Correlated morphological and colour differences among females of the damselfly Ischnura elegans

Abbott, Jessica K. and Gosden, Thomas P. (2009) Correlated morphological and colour differences among females of the damselfly Ischnura elegans. Ecological Entomology, 34 3: 378-386. doi:10.1111/j.1365-2311.2009.01087.x


Author Abbott, Jessica K.
Gosden, Thomas P.
Title Correlated morphological and colour differences among females of the damselfly Ischnura elegans
Journal name Ecological Entomology   Check publisher's open access policy
ISSN 0307-6946
1365-2311
Publication date 2009-06-01
Sub-type Article (original research)
DOI 10.1111/j.1365-2311.2009.01087.x
Volume 34
Issue 3
Start page 378
End page 386
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell
Language eng
Abstract 1. The female-limited colour polymorphic damselfly Ischnura elegans has proven to be an interesting study organism both as an example of female sexual polymorphism, and in the context of the evolution of colour polymorphism, as a model of speciation processes. 2. Previous research suggests the existence of correlations between colour morph and other phenotypic traits, and the different female morphs in I. elegans may be pursuing alternative phenotypically integrated strategies. However, previous research on morphological differences in southern Swedish individuals of this species was only carried out on laboratory-raised offspring from a single population, leaving open the question of how widespread such differences are. 3. The present study therefore analysed multi-generational data from 12 populations, investigating morphological differences between the female morphs in the field, differences in the pattern of phenotypic integration between morphs, and quantified selection on morphological traits. 4. It was found that consistent morphological differences indeed existed between the morphs across populations, confirming that the previously observed differences were not simply a laboratory artefact. It was also found, somewhat surprisingly, that despite the existence of sexual dimorphism in body size and shape, patterns of phenotypic integration differed most between the morphs and not between the sexes. Finally, linear selection gradients showed that female morphology affected fecundity differently between the morphs. 5. We discuss the relevance of these results to the male mimicry hypothesis and to the existence of potential ecological differences between the morphs.
Keyword Phenotypic integration
polymorphism
selection
sexual dimorphism
shape
size
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Wed, 09 Mar 2011, 23:15:51 EST