The Dres is one of the alpine lakes in the Gran Paradiso National Park (GPNP) in which alien fish species have been introduced before it became part of the Park. An ambitious eradication program within the EU financed LIFE+ project BIOAQUAE (Biodiversity Improvement of Aquatic Alpine Ecosystems) is attempting to reestablish the natural equilibria of this and other three lakes in the GPNP. Tiberti, Acerbi and Iacobuzio report on the capture techniques used in this project (pages 64-71 of this issue). Photo: Paolo Gislimberti