ICTP's Workshop on Theoretical Ecology: Natural Resource Management and Conservation Biology, co-directed by G.A. Canziani, Universidad Nacional del Centro de la Provincia de Buenos Aires, Argentina, G.A. De Leo, Università di Parma, Italy, and A. Dobson, Princeton University, USA, will take place from 22 April to 3 May. The workshop, an outgrowth of the Centre's mathematical ecology courses and workshops that have been held over the past 18 years, will focus on natural resource management and conservation biology. Participants will include mathematicians, ecologists, biologists, economists and agricultural scientists.