Disperse or Stay? Exceptionally High Breeding-Site Infidelity in the Red-Backed Shrike Lanius collurio

[摘要] Nestinginthesamebreedingareainsuccessiveyearsprovidesinformationtohelpunderstandthecuesusedbybirdsinhabitatselection.Moreover,suchinformationmayalsobeanimportanttoolfortheconservationandmanagementofendangeredspecies.Basedontheringingresultsof122adultand1245nestlingRed-backedShrikeLaniuscolluriointheyears1996–2005,westudiedphilopatryofthespeciesintwodifferentpopulations:inwesternandineasternPoland.MoreoverweanalysedallPolishRed-backedShrikeringrecoveriessince1996(n=3102ringedbirds).Wenotedthatbothnatalandbreedingphilopatryinthepopulationswerealmostentirelyabsent.Thisissurprisingincomparisonwithotherstudies,especiallythoseincludingshrikes.Comparisonswithotherpopulationssuggestthatthelackofphilopatryisnotrelatedtothebreedingsuccessoflocalbirdsand/orthesizeofthestudyarea.Incontrast,wesuggestthatlowphilopatryisaneffectofand/oranadaptationtoarelativelyhighpopulationdensityattheland-scapescale,wheremanybreedingareasandpotentialnestingsitesstillremainvacant.

[学科分类] 动物科学

[关键词] Territory Fidelity