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- W2038103600 abstract "In 2005–2011 active conservation and study on the population of the Montagu’s Harrier was conducted in the farmland areas of east-central Poland. The population was estimated at 240–270 breeding pairs and its size was stable. The mean clutch size was estimated at 3.71 eggs per breeding pair. The number of fledglings was 1.24 per nest and 2.6 per successful breeding pair. There were no significant differences in sex ratio. The birds nested mainly in winter cereal and rape (70%). Population productivity positively correlated with a high number of nests located in late harvested crops. The pairs breeding in early harvested crops had significantly lower breeding success (10%) than the pairs nesting in winter cereal (>70%), due to losses during farming activities. Protection of broods with fencing had a positive effect on the breeding success of pairs nesting on arable fields. An important factor that had a negative impact on the breeding success of Montagu’s Harriers was adverse weather conditions. 2005–2011 metais buvo vykdoma pievinių lingių intensyvi apsauga ir rūšies populiacijos tyrimai rytų centrinės Lenkijos dirbamuose laukuose. Pievinių lingių populiaciją sudarė 240–270 perinčių porų, vidutinis dėties dydis – 3,71 kiaušiniai vienai perinčiai porai, jauniklių skaičius – 1,24 jaunikliai vienam lizdui ir 2,6 jaunikliai vienai sėkmingai perėjusiai porai. Ryškaus skirtumo tarp patinų ir patelių skaičiaus nepastebėta. Paukščiai daugiausiai perėjo žieminių kultūrų ir rapso laukuose (70%). Populiacijos produktyvumas teigiamai koreliavo su dideliu lizdų skaičiumi laukuose, kur derlius nuimamas vėlai. Dėl aktyvios žemės ūkio veiklos perėjimo sėkmė buvo žymiai mažesnė laukuose, kur derlius nuimamas anksti (10%), nei žieminėse kultūrose (>70%). Lizdų aptvėrimas turėjo teigiamos įtakos dirbamuose plotuose perėjusių porų perėjimo sėkmei. Nepalankios oro sąlygos darė didelę neigiamą įtaką pievinių lingių perėjimo sėkmei." @default.
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- W2038103600 date "2012-06-01" @default.
- W2038103600 modified "2023-09-25" @default.
- W2038103600 title "Breeding biology of the Montagu’s Harrier (<i>Circus pygargus</i>) in east-central Poland and implications for its conservation" @default.
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- W2038103600 doi "https://doi.org/10.1080/21658005.2012.699744" @default.
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