Results of counting the nests of white stork (Ciconia ciconia) in the former Bełchatów and Sieradz Districts

Autor: Bartyzel, Piotr, Kamerdyn, Czeslaw
Přispěvatelé: Piotr Bartyzel - Muzeum Białowieskiego Parku Narodowego
Jazyk: polština
Rok vydání: 1992
Předmět:
Popis: 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. Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 dofinansowane zostało ze środków MNiSW w ramach działalności upowszechniającej naukę.
Databáze: OpenAIRE