http://hdl.handle.net/11089/13057 2026-04-05T01:03:59Z 2026-04-05T01:03:59Z Bartyzel, Piotr Kamerdyn, Czeslaw http://hdl.handle.net/11089/13157 2018-02-01T11:19:43Z 1992-01-01T00:00:00Z

Wyniki liczenia gniazd bociana białego (Ciconia ciconia) na terenie byłych powiatów Bełchatów i Sieradz Bartyzel, Piotr; Kamerdyn, Czeslaw In 1984 the nests of the White Stork in the area of the former Bełchatów District (734 km2) and a part of the former Sieradz District (about 720 km2) were investigated. Comparisons were based on questionnaire data from 1968-1970 and on an inspection from 1974. 42 (5.72 nests /100 km2) and 35 (4.86 nests/km 2) nests, respectively, occupied by pairs were recorded. In the whole course of the investigated period the percentage of nests with no breeding success (HPo) increased exponentially. Changes in the efficiency of breeding from year to year resulted mainly in changes in the differences in the percentages of nests having extreme numbers of young birds which had left the nests. A negative influence of the mine upon the efficiency of breeding of stork nesting within an area adjoining a strip brown coal mine was proved.

1992-01-01T00:00:00Z Gabryelak, Jacek http://hdl.handle.net/11089/13155 2018-02-01T11:19:36Z 1992-01-01T00:00:00Z

Bocian biały (Ciconia ciconia) na terenie byłego powiatu łaskiego w roku 1984 Gabryelak, Jacek The White Stork bred in the former district of Łask in 1984 at a density of 5.16 pairs/100 km 2. The mean number of nestlings per nest occupied by a pair was 2.10 and the mean number of nestlings per nest with nestlings was 2.62. 86% of nests were situated on trees and 95% of them were up to 100 m from buildings. Num ber of nests occupied by pairs and by pairs with nestlings in 1984 was lower than in 1970 by about 20%.

1992-01-01T00:00:00Z Wojciechowski, Zbigniew Markowski, Janusz http://hdl.handle.net/11089/13114 2018-02-01T11:19:58Z 1992-01-01T00:00:00Z

Charakterystyka wybranych parametrów populacyjnych bociana białego (Ciconia ciconia) w środkowej Polsce Wojciechowski, Zbigniew; Markowski, Janusz On the basis of the so far collected and/or published data on the White Stork of central Poland (the Łódź Upland) the authors undertook an attempt to explain the spatial and tem poral distribution of breeding efficiency, population density as well as nests localization and nest distribution in relation to human settlements. The efficiency of White Stork breeding depends on biotopic conditions and interspecific competition. Precipitation in spring has a positive while precipitation and low temperatures in June a negative impact on interspecific competition. Habitat conditions of the White Stork have begun to display a constant tendency to decrease in quality, mainly due to land draining. The interspecific competition depends on biotopic conditions and on density. Optimal habitat conditions, including weather ones, may largely neutralize the impact of the intraspecific competition, which enables the population an increase in density, leading even to the appearance of aggregations and colonies. A deterioration in habitat conditions increases interspecific competition, which decreases breeding success to a lower extent than that which could be expected, caused decomposition of aggregations and decrease in the density of breeding pairs. The appearance of a nest outside of the settlement area is a result of interspecific competition.

1992-01-01T00:00:00Z Zuchniewicz, Andrzej http://hdl.handle.net/11089/13112 2018-02-01T11:19:36Z 1992-01-01T00:00:00Z

Bocian biały (Ciconia ciconia) na terenie Ziemi Łęczyckiej Zuchniewicz, Andrzej A comparison of studies on the distribution and breeding efficiency of the White Stork in the Łęczyca District in 1968-1970, 1975 and 1984 is presented. In the analysed period, there occurred a significant increase in the abundance of nests not occupied by pairs (HO + HB) and in nests built on the poles of electric traction. The spatial distribution of stork nests is described. Besides, the author proves the limiting influence of interspecific com petition on the breeding success of the stork in the distinguished groupings of nests.

1992-01-01T00:00:00Z