Differential timing and latitudinal variation in sex ratio of Aquatic Warblers during the autumn migration

Katarzyna Wojczulanis-Jakubas , Małgorzata E. Chrostek , Frédéric Jiguet , Carlos Zumalacárregui Martínez , David Miguélez , Júlio M. Neto

Abstract

Differential migration has been extensively reported in spring, but less so in autumn, particularly in relation to sex in monomorphic bird species. Here, we analysed the autumn passage of a monomorphic, globally threatened passerine, the Aquatic Warbler Acrocephalus paludicola throughout Western Europe, with regard to age and sex. We showed that, overall, adults migrated earlier than first-year birds, and males migrated earlier than females during the autumn migration. This may be caused by an overall social dominance of adults over immatures, and differentiated migration strategy of males and females. In addition, we found male-skewed sex proportions, with a tendency to an equalised ratio in more southern stopover sites. This may indicate a male bias in the global population or different migration strategies of the sexes. Differential migration may cause the age and sex classes to be exposed differently to various threats affecting demographic structure of the species.
Author Katarzyna Wojczulanis-Jakubas KEiZK
Katarzyna Wojczulanis-Jakubas,,
- Department of Vertebrate Ecology and Zoology
, Małgorzata E. Chrostek WB
Małgorzata E. Chrostek,,
- Faculty of Biology
, Frédéric Jiguet
Frédéric Jiguet,,
-
, Carlos Zumalacárregui Martínez
Carlos Zumalacárregui Martínez,,
-
, David Miguélez
David Miguélez,,
-
, Júlio M. Neto
Júlio M. Neto,,
-
Journal seriesScience of Nature, ISSN 0028-1042, e-ISSN 1432-1904
Issue year2017
Vol104
No11-12
Pages1-5
Publication size in sheets0.5
Keywords in EnglishAcrocephalus paludicola, migration strategy, sex proportion
DOIDOI:10.1007/s00114-017-1525-x
URL https://doi.org/10.1007/s00114-017-1525-x
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)35
ScoreMinisterial score = 30.0, 26-02-2018, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 26-02-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.191 (2) - 2016=1.191 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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