Factors Driving Variation in Biparental Incubation Behaviour in the Reed Warbler Acrocephalus scirpaceus

Ardea

Ewelina Klimczuk³  Lucyna Halupka²  Beata Czyż¹  Jacek J. Nowakowski⁴  Hanna Sztwiertnia¹  Marta Borowiec³ 

[1] 3 Department of Behavioural Ecology, University of WrocÅ‚aw, Sienkiewicza 21, 50-335 WrocÅ‚aw, Poland;2 Ornithological Station of WrocÅ‚aw University, Sienkiewicza 21, 50-335 WrocÅ‚aw, Poland;1 Museum of Natural History, University of WrocÅ‚aw, Sienkiewicza 21, 50-335 WrocÅ‚aw, Poland;4 Department of Ecology and Environmental Protection, University of Warmia and Mazury in Olsztyn, Plac Łodzki 3, 10-727 Olsztyn, Poland

关键词: Environmental Factors;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Biparentalincubationisacommonpatternofparentalcareinbirds.Withinspecieswithbiparentalincubation,thecontributionofeachsexcanvarywidely.Manystudieshaveaddressedthefactorsthatinfluencevariationinfemaleincubationbehaviour,buttheunderlyingcausesofwithin-speciesvariationinmaleincubationbehaviourremainpoorlyunderstood.InthispaperweanalyseincubationbehaviourintheReedWarbler,asmall,predominantlysociallymonogamouspasserinenestinginreedbeds.Weexaminedtheimpactoftimeofday,weatherconditions(ambienttemperature,windspeed,rainfall)andprogressofthebreedingseasononmaleandfemaleincubationbehaviourin81pairsofReedWarblerbreedingintheBaryczValley(SWPoland).Wefoundthatfemaleshadonaveragehighernestattentiveness(totaltimespentincubatingperhour)thantheirpartners(47%vs.29%)butmeanincubationboutlength(asingle,uninterruptedstayatthenest)didnotdiffersignificantlybetweenthesexes(9minvs.7min).Thetwoparentsrespondeddifferentlytochangingenvironmentalparameters.Femalenestattentivenesswasunaffectedbydate,timeoftheday,advancementofincubationandweatherconditions,whilemalesspentmoretimeonthenestathigherwindspeedsandlowertemperatures.Incontrast,maleincubationboutlengthwasnotaffectedbythesefactors,whereasfemaleboutlengthincreasedthroughoutthebreedingseasonandwaslongeratlowertemperatures.Incubationrecesses(periodswherebothparentswereoffthenest)werelongerduringfavourableweatherconditions(athightemperaturesandlowwind),probablybecausecoolingoftheeggstakesmuchlongerundersuchconditionsandparentscanspendmoretimeforaging.Acomparisonofourresultswiththosefromotherpopulationsrevealedimportantbetweenpopulationandsex-specificdifferencesinnestattentivenessexpressedasthepercentageofmale/femaletimespentonthenest.Wesuggestthatbetweenpopulationvariationmayresultfromdifferencesinhabitatqualityand/orfoodresourcesaffectingthenecessityofmalecontributiontoparentalcare,variationinbreedingsynchronyanddensitiesinfluencingmaleengagementinextra-paircopulations,differencesinpredationlevels,ormethodologicaldifferences.

【 授权许可】

Unknown