首页> 外文期刊>Slovak Raptor Journal >Semicolonial nesting and conservation of the Montagu's harrier Circus pygargus in rapeseed fields in Southern Podlasie (eastern Poland)
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Semicolonial nesting and conservation of the Montagu's harrier Circus pygargus in rapeseed fields in Southern Podlasie (eastern Poland)

机译:南部波德莱西(波兰东部)油菜田中蒙塔古猎兔犬 pygargus 的半殖民地嵌套和保护

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摘要

Agrocoenosis are important nest sites for Montagu's harriers. In 2009, a large semicolony of 14 Montagu's harrier pairs was recorded in a rapeseed field in eastern Poland. The breeding colony arose due to a shortage of crops of suitable height in the period of nest building, caused by unfavourable weather conditions and a delayed onset of vegetation growth. The mean clutch size and hatchling number was 3.62, and the mean number of chicks in pairs that bred successfully was 2.00. Losses in broods due to predation and farming treatments were low (2% and 6%, respectively).
机译:农杆菌病是蒙塔古s的重要巢穴。 2009年,在波兰东部的一个油菜田中记录了14对蒙塔古猎兔犬的大型分群。由于不利的天气条件和植被生长的延迟,筑巢期间出现了适当高度的农作物短缺,因此产生了繁殖地。平均离合器大小和孵化数量为3.62,成对成功繁殖的成对小鸡平均数量为2.00。掠食和耕作造成的亲鱼损失很低(分别为2%和6%)。

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