Estimation of Flight Range of Migrant Leaf-Warblers at Lake Baikal

Bozó, László; Csörgő, Tibor; Anisimov, Yury

doi:10.13157/arla.67.1.2020.sc1

Cited by 6 publications

(7 citation statements)

References 34 publications

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“…However, in the last two decades the most studied group in Asia were the leaf warblers. We have detailed information on breeding ecology (e.g., Price and Jamdar 1991;Bourski and Forstmeier 2000;Forstmeier et al 2001a;Forstmeier 2002;Forstmeier and Balsby 2002), habitat use, morphology and foraging strategies (Price 1991;Forstmeier et al 2001b;Katti and Price 2003;Batova 2011;Bozó et al 2018a), the sex-specific timing of migration (Bozó and Heim 2016), the effect of weather variables on the migration (Bozó et al 2018b) and the estimated migration distances (Sander et al 2017;Bozó et al 2019) of these species. However, the factors that influence the observed differences in migration phenology have not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

Factors controlling the migration phenology of Siberian Phylloscopus species

2020

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The timing of annual events in migratory species is determined by the position of breeding and wintering grounds, length of the breeding season, the occurrence of their preferred diet or the timing of moult in birds. Previous studies found significant differences in the migration phenology of Asian Phylloscopus warbler species, a group of long-distance migratory passerines. However, the factors that influence the observed differences in migration phenology have not been studied yet. Here, we analyze the effect of the above-mentioned factors on the migration timing of seven Phylloscopus species at a stopover site in the Russian Far East. We found that spring migration phenology was best explained by moult strategy and the preferred prey size, while autumn migration phenology was linked to the southernmost wintering latitude of the species. Interspecific differences in migration timing were much higher in autumn than in spring. The duration of the species-specific migration periods was also longer in autumn than in spring, most likely caused by higher competition during spring to arrive early at the breeding grounds. Our results contribute to the understanding of migration ecology in songbirds moving along the little-studied East Asian flyway. Keywords Leaf warbler • Migration strategies • East Asian flyway • Diet Zusammenfassung Welche Faktoren bestimmen die Zugphänologie sibirischer Laubsänger? Der Jahreszyklus ziehender Arten wird von der Lage der Brut-und Überwinterungsgebiete, der Länge der Brutsaison, der Verfügbarkeit bevorzugter Nahrung oder dem Zeitraum der Mauser bestimmt. Vorhergehende Studien fanden signifikante Unterschiede in der Zugphänologie von asiatischen Laubsängern, einer Gruppe von Langstreckenziehern. Die Ursachen für die beobachteten Unterschiede wurden bisher jedoch noch nicht untersucht. Hier analysieren wir den Einfluss der oben genannten Faktoren auf das zeitliche Auftreten von sieben Laubsänger-Arten an einem Zwischenrastplatz im Fernen Osten Russlands. Im Frühjahr konnten die Unterschiede in der Phänologie der Arten am besten mit der Mauserstrategie und der Größe der bevorzugten Nahrung erklärt werden, während die Phänologie des Herbstzuges mit dem südlichsten Breitengrad des Überwinterungsgebietes erklärt werden konnte. Die zeitlichen Unterschiede zwischen den Arten waren im Herbst größer als während des Frühjahrszuges. Die artspezifischen Zugperioden waren im Herbst ebenfalls länger als im Frühjahr. Dies kann mit der Konkurrenz um ein möglichst zeitiges Ankommen in den Brutgebieten erklärt werden. Unsere Ergebnisse tragen zu einem besseren Verständnis der Zugökologie von Singvögeln des wenig untersuchten ostasiatischen Zugweges bei. Communicated by N. Chernetsov.

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Section: Introductionmentioning

confidence: 99%

Factors controlling the migration phenology of Siberian Phylloscopus species

2020

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“…The lack of relevant ecogeographic barriers between Tömörd and the Dinaric Alps (Csörgő et al 2009), which forces birds to migrate for several consecutive nights (Schmaljohann et al 2007), maybe one of the main causes for the relatively low variation in the MS of migrant passerines passing through western Hungary. Bozó et al (2019) estimated the flight ranges of three migrant warbler species at a stopover site next to Lake Baikal, Russia. The estimated flight ranges of the Pallas' Leaf Warbler (Ph.…”

Section: Discussionmentioning

confidence: 99%

“…In the absence of recaptures and the high cost of geolocators, other methods are needed to identify migration routes and stopover or wintering sites. The most cost-effective method is to estimate flight ranges and fuel loads based on biometric parameters such as wing length, body mass and body fat (Csörgő & Halmos 2002, Delingat et al 2008, Arizaga et al 2013, Sander et al 2017, Bozó et al 2019. Body fat is the primary and best metabolic reserve for migratory birds (McWilliams et al 2004): maintaining adipose tissue requires much less energy than maintaining skeletal muscle and liver tissue (Scott & Evens 1992).…”

Section: Introductionmentioning

confidence: 99%

Fuel load and flight range estimation of migrating passerines in the western part of the Carpathian Basin during the autumn migration

Gyurácz

Bánhidi²,

Góczán³

et al. 2023

Acta Zool. Acad. Sci. Hung.

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Estimating fuel load and potential flight ranges of migrant passerines are basic issues in understanding bird migration strategies. Thirteen sub-Saharan and three pre-Saharan migrant passerine species were analysed in this study. The birds were captured at the Tömörd Bird Ringing Station in the western part of the Carpathian Basin. A general linear model with body mass as the dependent variable and fat score, muscle score and wing length as independent variables were used to estimate lean body mass (body mass without fuel deposits) and fuel load. In ten of the species studied, models considering interactions between factors fit the data better than the main-effect models. Body mass was positively correlated with the fat score in all species, with muscle score in ten species and wing length in 14 species. During autumn, fuel load tended to be larger in the sub-Saharan migrants, especially in four species which pass over the Mediterranean Sea, Common Nightingale (Luscinia megarhynchos), Icterine Warbler (Hippolais icterina), Garden Warbler (Sylvia borin) and Barred Warbler (Curruca nisoria). Nine sub-Saharan migrants, Marsh Warbler (Acrocephalus palustris), Sedge Warbler (A. schoenobaenus), Eurasian Reed Warbler (A. scirpaceus), European Pied Flycatcher (Ficedula hypoleuca), Spotted Flycatcher (Muscicapa striata), Wood Warbler (Phylloscopus sibilatrix), Willow Warbler (Ph. trochilus), Common Whitethroat (C. communis) and Lesser Whitethroat (C. curruca) had estimated flight ranges similar (<1300 km) to two pre-Saharans, European Robin (Erithacus rubecula) and Eurasian Blackap (S. atricapilla). The three short-distance migrants, including the Common Chiffchaff (Ph. collybita) with the shortest distance, had sufficient fuel load to reach their southern European wintering sites without needing to refuel at stopover sites.

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“…A similar migration strategy seems to be a frequently used pattern in nocturnal passerine migrants flying across continental Europe where widespread fueling opportunities exist (Bairlein, 1995; Delingat et al., 2006; Ozarowska, 2015; Schaub & Jenni, 2000a; Stepniewska et al., 2018). Recent studies found huge variation in fuel loads among migratory warblers in East Asia, with comparatively low fuel loads in the Pallas´s Grasshopper Warblers (Bozo et al., 2020; Sander et al., 2017, 2019). Further support for an autumn migration with low fuel loads is found by individuals examined at the stopover site in Hong Kong.…”

Section: Discussionmentioning

confidence: 99%