Date: 2014-10-15 02:00 PM
Speaker: ??? Extended/EventDirector/Description ???
Local: IPMA Algés Lisbon
Email contact: ??? Extended/EventDirector/Email ???
Phone contact: 213027000
Fishing at sustainable levels is changing from single species based management towards mixed fisheries within an ecosystem approach. Mixed fisheries are usually characterized by complex interactions between fleets, fish species and the environment. These fisheries have a relevant contribution for the Portuguese fishing activity's revenue. However, as many other mixed fisheries, they present a combination of high uncertainty (e.g. several species without assessment), complex science (combining biological and technical interactions) and political choices (e.g. trade-offs between catch options). In this work we used regression trees to identify different fisheries based on catch composition and gears, as reported in logbooks. The relation between species vulnerability and their functional role at the ecosystem scale is explored by fishery. Hence, technical interactions among fishing gears, and species biological interactions are analyzed within and among fisheries. This approach allows us to identify key elements that can, ultimately, be incorporated on management plans for mixed fisheries.