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Diet of the Montagu's Harrier Circus pygargus nesting in natural habitat in Eastern Spain

机译:在西班牙东部自然栖息地筑巢的Montagu的马戏团pygargus的饮食

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摘要

We describe the diet of theMontagu's Harrier (Circus pygargus) population breeding in inland Castellón province (eastern Spain), which exhibits among the highest breeding productivity of European populations of this species.We assessed diet using pellets collected at nests at the end of the breeding season. We recorded the minimum number of items in every pellet for six prey classes (lizards, passerines, small mammals, coleopterans, orthopterans and other insects).We also analyzed between-year relationships in diet diversity and breeding output at the nest level. The most frequently eaten prey were insects, particularly large orthopterans of the family Acrididae. Passerines were also abundant in the diet and contributedmore than 50% of the consumed biomass.We found no significant between-year relationship in breeding output and diet diversity at the nest level. Further studies on prey availability in different habitat types would be needed in order to understand how land-use changes affect the Montagu's Harrier population.
机译:我们描述了内陆卡斯特利翁省(西班牙东部)蒙塔古s(Circus pygargus)种群的饮食,该种群在欧洲该物种的欧洲种群中具有最高的繁殖效率。季节。我们记录了六个猎物类别(蜥蜴,雀形目,小型哺乳动物,鞘翅目,直翅目昆虫和其他昆虫)中每个颗粒中的最小项目数量,还分析了日粮在巢中的多样性和繁殖产量之间的年际关系。最常吃的猎物是昆虫,尤其是Ac科的大型直翅类动物。雀形目在日粮中也很丰富,占消耗的生物量的50%以上。我们发现在巢水平,繁殖产量和日粮多样性之间没有显着的年际关系。为了了解土地用途的变化如何影响蒙塔古gu族人口,需要进一步研究不同生境类型中的猎物可利用性。

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