Wyniki wyszukiwania

1

Selected aspects of breeding biology in the Tree Sparrow Passer montanus saturatus [Stejneger, 1886] in South Korea

100%

Pinowska B., Pinowski J., Hahm K. H.

Acta Zoologica Cracoviensia

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1999

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tom 42

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nr 3

2

Population density and breeding ecology of the House Martin Delichon urbica in Pomerania [NW Poland]

100%

Gorska E.

Acta Ornithologica

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2001

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tom 36

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nr 1

Studies were carried out in 23 rural-sample plots in NW Poland in 1985-1995 (total study area — 5 117 km2, including 635 villages and other settlements). The density of the breeding population in the overall landscape varied between 2.2 and 16.2 nests/km2, and in built-up areas from 207 to 1303 nests/km2. In the first brood, begun in mid-May, the average clutch was 3.99 eggs; 47% of clutches contained 4 eggs, 23% — 3 eggs and 21% — 5 eggs. In the second brood the average clutch was 3.61 eggs. Clutches of 4 and 3 eggs accounted for 49% and 26% respectively of the total number of clutches. 49% of pairs from the first broods were also involved in second ones. Hatching success (number of young hatched compared with the number of eggs laid) was 94.3% in the first brood and 95.8% in the second. Fledging success (number of young fledged compared to the number hatched) was 97.5% and 95.1% respectively and final breeding success (number of fledglings compared to the number of eggs laid) was 91.9% and 91.2%. A statistical pair produced 5.3 young per breeding season.

3

Nesting ecology of the Spotted Munia Lonchura punctulata in Mudumalai Wildlife Sanctuary [Southern India]

100%

Gokula V.

Acta Ornithologica

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2001

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tom 36

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nr 1

The nesting period of the Spotted Munia is from July to November, a period with frequent rains. Built of grass, nests (n = 60) were spherical or dome-shaped, with a lateral entrance-hole oriented mainly along the most frequent wind direction. They were mostly built on twigs within the tree canopy, the majority of them on thorny plant species. The mean depth and diameter of the nests were 12.32 cm and 4.18 cm respectively. Nesting activities were shared by both sexes. Four to six eggs were laid. The incubation period in 17 pairs varied from 10 to 15 days. All the nests (n = 60) were situated on four plant species only, the greatest preference being for Toddalia asiatica (50%), followed by Gymnosporia montana (25%) and Acacia chundra (20%). Although 50% of the nests were found on T. asiatica, this plant is a straggler and no nest was built on it if it was not present in association with G. montana. For constructing nests the Spotted Munia selected short and small trees in a microhabitat with low canopy cover.

4

Intrapopulation variation of egg size in the White Stork [Ciconia ciconia] in Southern Poland

100%

Profus P., Tryjanowski P., Tworek S., Zduniak P.

Polish Journal of Ecology

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2004

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tom 52

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nr 1

White Stork (Ciconia ciconia) eggs were studied in Upper Silesia, Southern Poland. The measurements of eggs – their length, breadth, volume and elongation index were collected for 95 nests in years 1974–2002, and repeatability of these measurements was computed. Mean clutch size was 4.05 ± 0.82. Mean egg measurements were: 72.10 ± 2.18 mm, 52.19 ± 1.47 mm, 100.49 ± 6.92 cm³ and 1.38 ± 0.05, for length, breadth, volume and elongation index, respectively. Coefficients of variation for clutch means ranged from 1.68 (breadth) to 4.37 (volume). Mean repeatability estimates were 0.53, 0.68, 0.63, 0.58 for length, breadth, volume and elongation index, respectively. The results obtained suggest that one should expect relatively low or intermediate heritability of egg dimensions in population studied.

5

Intraspecific brood parasitism in Barn Swallows Hirundo rustica nesting in bunkers

84%

Czechowski P., Zduniak P.

Acta Ornithologica

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2005

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tom 40

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nr 2

163-164

During a four-year study of the breeding biology and ecology of an atypical population of Barn Swallows nesting in 13 abandoned post-war bomb shelters, the unexpected presence of foreign juveniles in active nests with nestlings was recorded on eight occasions. In five cases, single birds were noted, and in the other three, two foreign individuals were observed. The average age of the nestlings joined by foreign juveniles was 11.6 days (SE = 1.08, range 8-16), while the average age of the latter birds recorded with the nestlings was 23.2 ± 1.02 days (range 20-25). The mean distance between the hatching and parasitised nests was 0.9 ± 0.11 m (range 0.5-1.2). This unusual behaviour in swallows seems to be deliberate and is aimed at choosing a nest with nestlings in order to obtain extra food from experienced adult birds rather than an error caused by the darkness in the shelter.

6

Breeding habitat selection in the House Martin Delichon urbica in the city of Valencia [Spain]

84%

Murgui E.

Acta Ornithologica

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2002

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tom 37

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nr 2

7

Breeding ecology of the Black-crowned Night Heron in Korea

84%

Yu J. P., Hahm K. H.

Acta Zoologica Cracoviensia

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1997

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tom 40

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nr 2

8

Breeding biology and ecology of Whinchat Saxicola rubetra on abandoned farmland of Opole Province (SW Poland)

67%

Frankiewicz J.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2008

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tom 51A

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nr 1-2

9

Factors affecting occurrence of Red-backed Shrike (Lanius collurio) and Lesser Grey Shrike (Lanius minor) in low-intensify agriculture areas from Estern Europe

67%

Ajder V., Baltag S.

Polish Journal of Ecology

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2017

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tom 65

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nr 2

Shrikes represent an important group of farmland bird species which inhabit open habitats where they prey on invertebrates and small vertebrates. Like the other farmland birds, shrikes are in the decline across their breeding range. During the 2014 breeding season, we conducted point observations in 470 locations in the Republic of Moldova, recording all the shrike individuals that were seen during 5 minutes. The highest density has been recorded for the red-backed shrike Lanius collurio, (0.489–0.652 breeding pairs ha-1) while for lesser grey shrike Lanius minor the density is ten times lower (0.042–0.076 breeding pairs ha-1). These two shrike species select pasture areas for breeding and avoid artificial surfaces, forests and wetlands. Regarding the geomorphological variables, red-backed shrikes and lesser grey shrikes prefer areas of a low, flat ground and aspects with low exposure to the sun radiation. According to the General Linear Model analyses, the red-backed shrike distribution is significantly influenced by percentage of arable land and orchards, while for lesser grey shrike we did not find any significant influence of environmental variables studied.

10

Densities and habitats of the Tawny Pipit Anthus campestris in the Wielkopolska region [W Poland]

67%

Grzybek J., Michalak I., Osiejuk T. S., Tryjanowski P.

Acta Ornithologica

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2008

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tom 43

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nr 2

221-225

The material was collected in a large plot (100 km2) in west-central Poland in 2004-2005. The average density was 85.5 breeding pairs/100 km2 and was similar during both years of the study. The vegetation structure (visibility of the territory surroundings, and height and density of the under-storey vegetation) was described for 82 pipit territories in 2004, and for 33 additional territories in 2005. The same information on habitat variables was collected in randomly selected localities. Tawny Pipits use nesting sites with very short vegetation and with a high number of areas free of vegetation or only covered with dry mosses. The available data on the Tawny Pipit's habitat in different European localities show that the species is able to occupy a much wider range of habitats. Destruction of habitats, for example, for the construction of a new motorway, influenced pipit numbers and distribution in the study area; even so, the studied population remains the densest and most stable in the geographical range of the species. Although the study area contains Tawny Pipits and other interesting species from a conservation point of view, protection of the land may be very difficult owing to changes in habitats that are being destroyed both by infrastructure investments, and also by the financial support farmers receive from the European Union, which allows them to cultivate more land and thus destroy bird habitats.

11

Abundance and breeding ecology of Brown Accentors Prunella fulvescens in Lhasa, Tibet

67%

Lu X.

Acta Ornithologica

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2006

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tom 41

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nr 2

12

Breeding ecology of Aquatic Warblers Acrocephalus paludicola in their key habitats in SW Belarus

67%

Vergeichik L., Kozulin A.

Acta Ornithologica

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2006

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tom 41

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nr 2

13

The breeding ecology of the Greenfinch Carduelis chloris in urban conditions [study in Krotoszyn, W Poland]

67%

Kosinski Z.

Acta Ornithologica

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2001

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tom 36

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nr 2

Data were collected in a medium-sized town. During five years 342 nests were found. The densities of breeding pairs varied over this period between 4.5 and 5.9 p/10 ha. The distribution of breeding pairs was uneven throughout the study area. The preferred nest sites were the roadside trees, where 88.9% of the nests were built. The mean onset of egg-laying was 22 April (range 19-26 April). There was a tendency to start breeding earlier in warmer springs. The mean clutch size was 5.07 ± 0.74. There was a positive correlation between clutch size and the date of egg-laying. These data suggest that there was a compromise between the tendency towards earlier breeding and clutch size. In the study area the Greenfinch is a double-brooded species. Unlike other studies it was noted that the average clutch size increased in the second half of the breeding season. The maximum clutch size coincides with the second or replacement clutches. Hatching, fledging and breeding success were lowest when clutch sizes were largest. The nesting success estimated with the Mayfield and the "traditional" method was approximately similar (0.40 and 0.44 respectively). Cats and mustelids were probably the cause of most breeding failures. Corvids were not responsible for nesting failures.

Ograniczanie wyników

Selected aspects of breeding biology in the Tree Sparrow Passer montanus saturatus [Stejneger, 1886] in South Korea

Population density and breeding ecology of the House Martin Delichon urbica in Pomerania [NW Poland]

Nesting ecology of the Spotted Munia Lonchura punctulata in Mudumalai Wildlife Sanctuary [Southern India]

Intrapopulation variation of egg size in the White Stork [Ciconia ciconia] in Southern Poland

Intraspecific brood parasitism in Barn Swallows Hirundo rustica nesting in bunkers

Breeding habitat selection in the House Martin Delichon urbica in the city of Valencia [Spain]

Breeding ecology of the Black-crowned Night Heron in Korea

Breeding biology and ecology of Whinchat Saxicola rubetra on abandoned farmland of Opole Province (SW Poland)

Factors affecting occurrence of Red-backed Shrike (Lanius collurio) and Lesser Grey Shrike (Lanius minor) in low-intensify agriculture areas from Estern Europe

Densities and habitats of the Tawny Pipit Anthus campestris in the Wielkopolska region [W Poland]

Abundance and breeding ecology of Brown Accentors Prunella fulvescens in Lhasa, Tibet

Breeding ecology of Aquatic Warblers Acrocephalus paludicola in their key habitats in SW Belarus

The breeding ecology of the Greenfinch Carduelis chloris in urban conditions [study in Krotoszyn, W Poland]