Predators and Predation Rates of Skylark Alauda arvensis and Woodlark Lullula arborea Nests in a Semi-Natural Area in the Netherlands

Ardea

Libor Praus¹  B. Irene Tieleman²  Karel Weidinger¹  Arne Hegemann² 

[1] 1 Department of Zoology and Laboratory of Ornithology, Faculty of Science, Palacky University, 17. listopadu 50, 771 46 Olomouc, Czech Republic;2 Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, P.O. Box 11103, 9700 CC Groningen, The Netherlands

关键词: Video Monitoring;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Predationisamajorcauseofbreedingfailureinbirdspecieswithopennests.Althoughmanystudieshaveinvestigatednestpredationrates,directidentificationofnestpredatorsissporadic,especiallyin(semi-)naturalhabitats.WequantifiednestsuccessandidentifiednestpredatorsinapopulationofSkylarksAlaudaarvensisandWoodlarksLullulaarboreabreedinginaprotectedsemi-naturalareadominatedbyheathlandanddifferentsuccessionstatesofgrasslandonnutrient-poorsoilinTheNetherlands.Wemonitored54nestsbymeansofcontinuousvideosurveillancetodeterminesurvivaltimesandpredators,andmonitoredanother44nestswithoutacamera.Fatesofthe58(40)Skylark(Woodlark)nestswere:fledging41(27),depredation13(12),eggdesertion1(0)andnestlingdeath3(1).Theoverallnestsuccessofallmonitorednests(58(40),Mayfieldestimate)was33%(22%;allmortalityfactorsconsidered)or43%(25%;onlydepredation).PredatorsofSkylarknestswereRedFoxVulpesvulpes(5),CarrionCrowCorvuscorone(1)andEuropeanAdderViperaberus(1).WoodlarknestsweredepredatedbyCarrionCrow(2),EurasianJayGarrulusglandarius(1)andRedFox(1).Resultssuggestthatthemainnestpredatorsmightdifferbetweenthetwoco-occurringlarkspecies;SkylarknestslocatedinmoreopensiteswerepreyeduponmainlybyRedFox,whilethemainpredatorsofWoodlarknests,locatedgenerallyclosertotrees,arecorvids.

【 授权许可】

Unknown