MareFrame Deliverable 5.1 on “the description of a conceptual model of food web for each case study area“,, summarizes results on characterisation of ecosystem structures and identification of fisheries management issues. It is the first deliverable of WP5 “Apply new methods in case studies” and will apply the modelling approaches developed in WP4 on marine ecosystems. MareFrame Case studies (CSs) represent different types of European seas and the Chatham Rise east of New Zealand, characterized by different geological, oceanlogical and ecosystem structures (i.e. open marine waters or semi-enclosed seas) and cover a wide range of ecosystem types, biological complexity (e.g. Baltic/Mediterranean Sea/North Sea), ecological knowledge (e.g. data-poor/data rich areas) and a large array of management practices, issues and priorities.