Ontogenic differences in sexual size dimorphism across four plover populations

Dos Remedios, Natalie, Székely, Tamás, Küpper, Clemens, Lee, Patricia L. M. and Kosztolányi, András 2015, Ontogenic differences in sexual size dimorphism across four plover populations, Ibis: International journal of avian science, vol. 157, no. 3, pp. 590-600, doi: 10.1111/ibi.12263.

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Title Ontogenic differences in sexual size dimorphism across four plover populations
Author(s) Dos Remedios, Natalie
Székely, Tamás
Küpper, Clemens
Lee, Patricia L. M.ORCID iD for Lee, Patricia L. M. orcid.org/0000-0002-8489-9206
Kosztolányi, András
Journal name Ibis: International journal of avian science
Volume number 157
Issue number 3
Start page 590
End page 600
Total pages 11
Publisher Wiley
Place of publication London, Eng.
Publication date 2015-07
ISSN 0019-1019
1474-919X
Keyword(s) Charadriiformes
Development
Growth
Ontogeny
Sexual size dimorphism
Tarsus
Waders
Summary Sexual size dimorphism (SSD) among adults is commonly observed in animals and is considered to be adaptive. However, the ontogenic emergence of SSD, i.e. the timing of divergence in body size between males and females, has only recently received attention. It is widely acknowledged that the ontogeny of SSD may differ between species, but it remains unclear how variable the ontogeny of SSD is within species. Kentish Plovers Charadrius alexandrinus and Snowy Plovers C. nivosus are closely related wader species that exhibit similar, moderate (c. 4%), male-biased adult SSD. To assess when SSD emerges we recorded tarsus length variation among 759 offspring in four populations of these species. Tarsus length of chicks was measured on the day of hatching and up to three times on recapture before fledging. In one population (Mexico, Snowy Plovers), males and females differed in size from the day of hatching, whereas growth rates differed between the sexes in two populations (Turkey and United Arab Emirates, both Kentish Plovers). In contrast, a fourth population (Cape Verde, Kentish Plovers) showed no significant SSD in juveniles. Our results suggest that adult SSD can emerge at different stages of development (prenatal, postnatal and post-juvenile) in different populations of the same species. We discuss the proximate mechanisms that may underlie these developmental differences.
Language eng
DOI 10.1111/ibi.12263
Field of Research 060208 Terrestrial Ecology
060302 Biogeography and Phylogeography
060411 Population, Ecological and Evolutionary Genetics
Socio Economic Objective 960802 Coastal and Estuarine Flora, Fauna and Biodiversity
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2015, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30073674

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