Profiles

Karl Gotthard

Carl Gotthard

Forskare

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Arbetar vid Zoologiska institutionen
Telefon 08-16 40 48
E-post karl.gotthard@zoologi.su.se
Besöksadress Svante Arrheniusväg 18 B
Rum D 545
Postadress Zoologiska institutionen: Ekologi 106 91 Stockholm

Om mig

In my group we are exploring the evolutionary ecology of developmental plasticity and life history in insects, primarily butterflies. We are particularly interested in how the diapause decision affects life cycle regulation and to what degree it allows the evolution of partly independent developmental pathways. We are studying this in several different butterfly species using a wide range of methods from field experiment to genomics.

Forskning

My research concerns the evolutionary ecology of developmental plasticity and life history in insects, primarily butterflies. I am particularly interested in how the diapause decision affects life cycle regulation and how it evolves due to variation in local selction pressures. I also investigate how insect diapause affects spring phenology and interactions between butterflies and their host plants and to what degree the diapause decision allows the evolution of partly independent developmental pathways. We are studying this in several different butterfly species using a wide range of methods from field experiment to genomics.

Presently I am hosting one post-doc , Dr. Philipp Lehmann, and I am supervising two Ph.D students, Peter Pruisscher and Olle Lindestad.

A updated list of my publications can be found here.

 

Publikationer

I urval från Stockholms universitets publikationsdatabas
  • Tenna Toftegaard (et al.).
  • Inger M. Aalberg Haugen, Karl Gotthard.

    1. Seasonal phenotypic plasticity entails differential trait expression depending on the time of season. The facultative induction of winter diapause in temperate insects is a developmental switch mechanism often leading to differential expression in life history traits. However, when there is a latitudinal shift from a bivoltine to univoltine life cycle, selection for pathway-specific expression is disrupted, which may allow drift towards less optimal trait values within the non-selected pathway.

    2. We use field- and experimental data from five Swedish populations of Pararge aegeria to investigate latitudinal variation in voltinism, local adaptation in the diapause switch, and footprints of selection on pathway-specific regulation of life history traits and sexual dimorphism in larval development.

    3. Field data clearly illustrated how natural populations gradually shift from bivoltinism to univoltinism as latitude increases. This was supported experimentally as the decrease in direct development at higher latitudes was accompanied by increasing critical daylengths, suggesting local adaptation in the diapause switch.

    4. The differential expression among developmental pathways in development time and growth rate was significantly less pronounced in univoltine populations. Univoltine populations showed no significant signs of protandry during larval development, suggesting that erosion of the direct development pathway under relaxed selection has led to the loss of its sex-specific modifications.

  • Tenna Toftegaard (et al.).
Visa alla publikationer av Carl Gotthard vid Stockholms universitet

Senast uppdaterad: 21 september 2017

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