Welcome to my official University of Amsterdam webpage. Apart from studying at the University of Amsterdam from 1979 until 1985, I have been working at this University since 1991. I'm currently professor in Theoretical Ecology at the Institute for Biodiversity and Ecosystem Dynamics of the Faculty of Science. In my research I focus on the dynamics of animal (mainly fish) populations, how these dynamics emerge from individual life histories and how they are influenced by environmental factors like productivity or human influences like harvesting. For more detailed information about my research and my teaching, please visit my webpage at the Faculty of Science.