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Sex and age-specific differences in wing pointedness and wing length in blackcaps Sylvia atricapilla migrating through the southern Baltic coast

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Current Zoology 2021年第3期67卷 271-277页

作者： Agnieszka Ozarowska Grzegorz Zaniewicz Wtodzimierz Meissner Department of Vertebrate Ecology and Zoology Avian Ecophysiology UnitUniversity of GdanskGdansk80-308Poland Bird Migration Research Station University of GdanskGdansk80-308Poland

The blackcap Sylvia atricapilla shows a complex migratory pattern and is a suitable species for the studies of morphological migratory syndrome,including adaptations of wing shape to different migratory *** migrants of this species that breed in northern,central,and Eastern Europe differ by migration distance and some cover shorter distance to the wintering grounds in the southern part of Europe/North Africa or the British Isles,although others migrate to sub-Saharan *** on>40years of ringing data on blackcaps captured during autumn migration in the Southern Baltic region,we studied age-and sex-related correlations in wing pointedness and wing length of obligate blackcap migrants to understand the differences in migratory behavior of this *** though the recoveries of blackcaps were scarce,we reported some evidence that individuals which differ in migration distance differed also in wing *** found that wing pointedness significantly increased with an increasing wing length of migrating birds,and adults had longer and more pointed wings than juvenile *** indicates stronger antipredator adaptation in juvenile blackcaps than selection on flight efficiency,which is particularly important during ***,we documented more pronounced differences in wing length between adult and juvenile males and *** differences in wing length may enhance a faster speed of adult male blackcaps along the spring migration route and may be adaptive when taking into account climatic effects,which favor earlier arrival from migration to the breeding grounds.

关键词： blackcap migration population wing shape

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Fuel load and flight ranges of blackcaps Sylvia atricapilla in northern Iberia during autumn and spring migrations

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Current Zoology 2009年第6期55卷 401-410页

作者： Juan ARIZAGA Emilio BARBA Department of Zoology and Ecology University of Navarra "Cavanilles" Institute of Biodiversity and Evolutionary Biology University of Valencia

Fuel accumulation, mainly as fatty acids, is one of the main characteristics of migratory, birds. Studying to what extent each population or species manages fuel load and how it varies along routes of migration or between seasons （autumn and spring migrations） is crucial to our understanding of bird migration strategies. Our aim here was to analyse whether migratory blackcaps Sylvia atrieapilla passing through northern Iberia differ in their mean fuel loads, rate of fuel accumulation and ＇ potential＇ flight ranges between migration seasons. blackcaps were mist netted for 4 h-periods beginning at dawn from 16 September to 15 November 2003 - 2005, and from 1 March to 30 April 2004 - 2006 in a European Atlantic hedgerow at Loza, northern Iberia. Both fuel load and fuel deposition rate （this latter assessed with difference in body mass of within-season recaptured individuals） were higher in autumn than in spring. Possible hypotheses explaining these results could be seasonal-associated variations in food availability （likely lower during spring than during autumn）, the fact that a fraction of the migrants captured in spring could breed close to the study area and different selective pressures for breeding and wintering

关键词： blackcap Srlvia atricapilla Fuel load lberia Migration Stopover

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Adaptive evolution of migratory behavior

Adaptive evolution of migratory behavior

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23rd International Ornithological Congress

作者： Francisco Pulido Max Planck Research Center for Ornithology Vogelwarte D-78315 Radolfzell Germany

The conditions under which different migration patterns evolved have constantly been changing. Therefore, migratory behavior has always been subject to evolutionary change. At present, this is becoming particularly apparent as rapid climatic wanning is causing major shifts in avian migration patterns. Here, I shall review recent work on genetic variation, changes and constraints on the evolution of migratory behavior, and discuss their implications for adaptive evolution of avian migration.

关键词： blackcap natural selection quantitative genetics reaction norm genetic constraint

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