The first seminar of the project was carried out from 2 to 4 of April 2003 in the mountain refuge of Es Tossals Verds (Municipality of Esorca, Majorca). The seminar was attended by 13 researchers of the project. In addition, 2 researchers, who have developed similar projects in the Atlantic (IEO Santander) and in the Pacific (School of Fisheries University of Washington) and 3 investigators that develops their activity in other areas of the Mediterranean (IFREMER Séte, ARPAT-GEA Livorno and University of Alicante) also attended the seminar. All of them were interested in the subject of the project IDEA and in the preparation of a joint international project. The objectives of the seminary were: (i) to discuss to the preliminary results and planning of future activities of the project; (ii) to standardize sampling methodologies, treatment and analysis of the results obtained in the attainment of the different objectives, as well as its interpretation; (iii) to stimulate the creation of interdisciplinary working groups within the project and facing future international projects. During the seminary a total of 14 communications were exposed and discussed, of which 9 corresponded to members of the project IDEA.