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Breeding phase and outcome determine space use in European rollers Coracias garrulus prior to migration

Current Zoology 2024年第2期70卷 137-149页

作者： Flavio Monti Sanja Barisic Sebastian Cannarella Davor Cikovic vesna tutis JelenaKralj Carlo Catoni aUniversity of Siena Department of Physical SciencesEarth and EnvironmentVia Mattioli 453100 SienaItaly Institute of Ornithology Croatian Academy of Sciences and ArtsGunduliceva 24HR-1000 ZagrebCroatia Ornis italica Piazza Crati 1500199 RomeItaly

The breeding period is a demanding and time-constrained phase for migratory bird *** outcome and duration can interact with the extent and duration of post-breeding movements,resulting in individual differences in space use ultimately influencing later stages of the annual *** present space-use and home range estimates during the breeding season for 21 European rollers Coracias garrulus tracked between 2018 and 2022,in Italy and *** high-resolution spatial GPS data coupled with regular nest-box monitoring,we analyzed dif-ferences in space use during the incubation/nestling period versus post-breeding period prior to migration,accounting for the breeding outcome(successful ***).We found that adult movements were strongly reduced during the first phase,whereas increased in the post-breeding phase,especially for failed *** breeders remained in the surroundings of the nest site,whereas unsuccessful ones tended to abandon the nest and visit distant areas(up to 500 km)for long periods(60.5±6.2 days).Breeding outcome did not influence the departure date of autumn migration,suggesting that failed breeders used this period for exploratory movements but not for advancing the onset of *** exploratory movements may be functional to prospect and inform settlement decisions in failed breeders in search of new breeding opportunities and may be particularly important in migratory species,which generally have a limited period to gather information prior to autumn *** study demonstrates the need to investigate seasonal movements in different populations and the potential importance of pros-pectingpost-breeding movements for long-distance migratory species.

关键词： animal movement biologging conservation Coracidae Mediterranean nest-box population monitoring prospecting movements reproduction.

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Context dependent song-flight performance and timing in the Black-headed Bunting(Emberiza melanocephala)

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Avian Research 2022年第4期13卷 477-486页

作者： Sanja Barisic Davor Cikovic vesna tutis Jelena Kralj Herbert Hoi Institute of Ornithology Croatian Academy of Sciences and ArtsZagrebGunduliceva 2410000ZagrebCroatia Konrad Lorenz Institute of Ethology Department of Interdisciplinary Life SciencesUniversity of Veterinary Medicine ViennaSavoyenstraße 1A1160ViennaAustria

Many songbirds produce song-flights;however,the function,vocal and motor characteristics,as well as the diel and seasonal variation of song-flight in songbirds remain not well ***,we studied two types of song-flight in male Black-headed Buntings(Emberiza melanocephala),the Moth—a standard,i.e.,perch song produced during a horizontal flight,and the Towering—a specifically structured song produced during a complex ascending and descending *** perch song,used during Moth flight,has already been described,here we provide the first description and sonogram representation of the more elaborate and less stereotyped Towering *** males started to perform Moth song-flights as soon as they arrived at the breeding site,Towering did not start before the female *** usually delivered spontaneous Moth song-flights before chasing rivals or undertaking aerial fights,suggesting Moth is directed towards conspecific males and serves as a threat ***,playback of conspecific perch songs triggered males to approach the loudspeaker with Moth *** Towering started after females arrived at the breeding site,suggesting the Towering is directed towards conspecific *** detected a seasonal difference in the peak Towering rate between forenoon and afternoon,suggesting that Towerings performed at different times of the day have different *** Towerings were strongly positively related to the number of fertile females at the breeding site,while afternoon Towerings peaked very early in the breeding season and coincided with the number of females at the breeding site before the onset of *** results provide evidence that birds can direct different types of song-flight towards different receivers and suggest the possibility that time of the day determines the context of the display,namely to attract social mates or solicit *** work is needed to account for the effect of between male vari

关键词： Fertilisation probability Mate attraction Moth song-flight Towering song-flight

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