• Invertebrate Evolutionary Ecology, University of Zurich, Zurich, Switzerland
  • Adaptation, Behavior & Social Evolution, Evolutionary Ecology, Experimental Evolution, Life History, Phenotypic Plasticity, Sexual Selection, Speciation
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Diploma 1986, Tübingen University, Germany PhD 1990, State University of New York at Albany, NY, USA Post-doctoral fellowship 1991-93 Concordia University, Montréal, Canada since 1993 Oberassistant, later Professor University of Zurich, Switzerland

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Geographic body size variation in the periodical cicadas Magicicada: implications for life cycle divergence and local adaptation
Koyama T, Ito H, Kakishima S, Yoshimura J, Cooley JR, Simon C, Sota T

Recommended by Wolf Blanckenhorn and Thomas Flatt
Megacicadas show a temperature-mediated converse Bergmann cline in body size (larger in the warmer south) but no body size difference between 13- and 17-year species pairs

Periodical cicadas are a very prominent insect group in North America that are known for their large size, good looks, and loud sounds. However, they are probably known best to evolutionary ecologists because of their long juvenile periods of 13 or 17 years (prime numbers!), which they spend in the ground. Multiple related species living in the same area are often coordinated in emerging as adults during the same year, thereby presumably swamping any predators specialized on eating them.


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