Stopover Behaviour and Dominance: A Case Study of the Northern Wheatear Oenanthe oenanthe

Ardea

Franz Bairlein¹  Heiko Schmaljohann¹  Juan Arizaga¹ 

[1] 1 Institute of Avian Research “Vogelwarte Helgoland”, An der Vogelwarte 21, D-26386 Wilhelmshaven, Germany

关键词: Territoriality;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Inmigrantsthatoccupyanddefendterritoriesduringmigration,socialstatuscandetermineaccesstopreferredresourcesandalterstopoverbehaviour.ThepotentialvariationinstopoverbehaviourbetweendominantandsubordinateindividualsoftheNorthernWheatearOenantheoenanthe,aterritorialmigrantbirdspecies,wasexaminedatanoffshorestopoverareaontheislandofHelgolandduringthespringof2009.Overall,territorieswereoccupiedanddefendedbydominantbirds(identifiedasthosethatwon≥50%oftheconspecificaggressiveencounters).Dominantbirdsalsoinitiatedmostconspecificaggression.Unabletosettleanddefendaterritory,subordinatestendedtobevagrantandstoppedoverforshorterperiodsoftime.Thisislikelyduetothefactthatsubordinateswerecontinuouslydisplacedbydominants,andthereforehadlessaccesstofood.Subordinatesalsotendedtoforageatlowerrates.NorthernWheatearswereprimarilyfoundinzoneswithahighernumberofshelters,supportingtheideathatavoidanceofpredationplaysaroleinsiteselection.

【 授权许可】

Unknown