In the Blackcap Sylvia atricapilla Last-Hatched Nestlings Can Catch up with Older Siblings

Ardea

Ewa WÄ™grzyn¹ 

[1] 1 Department of Zoology, University of Rzeszów, Zelwerowicza 4, 35-959 Rzeszów, Poland ([e-mail])

关键词: Eurasian Blackcap;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Developmentduringtherelativelyshorttimethatyoungspendinthenestiscrucialinabird'slifehistory.Therateofnestlinggrowthstronglydependsonnumerousenvironmentalandsocialfactors,evenwithinthesamespeciesorpopulation.InthepresentstudyIexaminetherelativecontributionsofbroodsize,hatchingasynchrony,hatchingdateandfeedingrateindeterminingintraspecificvariationinthegrowthofEurasianBlackcapSylviaatricapillanestlings.Ifoundasignificanteffectofbroodsize,hatchingorderanddateonnestlingdevelopment.However,theeffectofhatchingorderanddatewassignificantonlyforyoungnestlingsanditgraduallydisappearedwithnestlingage.Theonlyfactorsignificantlyaffectingnestlingdevelopmentjustbeforefledgingwasbroodsize.Nestsoffoursiblingsproducedtheheaviestyoungwiththelongesttarsi.Thisprobablyresultedfromthehighestfeedingratepernestlingobservedinbroodsoffournestlings.ThestudyshowsthatforBlackcapsbreedinginagoodyearabroodsizeoffouristheoptimalnumber,andthatyoungersiblingscancatch-upwitholdernestmates.

【 授权许可】

Unknown