysticercosis in rook and this study shows that rooks may play a role as intermediate hosts in the transmission of parasitic infections.

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The wintering strategy of rooks Corvus frugilegus Linnaeus, 1758, in Poznan, west Poland

100%

Winiecki A.

Acta Zoologica Cracoviensia

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2000

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tom 43

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nr 1-2

3

Habitat preferences of foraging Rooks Corvus frugilegus during the breeding period in the agricultural landscape of Eastern Poland

100%

Kasprzykowski Z.

Acta Ornithologica

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2003

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tom 38

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nr 1

4

Gastropods in the Rook's (Corvus frugilegus) food

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Bural D., Maciorowski G., Urbanska M., Gierszal H.

Folia Malacologica

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2012

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tom 20

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nr 1

5

Different extinction risks of the breeding colonies of Rooks Corvus frugilegus in rural and urban areas of SW Poland

80%

Orlowski G., Czapulak A.

Acta Ornithologica

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2007

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tom 42

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nr 2

145-155

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Feeding strategy of wintering rooks Corvus frugilegus L. in urban habitats

80%

Jadczyk P., Drzeniecka-Osiadacz A.

Polish Journal of Ecology

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2013

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tom 61

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nr 3

Rooks show a growing tendency to winter in cities. The aim of this study was to determine the influence of meteorological factors on the selection of feeding habitats and to discuss the diversity of feeding strategies in urban environments of different sizes and housing densities. The study was carried out in two cities in south-western Poland, Wrocław and Brzeg (populations of 636,000 and 39,000, respectively), in the years 2004–2008. Nineteen research areas differing in housing density were controlled once a week. In multiple regression, the number of rooks feeding in urban environments showed a correlation with air temperature and the thickness of snow cover. The densities of feeding rooks were higher in urban environments than in agrocenoses. They were also higher in Wrocław than in Brzeg, and in built-up areas than in undeveloped ones. Feeding groups were smaller in Brzeg than in Wrocław. They were also smaller in built-up areas in Brzeg than in undeveloped ones. More rooks fed individually in Brzeg than in Wrocław. The diversity in the frequency of individually feeding rooks in built-up and undeveloped environments was specific to each city. Rooks feeding in Brzeg were more active in searching for food than those in Wrocław, and birds feeding on optimum, undeveloped feeding grounds were more active than those in built-up areas . In both cities, rooks were fed by humans, mainly in built-up areas.

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Seed dispersal by the Rook Corvus frugilegus L. in agricultural landscape - mechanisms and ecological importance

80%

Czarnecka J., Kitowski I.

Polish Journal of Ecology

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2010

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tom 58

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nr 3

The study aimed to evaluate the role of the Rook Corvus frugilegus in the long-distance seed dispersal in agricultural landscape. According to the literature, Rooks feed in the distance 0.3–1 km from the breeding colonies and 10–40 km from winter communal roosts, and these can be also the potential seed dispersal distances. We concentrated on the dispersal of diaspores of ornitochorous species and weeds (called non-ornitochorous) taken probably incidentally during foraging for other edible plant material. The contents of 528 pellets was analysed, 304 were collected at six sites of breeding colonies located in five rural parks and in one park on the city outskirts, and 224 under three winter roosts in the cities. Seeds representing 45 taxa were found, the most important groups among them are: ornitochorous species (10 taxa), non-ornitochorous (27 taxa, mainly weeds and ruderal species) and cereals (4 species). The mean number of seeds varied between 221 and 442 seeds per 100 pellets in the case of breeding colonies, and between 102 and 347 for wintering roosts. Fruits of ornitochorous species are an important element of the diet of the Rook: Cerasus avium and Fragaria sp. during breeding season and Vitis sp., Sorbus aucuparia and Sambucus nigra during winter. Nonornitochorous species are present in pellets in lower numbers and frequencies than ornitochorous ones and they can be divided into two groups: those transported during breeding season (mainly Stellaria media) and those during winter (Setaria sp. and Echinochloa crus-galli). We estimated that the number of non-ornitochorous seeds transported by birds from the biggest observed winter roosts can exceed 400 thousands seeds per month. The value is much lower in the case of the biggest breeding colony: approximately 16 thousands of propagules. We also checked if species found in pellets can germinate in natural conditions under the studied colonies. Viable individuals of 15 nonornitochorous and of one ornitochorous species were found there, and it was observed that disturbances of soil surface promote germination of some analysed species.

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Long-term population trends of corvids wintering in urban parks in Central Poland

71%

Mazgajski T. D., Zmihorski M., Halba R., Wozniak A.

Polish Journal of Ecology

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2008

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tom 56

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nr 3

521-526

Changes in the numbers of corvids wintering in Warsaw (Central Poland), in the last sixteen years were analyzed. Four species were studied: Rook Corvus frugilegus L., Jackdaw C. monedula L., Hooded Crow C. corone cornix L. and Magpie Pica pica (L.) The results were based on density data for birds foraging in three urban parks. The bird counts were conducted in November and December 1988–2003. It was found that the number of wintering Rooks decreased significantly (0.5 fold), populations of Jackdaws and Hooded Crows – increased (4.25 and 3.95 fold, respectively), and no apparent trends were observed for Magpies during this period. Observed trends for Rooks as well as comparisons of limited data gathered earlier in other areas may confirm suggestions about the changing of migration routes of this species.

Ograniczanie wyników

First report of hepatic cysticercosis in a Rook (Corvus frugilegus) (Passeriformes, Corvidae)

The wintering strategy of rooks Corvus frugilegus Linnaeus, 1758, in Poznan, west Poland

Habitat preferences of foraging Rooks Corvus frugilegus during the breeding period in the agricultural landscape of Eastern Poland

Gastropods in the Rook's (Corvus frugilegus) food

Different extinction risks of the breeding colonies of Rooks Corvus frugilegus in rural and urban areas of SW Poland

Feeding strategy of wintering rooks Corvus frugilegus L. in urban habitats

Seed dispersal by the Rook Corvus frugilegus L. in agricultural landscape - mechanisms and ecological importance

Long-term population trends of corvids wintering in urban parks in Central Poland