Title
Evolutionary maintenance of sexual dimorphism in head size in the lizard **Zootoca vivipara** : a test of two hypotheses Evolutionary maintenance of sexual dimorphism in head size in the lizard **Zootoca vivipara** : a test of two hypotheses
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
London ,
Subject
Biology
Source (journal)
Journal of zoology. - London
Volume/pages
259(2003) :Part 1 , p. 7-13
ISSN
0952-8369
ISI
000182606700002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Zootoca vivipara is a small lizard that shows sexual dimorphism in head size. Males have larger heads than females of the same body size. By observing matings and aggressive interactions between males in the laboratory, we investigated whether this sexual dimorphism could be the result of intra- and/or intersexual selection. Winners of male-male interactions had larger heads than losers. During mating attempts, males with larger heads succeeded in grasping a female faster than males with smaller heads. It follows that head size in Z vivipara may affect male reproductive success both through intrasexual competition (fighting ability) and through intersexual selection (grasping ability). This suggests that sexual selection may be the cause for the sexual dimorphism in head size in this species.
E-info
https://repository.uantwerpen.be/docman/iruaauth/95774e/149be27b195.pdf
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