Invited Seminar at CES on 27 March 2018 at 3:00 pm titled "The evolution of wings in dragonflies: predation, sexual selection and migration. " by Frank Johansson from Uppsala University

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Topic: 
The evolution of wings in dragonflies: predation, sexual selection and migration.
Speaker: 
Frank Johansson, Uppsala University
Date & Time: 
27 Mar 2018 - 3:00pm
Event Type: 
Invited Seminar
Venue: 
CES Seminar Hall, 3rd Floor, Biological Sciences Building
Coffee/Tea: 
Before the talk
Abstract:

Wings in insects come in many forms. I will show how coloration and wings in insect wings are shaped by different and conflicting selection pressures. I will do this by presenting results and conclusions from several studies. 1) By estimating damselfly wing reflectance, and use receptor noise models we have explored the visual discriminability of wing coloration in a three level system: bird, damselfly and fly. Results show that males are more discriminable. 2) I will also show how bird predation selects for wing shape and wing coloration in a damselfly system. 3) By using a phylogenetic approach we have shown that wing shape and wing coloration are associated. Our results show interesting differences in wing shape among species that probably are shaped by sexual selection. 4) Finally, I will present results from a study exploring how range size and migration affects wing shape in North American dragonflies.

Speaker Bio: 
Frank Johansson, Department of Ecology and Genetics, Uppsala University Sweden. My research focus on the evolution of phenotypic plasticity and local adaptation of populations and species in response to environmental changes. I use dragonflies, frogs and fish as my model organisms, and I focus on life history traits and neutral genetic markers. I am running several project and here are some: Cryptic genetic variation and adaptation in novel environments; Evolutionary ecology of colour communication in sexual selection and predator-prey interactions; Potential responses to climate change: from genotype to community level