My research focuses on the marine pelagic environment, with an especial interest in the understanding of the ecological role of pelagic fishes in the ecosystem. I work at different levels of ecological complexity (from individuals to communities). Methodologically, I study the trophic ecology of small pelagic fish combining the use of stable isotope and stomach content analysis. Also, I combine the trophic information with ecophysiological parameters such lipid and energy content. At species level, I use Dynamic Energy Budget models using oceanographic data to simulate different scenarios of environmental conditions under climate change and at ecosystem level, I use Qualitative mathematical complex models focusing in the role of fisheries and other predators in the dynamics of small pelagic fish. I am also interested in co-management of fisheries and how marine ecological knowledge can be used in socio-ecological research.