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Migration routes and strategies of Grey Plovers (Pluvialis squatarola) on the East Atlantic Flyway as revealed by satellite tracking

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Avian Research 2019年第3期10卷 305-318页

作者： Klaus-Michael Exo Franziska Hillig Franz Bairlein institute of Avian Research Vogelwarte Helgoland

Background:While the general migration routes of most waders are known,details concerning connectivity between breeding grounds, stopover sites and wintering grounds are often *** information is critical from the conservation perspective and necessary for understanding the annual *** are especially needed to identify key stopover sites in remote regions. Using satellite transmitters, we traced spring and autumn migration routes and connectivity of Grey Plovers on the East Atlantic *** findings also revealed the timing,flight speed, and duration of migrations. Methods:We used ARGOS satellite transmitters to track migration routes of 11 Grey Plovers that were captured at the German Wadden Sea where they had stopped during *** were monitored for up to 3 years,***:Monitoring signals indicated breeding grounds in the Taimyr and Yamal regions;important staging sites on the coasts of the southern Pechora Sea and the Kara Sea;and wintering areas that ranged from NW-Ireland to Guinea *** average distance traveled from wintering grounds to breeding grounds was 5534 km. Migration duration varied between 42 and 152 days;during this period birds spent about 95% of the time at staging *** spring most plovers crossed inland Eastern Europe, whereas in autumn most followed the *** all of the birds departed during favorable wind conditions within just 4 days (27-30 May) on northward migration from the Wadden *** spring birds migrated significantly faster between the Wadden Sea and the Arctic than on return migration in autumn (12 vs.37 days),with shorter stopovers during the northward ***:Our study shows that satellite tags can shed considerable light on migration strategies by revealing the use of different regions during the annual cycle and by providing detailed quantitative data on population connectivity and migration timing.

关键词： Annual cycle Long-distance migration Migration speed Migration strategy Migration timing Satellite transmitters Shorebirds Tracking Stopover

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Offshore wind-parks and birds: estimating flight altitudes of birds over sea by combining diverse data from radar and visual observations

Offshore wind-parks and birds: estimating flight altitudes o...

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23rd International Ornithological Congress

作者： Helmut Wendeln Ommo Hüppop Wilhelm Ruhe institut fur vogelforschung “vogelwarte helgoland” An der Vogelwarte 21 D-26386 Wilhelmshaven Germany institut fur vogelforschung “vogelwarte helgoland” Inselstation Helgoland P.O. Box1220 D-27494 Helgoland Germany Amt fur Wehrphysik Mont Royal D-56841 Traben-Trarbach Germany

＜正＞ Producing electricity from large offshore wind-parks is an economically promising development in Germany. However, little is known of the potential effects of the parks on birds, either on those that might roost or forage there or on passage migrants. Towards minimising potentially deleterious impacts, we set out to obtain information about bird movements in the North and Baltic Seas in space and time, and about the altitudinal distribution of flying birds. Previous data on the heights at which birds fly over the seas came from large-scale

关键词： migration flight altitude radar offshore wind-parks

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Factors determining stopover decisions in migrating passerines on a small island

Factors determining stopover decisions in migrating passerin...

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23rd International Ornithological Congress

作者： Volker Dierschke Inst. vogelforschung “vogelwarte helgoland” D-27494 Helgoland Germany

＜正＞ During migration between breeding and wintering areas, many passerines stop over on the small offshore island helgoland （North Sea） in spring and autumn. There, about 50 km offshore, a bird of passage has no opportunity to search for any suitable surrounding habitat, and has to decide whether local conditions for resting/refuelling are adequate or to depart and continue migration forthwith. Several factors possibly influencing this decision were investigated in a five-year study of several species, the main target of which was the Northern Wheatear

关键词： stopover ecology departure decision passerine migration

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Migration phenology determines niche use of East Asian buntings (Emberizidae)during stopover

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Current Zoology 2018年第6期64卷 681-692页

作者： Wieland HEIM Jana A.ECCARD Franz BAIRLEIN institute of Landscape Ecology Munster UniversityHeisenbergstraβe 2Munster48149Germany Animal Ecology Institute of Biology and BiochemistryUniversitat PotsdamMaulbeerallee 1Potsdam14469Germany institute of Avian Research "vogelwarte helgoland" An der Vogelwarte 21Wilhelmshaven28386Germany

Stopover niche utilization of birds during migration has not gained much attention so far,since the majority of the studies focuses on breeding or wintering ***,stopover sites are crucial for migratory *** are often used by a multitude of species,which could lead to increased *** this work,we investigated niche use of 8 migratory and closely related Emberiza bunting species at a stopover site in Far East Russia,situated on the poorly studied East Asian *** used bird ringing data to evaluate morphological similarity as well as niche overlap on the trophic,spatial,and temporal *** morphology was used as a proxy for their trophic *** were able to prove that a majority of the species occupies well-defined stopover niches on at least one of the *** breadth and niche overlap differ between spring and autumn season with higher overlap found during *** differences are mostly related to overall size and wing *** temporal dimension is most important for segregation among the studied ***,all species seem to exhibit a rather strict and consistent phenological *** occurrence at the study site is highly correlated with their geographic origin and the length of their migration *** assume that buntings are able to use available resources opportunistically during stopover,while trying to follow a precise schedule in order to avoid competition and to ensure individual fitness.

关键词： bird migration Emberiza habitat use non-breeding phenology stopover

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Revealing the control of migratory fueling： An integrated approach combining laboratory and field studies in northern wheatears Oenanthe oenanthe

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Current Zoology 2013年第3期59卷 381-392页

作者： Franz BAIRLEIN Volker DIERSCHKE Julia DELINGAT Cas EIKENAAR Ivan MAGGINI Marc BULTE Heiko SCHMALJOHANN institute of Avian Research "vogelwarte helgoland" Wilhelmshaven Germany Gavia EcoResearch Toennhaeuser Dorfstr. 20 21423 Winsen (Luhe) Germany Advanced Facility for Avian Research University of Western Ontario 1151 Richmond Street London ON N6G 1G9 Canada

Migratory birds rely on fueling prior to migratory flights. Fueling in migrants is controlled by intrinsic as well as ex- trinsic factors. From captive studies we have started understanding the internal mechanisms controlling bird migration. Field studies have demonstrated the effects of external factors, such as food availability, weather, competitors, parasites or diseases, on the stopover behavior of migrants. However, an integrated approach is still missing to study coherently how the innate migration program interacts with the varying environmental cues and to estimate the contribution of the innate migration program and the environment to realized migration. The northern wheatear Oenanthe oenanthe offers a unique opportunity for integrated studies. It breeds across almost the whole Holarctic with just a ＂gap＂ between eastern Canada and Alaska. All breeding populations over- winter in sub-Saharan Africa which makes the northern wheatear one of the most long-distant migratory songbirds with extraor- dinary long non-stop flights across oceans. It is a nocturnal migrant which travels without parental or social aid/guidance. Thus, young birds rely entirely on endogenous mechanisms of timing, route selection and fueling on their first outbound migration. By establishing indoor housing under controlled conditions the endogenous control mechanisms of northern wheatear migration could be revealed. At the same time, environmental factors controlling fueling could be investigated in the field. On migration wheatears occur in a variety of habitats with sparse vegetation where their stopover behavior could be quantitatively studied in the light of ＂optimal migration＂ theory by the use of remote balances, radio-tagging and even experimentally manipulated food availability. The present paper summarizes our approach to understand the control of migration in northern wheatears by combin- ing field and laboratory studies at various spatial and temporal scales, and linking vario

关键词： Oenanthe oenanthe Fueling Stopover Optimal migration Predation risk Endogenous control Innate program Nocturnal restlessness Corticosterone

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