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Predator-driven trait diversification in a dragonfly genus: covariation in behavioral and morphological antipredator defense
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
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2010 (English)In: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 64, no 11, 3327-3335 p.Article in journal (Refereed) Published
Abstract [en]

Proof for predation as an agent shaping evolutionary trait diversification is accumulating, however, our understanding how multiple antipredator traits covary due to phenotypic differentiation is still scarce. Species of the dragonfly genus Leucorrhinia underwent shifts from lakes with fish as top predators to fishless lakes with large dragonfly predators. This move to fishless lakes was accompanied by a partial loss and reduction of larval spines. Here, we show that Leucorrhinia also reduced burst swimming speed and its associated energy fuelling machinery, arginine kinase activity, when invading fishless lakes. This results in patterns of positive phylogenetic trait covariation between behavioral and morphological antipredator defense (trait cospecialization) and between behavioral antipredator defense and physiological machinery (trait codependence). Across species patterns of trait covariation between spine status, burst swimming speed and arginine kinase activity also matched findings within the phenotypically plastic L. dubia. Our results highlight the importance of predation as a factor affecting patterns of multiple trait covariation during phenotypic diversification.

Place, publisher, year, edition, pages
2010. Vol. 64, no 11, 3327-3335 p.
Keyword [en]
Arginine kinase;burst escape speed;divergent selection;phenotypic integration;predation;relaxed selection
National Category
Developmental Biology
URN: urn:nbn:se:umu:diva-40367DOI: 10.1111/j.1558-5646.2010.01078.xISI: 000283377500022PubMedID: 20624175OAI: diva2:399447
Available from: 2011-02-22 Created: 2011-02-22 Last updated: 2012-01-16Bibliographically approved

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