Pre-Migratory Movements by Juvenile Burrowing Owls in a Patchy Landscape

Avian Conservation and Ecology

R. Mark Brigham,¹  L. Danielle Todd,¹  Troy I Wellicome,²  Erin M Bayne,³  Ray G Poulin,⁴ 

[1] Biology Department, University of Regina;Environment Canada, Canadian Wildlife Service - Prairie and Northern Region;Integrated Landscape Management Group, University of Alberta;Royal Saskatchewan Museum

关键词: Athene cunicularia;    Burrowing Owl;    habitat fragmentation;    natal dispersal;    post-fledging disperal;    pre-migratory dispersal;    supplemental food;   

DOI  :  10.5751/ACE-00174-020204

学科分类：社会科学、人文和艺术（综合）

来源: Resilience Alliance Publications

【 摘 要 】

Dispersal is a fundamental aspect of population dynamics, and can have direct implications on processes such as the colonization of habitat patches. Pre-migratory movements, landscape fragmentation, and body condition have all been hypothesized as key factors influencing dispersal in birds, but little direct evidence exists to support these ideas. We used radio-telemetry and supplementary feeding to test if body condition or landscape pattern influenced pre-migratory movements of juvenile Burrowing Owls (Athene cunicularia) in a fragmented landscape. We categorized grassland patches as either large (≥95 ha) or small and isolated (≤58 ha and ≥1.5 km to next nearest grassland patch), and young owls were either provided supplemental food as nestlings or not.Owlets receiving supplemental food and residing in large grassland patches moved a greater maximum distance from their nest than similarly fed owlets residing in small patches (large = 1605

【 授权许可】

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