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Sex-specific arrival times on the breeding grounds: hybridizing migratory skuas provide empirical support for the role of sex ratios

Lisovski, Simeon, Fröhlich, Anne, von Tersch, Matthew, Klaassen, Marcel, Peter, Hans-Ulrich and Ritz, Markus S. 2016, Sex-specific arrival times on the breeding grounds: hybridizing migratory skuas provide empirical support for the role of sex ratios, The American naturalist, vol. 187, no. 4, pp. 532-539, doi: 10.1086/685282.

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Title Sex-specific arrival times on the breeding grounds: hybridizing migratory skuas provide empirical support for the role of sex ratios
Author(s) Lisovski, Simeon
Fröhlich, Anne
von Tersch, Matthew
Klaassen, Marcel
Peter, Hans-Ulrich
Ritz, Markus S.
Journal name The American naturalist
Volume number 187
Issue number 4
Start page 532
End page 539
Total pages 8
Publisher University of Chicago Press
Place of publication Chicago, Ill.
Publication date 2016-04
ISSN 1537-5323
1537-5323
Keyword(s) Catharacta
arrival dates
migration
population sex ratio
sex role reversal
spring migration
Science & Technology
Life Sciences & Biomedicine
Ecology
Evolutionary Biology
Environmental Sciences & Ecology
SOUTH POLAR SKUAS
CATHARACTA-MACCORMICKI
ANTARCTICA-LONNBERGI
BROWN SKUAS
SELECTION
POPULATION
BEHAVIOR
BIRDS
PATTERNS
AREAS
Summary In migratory animals, protandry (earlier arrival of males on the breeding grounds) prevails over protogyny (females preceding males). In theory, sex differences in timing of arrival should be driven by the operational sex ratio, shifting toward protogyny in female-biased populations. However, empirical support for this hypothesis is, to date, lacking. To test this hypothesis, we analyzed arrival data from three populations of the long-distance migratory south polar skua (Catharacta maccormicki). These populations differed in their operational sex ratio caused by the unidirectional hybridization of male south polar skuas with female brown skuas (Catharacta antarctica lonnbergi). We found that arrival times were protandrous in allopatry, shifting toward protogyny in female-biased populations when breeding in sympatry. This unique observation is consistent with theoretical predictions that sex-specific arrival times should be influenced by sex ratio and that protogyny should be observed in populations with female-biased operational sex ratio.
Language eng
DOI 10.1086/685282
Field of Research 060299 Ecology not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The University of Chicago
Free to Read? No
Free to Read Start Date 2017-05-01
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083306

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