Katie Cresswell is a postdoctorate researcher at IMAS and CSIRO, modelling the stock and bioeconomic dynamics for Longspined sea urchin in Tasmania. She completed a PhD at the British Antarctic Survey in Cambridge UK modelling the behavioural interactions between penguins and krill in the Southern Ocean. Following the PhD, she undertook a postdoctorate at the University of California, Santa Cruz with Professor Marc Mangel in the Department of Applied Mathematics, where she created behavioural optimisation models to predict the effects of climate change and krill fishing on penguins, and used game theory to examine issues of parental conflict, chick growth and prey field variation.