Nest-Site Selection and Nest Predation in the Great Bittern Botaurus stellaris Population in Eastern Poland
[摘要] Thisstudyanalysestheeffectsofnest-siteselectiononpredationriskofGreatBitternBotaurusstellarisnests.ThestudywasconductedinfishpondsofeasternPolandduringfourbreedingseasons(2003–06).Thehabitatcharacteristicsof84nestsiteswereinvestigated.NestingsiteswerefoundwithinPhragmites,typha,CarexandScirpusvegetationinthereedbeltsurroundingthefishponds.Allnestswerebuiltatplaceshavingbetween10and97cmofwaterdepth.Predationwasthemajorcauseofnestfailureinthestudypopulation.However,norelationshipbetweennestsitevegetationtypeanddailynestsurvivalratewasfound.Thesurvivalofnestsatedgesandintheinteriorofreedbedswassimilar.AlogisticregressionmodelindicatedsignificanteffectsofwaterdepthandvegetationcoveronnestpredationintheBitternpopulation.Therewasatendencytowardsbettersuccessfornestsindenseemergentvegetationwithhigherwaterdepth.Theresultshaveimportantimplicationsforaneffectiveconservationstrategyforwetlandsholdinglargeandviablepopulationsofthisvulnerablespecies.
[发布日期] [发布机构]
[效力级别] [学科分类] 动物科学
[关键词] Habitat Selection [时效性]
