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Avifaunal diversity in two residential localities of Kolkata, India

100%

Chattopadhyay R., Ghoshal S.

International Letters of Natural Sciences

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2015

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tom 48

Avifauna in two different residential localities of Kolkata viz. Cossipore of North Kolkata and Dhakuria of South Kolkata was done in twelve months period from December, 2013 – November, 2014 to get some idea about the present avian diversity of the city. Total forty eight species of birds belonging to twenty five families were identified from the two sites and recorded along with their abundance in this study. Fluctuations in abundance of bird fauna between the study areas were also recorded which may be attributed to the loss of proper habitat for foraging and nesting due to continuous urbanization and increased pollution rates.

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Are winter species composition and abundance censuses of birds in small urban green areas comparable?

84%

Brauze T., Zielinski J.

Acta Ornithologica

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2006

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tom 41

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nr 2

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How urban Kestrels Falco tinnunculus divide their hunting grounds: partitioning or cohabitation?

84%

Riegert J., Fainova D., Mikes V., Fuchs R.

Acta Ornithologica

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2007

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tom 42

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nr 1

69-76

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The influence of weather factors on the daily activity of urban populations of birds at their common roosts in Slupsk

84%

Gorska E.

Acta Zoologica Cracoviensia

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1998

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tom 41

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nr 1

5

Survival and site fidelity of urban Blackbirds Turdus merula - comparison of Cormack-Jolly-Seber and Barker models

67%

Jankowiak L., Wysocki D., Greno J.

Acta Ornithologica

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2016

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tom 51

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nr 2

Studies dealing with the individual survival of birds in open populations usually estimate survival according to capture-recapture models like the Cormack-Jolly-Seber (CJS). In fact, these models estimate local apparent survival (φ), which is a combination of the probabilities of true survival (S) and site-fidelity (F), i.e. death and emigration are confounded. These S and F parameters can be estimated by using 'robust' models (e.g. Barker's model), which use additional resighting and dead reports data. We aim to compare the results (and associated biological implications) obtained by analysing juvenile and adult survival in a Polish urban population of Blackbirds Turdus merula using both the CJS and Barker models. Our CJS models estimated high φ values for both juvenile and adult birds (0.48 and 0.62, respectively). The lower scores for juveniles could be interpreted as low juvenile overwintering survival. By fitting Barker models to the same dataset we determined that juvenile site fidelity was lower than that of adults (0.91 and 0.93, respectively), so natal dispersal was slightly greater than breeding dispersal. The high fidelity causes similarity between apparent survival and true survival parameters (S: 0.51 for juveniles, 0.64 for adults). The results are comparable with data from other urban populations. Thus, using robust models certainly allows one to reduce the noise of movements confounding and/or masking survival probabilities, but one can also determine the individual or environmental variables affecting any of them separately.

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Weather-dependent variation in the cold-season diet of urban Kestrels Falco tinnunculus

67%

Zmihorski M., Rejt L.

Acta Ornithologica

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2007

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tom 42

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nr 1

107-113

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Analysis of microsatellite polymorphism and genetic differentiation in urban and rural Kestrels Falco tinnunculus [L.]

67%

Rutkowski R., Rejt L., Szczuka A.

Polish Journal of Ecology

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2006

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tom 54

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nr 3

The European Kestrel Falco tinnunculus (L.) is commonly observed in urban-industrial environment. Colonization of cites by the species was shown to be interlinked with changes in its ecology and breeding biology. Such adaptations can lead to isolation of urban populations from rural birds. In this paper we investigated genetic differentiation between birds from centre of Warsaw (Centre Group), suburban area of the city (Suburban Group) and one rural area (Rural Group). We analyse polymorphism of six microsatellite loci in 56 kestrels. The results shown moderate and significant differentiation between Centre and Rural groups and intermediate differentiation among Suburban and two other groups. Although our study is based on small number of individuals and only one rural sampling site, it suggested some level of isolation between city and rural environment. We assumed that observed differentiation might be the result of Urban Island system of appearance and maintenance of kestrel population in Warsaw. We also suspect that suburban areas of the city form a ‘zone of admixture’, where genes from the city and non-urban populations are ‘meeting’.

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Wing to tail length ratio in European Blackbirds [Turdus merula L.] of different age

67%

Wysocki D., Kiriaka B.

Polish Journal of Ecology

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2007

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tom 55

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nr 1

Urban European Blackbird (Turdus merula L.) population was studied in 1997–2004 in two city parks of Szczecin (NW Poland), based on observations of colour-ringed birds. Biometric studies involving numerous bird species showed that the wings of individuals in their second year of life are shorter than those of birds older than two years; the causes of the differences are, however, unclear. The wing length of the individuals observed the year following the ringing was similar to that of the individuals that were not observed that year (probably non-survivors) –127.2 vs. 127.5 mm for young birds, 129.9 vs. 128.3 mm for old birds, respectively. Therefore, the hypothesis assuming increased mortality of shorter-winged individuals has to be rejected. In opposition to the expected differences between the wing to tail length ratios in the young and older birds (1st year – 1.43, 2nd year – 1.40, older – 1.39) one has to reject the hypothesis that the young individuals benefit from higher maneuverability of shorter wings. On the other hand, the greater wing length of those individuals captured in their second year of life and recaptured one year later (127.2 vs. 129.7 mm respectively) allows to accept the hypothesis of better nutrition as the cause of longer wings in the older blackbirds.

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Birds and bats using buildings as a place of breeding or shelter

43%

Janus K., Lesinski G.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

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2018

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tom 57[1]

Birds and bats using buildings as a place of breeding or shelter.The presence of birds and bats was analysed in buildings intended for thermal refurbishment. Study material was collected in the years 2012-2016 in 336 buildings from 11 voivodships. For detailed analyses concerning birds, data from three voivodships were selected: kujawsko-pomorskie, łódzkie and mazowieckie. To determine differences in the location of bat roosts, buildings from all voivodships were compared. Bird nesting places and daytime bat roosts were divided into 22 locations. Regional differences in the occupation of buildings were analysed. For comparison, the analysed buildings were divided into churches, tenements, public buildings, and residential blocks. Buildings used by birds were also compared with respect to the degree of urbanization of their surroundings. Species-specific differences in their preference for occupying buildings of different types were analysed in birds. Birds were found in 78.9% of buildings and bats – in 8.9% of buildings. 2,250 bird nests in 265 buildings and over 1,000 bats in 30 buildings were inventoried. The bird species most often found in buildings were: the swift Apus apus (40.5%), house sparrow Passer domesticus (31.7%) and jackdaw Corvus monedula (9.9%). Bat species found in buildings included: the common noctule Nyctalus noctula, serotine bat Eptesicus serotinus, lesser horseshoe bat Rhinolophus hipposideros, pipistrelles Pipistrellus and long-eared bats Plecotus. The house sparrow most often inhabited buildings in kujawsko-pomorskie voivodship and the swift most often inhabited buildings in mazowieckie and łódzkie voivodships. Birds in kujawsko-pomorskie voivodship most often built their nests under roofs and birds from mazowieckie and łódzkie voivodships in flat roof spaces. A total of 31 bat roosts were located in 30 buildings in five different locations. Bats most often occupied flat roof spaces and attics and least often occupied crevices behind the gutter.

Ograniczanie wyników

Avifaunal diversity in two residential localities of Kolkata, India

Are winter species composition and abundance censuses of birds in small urban green areas comparable?

How urban Kestrels Falco tinnunculus divide their hunting grounds: partitioning or cohabitation?

The influence of weather factors on the daily activity of urban populations of birds at their common roosts in Slupsk

Survival and site fidelity of urban Blackbirds Turdus merula - comparison of Cormack-Jolly-Seber and Barker models

Weather-dependent variation in the cold-season diet of urban Kestrels Falco tinnunculus

Analysis of microsatellite polymorphism and genetic differentiation in urban and rural Kestrels Falco tinnunculus [L.]

Wing to tail length ratio in European Blackbirds [Turdus merula L.] of different age

Birds and bats using buildings as a place of breeding or shelter