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

Wojczulanis-Jakubas, Katarzyna; Chrostek, Małgorzata E.; Jiguet, Frédéric; Martínez, Carlos Zumalacárregui; Miguélez, David and Neto, Júlio M. LU (2017) In Die Naturwissenschaften 104(11-12). p.101-101
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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acrocephalus paludicola, Migration strategy, Sex proportion
in
Die Naturwissenschaften
volume
104
issue
11-12
pages
1 pages
publisher
Springer
external identifiers
  • scopus:85038250142
  • wos:000415294200003
ISSN
1432-1904
DOI
10.1007/s00114-017-1525-x
language
English
LU publication?
yes
id
fd6ec294-eed4-4422-b4f2-e59fb327f4aa
date added to LUP
2018-01-04 10:16:25
date last changed
2018-01-16 13:29:09
@article{fd6ec294-eed4-4422-b4f2-e59fb327f4aa,
  abstract     = {<p>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.</p>},
  author       = {Wojczulanis-Jakubas, Katarzyna and Chrostek, Małgorzata E. and Jiguet, Frédéric and Martínez, Carlos Zumalacárregui and Miguélez, David and Neto, Júlio M.},
  issn         = {1432-1904},
  keyword      = {Acrocephalus paludicola,Migration strategy,Sex proportion},
  language     = {eng},
  month        = {11},
  number       = {11-12},
  pages        = {101--101},
  publisher    = {Springer},
  series       = {Die Naturwissenschaften},
  title        = {Differential timing and latitudinal variation in sex ratio of Aquatic Warblers during the autumn migration},
  url          = {http://dx.doi.org/10.1007/s00114-017-1525-x},
  volume       = {104},
  year         = {2017},
}