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Allometry of secondary, primary and non-sexual traits in the beautiful demoiselle (Calopteryx virgo)
Biología de Organismos y Sistemas, University of Oviedo.
Univ Vigo, Dept Ecol & Biol Anim, E-36005 Pontevedra, Spain.
2012 (English)In: Canadian Journal of Zoology, ISSN 0008-4301, E-ISSN 1480-3283, Vol. 90, 1094-1101 p.Article in journal (Refereed) Published
Abstract [en]

The static allometry between the size of a trait and the body size results from the net selection forces acting on the evolution of both the trait and the body size. An increased knowledge of the functional significance of traits is necessary to understand observed allometric patterns. We studied several traits of males of the beautiful demoiselle (Calopteryx virgo meridionalis Selys, 1873), for which there is a good functional knowledge of the genitalic traits and ornaments. We found positive allometry for the wing spot size (considered a secondary sexual trait) and for the distal width (but not length) of the anal appendages, which are used for grasping the female prior to copulation. Regarding the male secondary genitalia, the length but not the width of the big horns of the aedeagus showed an isometric pattern. The aedeagus shaft length showed a negative allometric pattern, while its distal width did not show a significant regression. The slopes of the regressions were higher when using wing length than when using body length as estimators of body size, with the exception of wing spot length. Results are discussed based on the functional significance of the study traits, as well as the pre- and post-copulatory selective pressures acting on them.

Place, publisher, year, edition, pages
2012. Vol. 90, 1094-1101 p.
Keyword [en]
aedeagus, body size, beautiful demoiselle, Calopteryx virgo meridionalis, genitalia, superior anal appendages, wing spot
National Category
Zoology
Identifiers
URN: urn:nbn:se:uu:diva-263495DOI: 10.1139/Z2012-076ISI: 000308772300004OAI: oai:DiVA.org:uu-263495DiVA: diva2:858203
Available from: 2015-10-01 Created: 2015-10-01 Last updated: 2017-12-01Bibliographically approved

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Outomuro, David

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