Wyniki wyszukiwania

1

Starina water dam - a new resting site for migrating birds in Eastern Slovakia

100%

Pcola S.

Roczniki Bieszczadzkie

|

2003

|

tom 11

2

Notes on calls of the Yellow-breasted Boubou [Laniarius atroflavus] during the breeding season in NW Cameroon

86%

Riegert J., Pribylova A., Sedlacek O.

Biological Letters

|

2004

|

tom 41

|

nr 2

181-184

3

Conspicuousness of a flush-pursue predator, the painted redstart [Myioborus pictus L.]: an experiment using bird models in a breeding habitat

86%

Jablonski P. G.

Polish Journal of Ecology

|

2004

|

tom 52

|

nr 1

White patches in the Painted Redstart (Myioborus pictus) are adaptations to flush prey during flush-pursue foraging which is characteristic for this species. Conspicuousness of white wing patches was measured in terms if time needed for a human observer to find a taxidermic model in a natural habitat. The time to find a model without patches did not differ from the time to find a model with white patches, indicating that white patches do not confer higher conspicuousness to non-moving redstarts. The results are discussed in terms of predation risk from such visually orienting predators as hawks or pygmy owls, and in comparison to other Myioborus species, all which do not posses the white wing patches.

4

Song structure and variation in yellowhammers Emberiza citrinella from Western Poland

86%

Rutkowska-Guz J. M., Osiejuk T. S.

Polish Journal of Ecology

|

2004

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tom 52

|

nr 3

Bird species are characterised by amazing diversity of acoustic communication systems. Their properties are shaped by several ecological factors, which still are weakly known. This paper describes song structure, song types and within-song-type repertoire variation in yellowhammers Emberiza citrinella from a stable Polish population, analysed by using the minimal unit of production approach. We also present data on temporal organisation of song output in two singing contexts (solo vs. counter-singing). Males from the studied population sang strophes from only one dialect, characterised by specific composition of terminal whistles. The dialect from the study area seems to be identical to dialects described in geographically distant populations from eastern Germany, Hungary and Greece. Song type repertoire varied between 1 and 5 (exceptionally 8), but over 75% of extensively recorded males had only 2 or 3 song types in their repertoires, which is typical for the species. Within-song-type variation was analysed on two levels: (1) version level, describing the number of terminal whistles; and (2) variant level, describing any minor variation in syllable presentation. The pattern of song version usage was inconsistent. It could be connected both with singing context or song type characteristics and surely requires detailed research. Song variants were used by birds in a way suggesting that they represent a song production error. We found that males switched between different song types significantly faster when counter-singing, in comparison to solo singing, which could be related to elevated aggressive motivation or to some coordination of counter-singers’ output.

5

Cluster-based approach for identifying avian life-history groups for use in ecological monitoring

86%

Tworek S.

Polish Journal of Ecology

|

2007

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tom 55

|

nr 1

Almost ‘since ever’ ecologists have made attempts at the generalization of various site-specific, species-specific and timespecific situations, including different classifications of species, based on different principles and prepared for different purposes. This paper, presenting a conceptual model for selecting species of similar life-history pattern to other species and providing an example using birds as a model system, represents that current in the ecology. All bird species regarded as nesting in a given area of the mosaic landscape in southern Poland were described with respect to nine variables (nest type, nest location, food habits, place and way of foraging, migration status, number of broods, clutch size, incubation and fledging periods), grouped into 43 categories. Cluster analysis was then used to distinguish objectively species displaying similar life history traits and environmental adaptations into unique life-history ‘strategies’. The results of an exemplary analysis of variability in the density, domination, number of species and turnover rate in particular strategies, depending on the size of study plots, their structure, degree of isolation and the characteristic features of their surroundings, using regression and canonical correlation techniques, indicate the suitability of this approach to testing detailed hypotheses connected e.g. with studies on the response of species to different habitat conditions. The methods applied allow one to distinguish, in an objective way, the groups of species displaying similarities with respect to life history traits and environmental adaptations, in spite of the fact that the method of describing variables in cluster analysis may determine a different allocation of species to groups. A model, as described, could allow conservation principles to be developed for species of similar distribution, ecological feature or life history; especially for those species which face with population declines and for which no previous patterns have been established.

6

The finnish Lesser White-fronted Goose [Anser eryhtropus] project

86%

Markkola J., Tynjala M.

The Ring

|

1993

|

tom 15

|

nr 1-2

7

Modelling of the seasonal dynamics of bird migration

86%

Busse P.

The Ring

|

1996

|

tom 18

|

nr 1-2

8

Evaluation of the applicability of polymerase chain reaction [PCR] to sex identification in Eurasian blackbirds [Turdus merula]

72%

Dybus A., Siemierz A., Wysocki D., Szatkowska I., Muszynska M., Guenzel S.

Biological Letters

|

2009

|

tom 46

|

nr 1

17-22

9

Survival chances of ground nests in a meadow habitat: a case study in Vrana Lake Nature Park (Mediterranean region, Croatia)

72%

Purger J. J., Muzinic J., Purger D.

Polish Journal of Ecology

|

2012

|

tom 60

|

nr 1

The number of ground-nesting bird species in meadows, one of the most vulnerable habitats in the ornithological reserve of Vrana Lake Nature Park has decreased in recent decades. Nest survival rates were investigated in meadows and reed beds using nest predation experiments in late March and in May 2005. Predators damaged 18% of the 50 artificial nests placed in the pasture meadow habitat in March and 22% in May. Daily survival rate of nests were found to be similar in March (97%) and May (96%). In May, 64% of 25 nests located in the reed bed were discovered by the predators, with the daily survival rate of nests (90%) being significantly lower than that of nests in the nearby meadow. The results suggest that the reasons for the decreasing number of nesting bird species may be – instead of the pronounced presence and activity of predators in the area – the shrinkage of meadow area, the lack of buffer zone, the proximity of agricultural lands, and disturbance caused by intensive grazing.

10

Occurrence of Cryptosporidium hominis in pigeons [Columbia livia]

72%

Abreu-Acosta N., Foronda-Rodriguez P., Lopez M., Valladares B.

Acta Parasitologica

|

2009

|

tom 54

|

nr 1

1-5

This study demonstrated the presence of Cryptosporidium hominis in pigeons for the first time. Previously, C. hominis had been cited only in another bird species, Branta canadiensis. The present findings suggest that pigeons may act as mechanical vectors for this protozoan.

11

Bird migration study - site Siemianowka [E Poland] in 2002-2003

72%

Polakowski M., Broniszewska M., Krasnodebska A., Tumiel T., Wnorowska A.

The Ring

|

2004

|

tom 26

|

nr 2

12

Bird migration in the spring at Strophades Islands [Ionian Sea, Greece]

72%

Schogolev I., Dimaki M.

The Ring

|

1996

|

tom 18

|

nr 1-2

13

Characterization of Brachyspira sp. strains isolated from flock of hens with diarrhoea

72%

Kizerwetter-Swida M., Rzewuska M., Binek M.

Bulletin of the Veterinary Institute in Puławy

|

2005

|

tom 49

|

nr 2

14

Nest losses of cavity nesting birds caused by dormice [Gliridae, Rodentia]

72%

Adamik P., Kral M.

Acta Theriologica

|

2008

|

tom 53

|

nr 2

Mammals are common predators on bird nests. However, their species identity frequently remains unknown. Here we present long-term data (1975–2005) from a central European woodland on the predatory effect of three dormice species (Rodentia, Gliridae) on cavity-nesting birds. Dormice are mostly frugivorous during the active late-summer season, but shortly after they terminate hibernation, they frequently depredate cavity-nesting-bird nests. The seven bird species studied, lost on average between 2.9 to 18.4% of their broods. MigratoryFicedula flycatchers suffered the highest brood losses, while the residentParus titmice and the nuthatchSitta europaea had much lower brood losses. The three dormice species differed significantly in their predatory effect during different avian breeding stages. The edible dormouseGlis glis (Linnaeus, 1766) depredated both eggs and nestlings equally, while the common dormouseMuscardinus avellanarius (Linnaeus, 1758) and the forest dormouseDryomys nitedula (Pallas, 1778) destroyed more nests during egg laying and the incubation period. Among adult birds, females were taken more frequently by dormice than males. Among avian species, adultFicedula flycatchers were more often depredated than the titmice and nuthatch. Our study provided further evidence, that among the traditional studies on the costs of reproduction, parental mortality at the nests needs to be considered and that incubating or brooding females might be under higher predation risk than the males.

15

Results and interpretation of a 43 year study [1954-1996] of counting bird migration in the Wetland Reserve Wendesser Moor, Peine, Eastern Lower Saxony, Germany

72%

Oelke H., Schweitzer L.

The Ring

|

1996

|

tom 18

|

nr 1-2

16

The prey of Hooded Crow [Corvus cornix L.] in wetland: study of damaged egg shells of birds

72%

Zduniak P.

Polish Journal of Ecology

|

2006

|

tom 54

|

nr 3

The species composition of the Hooded Crow (Corvus cornix) prey and its preferences for selected bird species are described on the basis of the egg shells found in the flooded area in the National Park “Ujście Warty” in Western Poland. In the years 2000–2003, during breeding seasons, 1104 shells of 16 bird species were found. The most common species was the Coot Fulica atra (69% of all the shells). The remaining species mainly were: the Mallard Anas platyrhynchos (13%), the Black-headed Gull Larus ridibundus (7%), the Black-necked Grebe Podiceps nigricollis (4%) and the Garganey Anas querquedula (4%). The number of shells found and the median date when shells were found differed between the years of study. The differences are probably related to the effect of variation in the number and differences in breeding phenology of potential crow’s prey between seasons, which are connected with water conditions occurring in the study area.

17

Influence of agricultural landscape structure on breeding bird densities in lowland Polish farmland

58%

Przybycin P.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

|

2010

|

tom 53A

|

nr 1-2

18

Accuracy and resolution capacity of MRL-5(Is) radar ornithological station and its potential development

58%

Dinevich L., Leshem Y.

The Ring

|

2012

|

tom 34

19

Polyterritoriality and the first record of polygyny in the Red-breasted Flycatcher Ficedula parva in primeval forest

58%

Mitrus C., Socko B.

Acta Ornithologica

|

2005

|

tom 40

|

nr 2

170-172

Territoriality in Red-breasted Flycatchers was studied in the Białowieża Forest of Eastern Poland during five consecutive breeding seasons (2000-2004). In total 99 males were individually marked, and evidence of polyterritoriality was found in 10% of them. The proportion of polyterritorial males varied from 0% (in 2003) to 13.6% (in 2001). The mean distance between the first and second territories was 278 m (± 179.37, n = 10). The rate of polyterritoriality was not related to age class, as older males defended dual territories that were, on average, not more distantly separated than those of younger males. One case of polygyny was recorded. To our knowledge, this is the first evidence for polyteritoriality and polygyny in male Red-breasted Flycatchers.

20

Variation in bird diversity in relation to habitat size in the urban landscape of Seoul, South Korea

58%

Kim J., Chae J., Koo T.-H.

Acta Ornithologica

|

2007

|

tom 42

|

nr 1

39-44

Ograniczanie wyników

Starina water dam - a new resting site for migrating birds in Eastern Slovakia

Notes on calls of the Yellow-breasted Boubou [Laniarius atroflavus] during the breeding season in NW Cameroon

Conspicuousness of a flush-pursue predator, the painted redstart [Myioborus pictus L.]: an experiment using bird models in a breeding habitat

Song structure and variation in yellowhammers Emberiza citrinella from Western Poland

Cluster-based approach for identifying avian life-history groups for use in ecological monitoring

The finnish Lesser White-fronted Goose [Anser eryhtropus] project

Modelling of the seasonal dynamics of bird migration

Evaluation of the applicability of polymerase chain reaction [PCR] to sex identification in Eurasian blackbirds [Turdus merula]

Survival chances of ground nests in a meadow habitat: a case study in Vrana Lake Nature Park (Mediterranean region, Croatia)

Occurrence of Cryptosporidium hominis in pigeons [Columbia livia]

Bird migration study - site Siemianowka [E Poland] in 2002-2003

Bird migration in the spring at Strophades Islands [Ionian Sea, Greece]

Characterization of Brachyspira sp. strains isolated from flock of hens with diarrhoea

Nest losses of cavity nesting birds caused by dormice [Gliridae, Rodentia]

Results and interpretation of a 43 year study [1954-1996] of counting bird migration in the Wetland Reserve Wendesser Moor, Peine, Eastern Lower Saxony, Germany

The prey of Hooded Crow [Corvus cornix L.] in wetland: study of damaged egg shells of birds

Influence of agricultural landscape structure on breeding bird densities in lowland Polish farmland

Accuracy and resolution capacity of MRL-5(Is) radar ornithological station and its potential development

Polyterritoriality and the first record of polygyny in the Red-breasted Flycatcher Ficedula parva in primeval forest

Variation in bird diversity in relation to habitat size in the urban landscape of Seoul, South Korea