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2002 The Society for the Study of Evolution. All rights reserved. Evolution, 56(5), 2002, pp. 936947
 

Summary: 936
2002 The Society for the Study of Evolution. All rights reserved.
Evolution, 56(5), 2002, pp. 936­947
CORRELATED EVOLUTION OF MALE AND FEMALE MORPHOLOGIES IN
WATER STRIDERS
GO¨ RAN ARNQVIST,1,2 AND LOCKE ROWE3,4
1Department of Animal Ecology, Evolutionary Biology Centre, University of Uppsala,
Norbyva¨gen 18d, SE-752 36 Uppsala, Sweden
2E-mail: goran.arnqvist@ebc.uu.se
3Department of Zoology, University of Toronto, Toronto, Ontario M5S 1A1, Canada
4E-mail: lrowe@zoo.utoronto.ca
Abstract. Sexually antagonistic coevolution may be an important force in the evolution of sexual dimorphism. We
undertake a comparative study of correlated evolution of male and female morphologies in a clade of 15 water strider
species in the genus Gerris (Heteroptera: Gerridae). Earlier studies have shown that superfluous matings impose costs
on females, including increased energetic expenditure and predation risk, and females therefore resist males with
premating struggles. Males of some species possess grasping structures and females of some species exhibit distinct
antigrasping structures, which are used to further the interests of each sex during these premating struggles. We use
this understanding, combined with coevolutionary theory, to derive a series of a priori predictions concerning both
the types of traits in the two sexes that are expected to coevolve and the coevolutionary dynamics of these traits
expected under sexually antagonistic coevolution. We then assess the actual pattern of correlated evolution in this

  

Source: Arnqvist, Göran - Department of Animal Ecology, Uppsala Universitet

 

Collections: Environmental Sciences and Ecology