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首页> 外文期刊>Acta zoologica Academiae Scientiarum Hungaricae >EXPLORATORY ANALYSES OF FORAGING HABITAT SELECTION OF THE RED-FOOTED FALCON (FALCO VESPERTINUS)
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EXPLORATORY ANALYSES OF FORAGING HABITAT SELECTION OF THE RED-FOOTED FALCON (FALCO VESPERTINUS)

机译：红脚猎鹰（FALCO VESPERTINUS）的觅食生境选择的探索性分析。

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摘要

The foraging habitat selection of Red-footed Falcons (Falco vespertinus) was investigated in a characteristic Hungarian habitat between 2006–2008. Potentially available habitat types were assessed within a 10 km~2 study site with remote sensing technologies. Altogether 18 adult birds were equipped with tail-mount VHF radio-tags and individually followed until visual contact to record location and foraging behaviour. Foraging areas were assessed with 100% Minimum Convex Polygons (MCP), global Manly’s selectivity measures were used to detect population level habitat preference, and the eigenanalysis of selection ratios was carried out to partition the variability in individual habitat preference. We found large individual variability in the extent of foraging areas. Females had significantly smaller foraging areas compared to males, while males at the largest colony had significantly larger foraging areas compared to males of the smaller colonies. Global Manley’s selectivity measures showed that birds significantly avoided intertilled crops, water surface, woods and artificial surfaces. The eigenanalysis of selection ratios partitioned individual habitat selection rates into two distinct groups; the first using grasslands and alfalfa while the second group of birds preferring grasslands and cereals. Positive habitat preference towards arable habitat types, indicate that species specific conservation efforts of this declining raptor should also focus on agricultural land use practices.
机译：在2006–2008年之间的匈牙利特色栖息地中调查了红脚猎鹰（Falco vespertinus）觅食的栖息地选择。在10 km〜2的研究场地内，使用遥感技术评估了潜在的可用栖息地类型。共有18只成年鸟类配备了尾部安装的VHF无线电标签，并逐个跟踪直到目视接触以记录位置和觅食行为。用100％最小凸多边形（MCP）评估了觅食区域，使用了全球曼利（Manly）的选择性测度来检测种群水平的栖息地偏好，并对选择比率进行了特征分析，以划分各个栖息地偏好的变异性。我们发现在觅食区域范围内个体差异很大。与雄性相比，雌性的觅食面积明显小于雄性，而最大菌落的雄性的觅食面积明显大于雄性。 Global Manley的选择性措施显示，鸟类极大地避免了农作物，水面，木材和人造表面的干扰。选择率的特征分析将单个生境的选择率分为两个不同的组。第一组使用草原和苜蓿，而第二组鸟类更喜欢草原和谷类。对可耕生境类型的积极的生境偏爱表明，这种下降的猛禽对物种的具体保护工作也应侧重于农业土地利用实践。

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