Results of the White Stork's counts (Ciconia ciconia L.) in National Nature Park "Pyriatynskyi" and surrounding area

V. Kazannyk, O. Martiusheva, N. Mylenko
Taras Shevchenko National University of Kyiv, Kyiv; Taras Shevchenko National University of Kyiv, Kyiv; National Nature Park "Pyriatynskyi", Pyriatyn

Abstract


The monitoring of population state of White Stork (Ciconia ciconia L.) in the National Nature Park "Pyriatynskyi" and surrounding area was
carried out in 2014–2019. The number of nests in the area was counted and the nest site selection were investigated. A breeding success analysis was also conducted. There were from 86 to 102 nests occupied by storks observed for a six-year study period. The mean number of fledglings in relation to all nest occupying breeding pairs (JZa) was 2,43 ± 0,04 (n = 570), and in relation to breeding pairs with nestlings (JZm) was 2,75 ± 0,04 (n = 502). The percentage of unsuccessful pairs was 10,07 % (%HPo). In different years, breeding success (the proportion of successful pairs with fledglings) ranged from 78,43 % in 2017 to 98,94 % in 2015. The majority of pairs fledged 2 (34,93 %) or 3 (36,92 %) young, that makes 71,85% of broods for total. Broods of 5 nestlings, which is the maximum value for the study area, are rare and registered not every year. Only 4,44% of the total number of such nests was identified for six years. During 2015–2016 storks hatched a smaller number of nestlings, but far more successfully fledged them than in the previous year 2014 and subsequent 2018–2019 years. The year 2017 became the most unfavorable for stork breeding in the region of the park – birds raised the smallest number of fledglings, and the proportion of unsuccessful pairs was the largest for the years of observation. All found nests of a White Stork are located singly within the boundaries of settlements. The preferred nest site is on poles (69,29 % of the total nest number), other types of placement are less common (trees, buildings of various types, water towers and artificial nests). 10 or more nests of storks were recorded in the villages Deimanivka, Povstyn, Antonivka, Usivka and Kaplyntsi located in the floodplain of the Udai river. The average density of nests per settlement was 1,7 ± 0,3 km2.

Keywords


White Stork, Ciconia ciconia, monitoring, breeding success, brood, population state, nest sites, National Nature Park "Pyriatynskyi"

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Received: 10.04.2020

Revised: 11.05.2020

Signed for press: 12.05.2020




DOI: http://dx.doi.org/10.17721/1728_2748.2020.81.11-17

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