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Angling competitions are a popular leisure activity in reservoirs ofSouthern Portugal. These competitions can gather more than 100 anglersaiming to catch the maximum fish weight. Groundbaiting and catch-andreleaseangling are two common practices for anglers in competition. Inthis study, the loads of nutrients from commercial groundbait powdersused in angling competitions in the Maranhão reservoir and the possiblebalance out of those nutrients through a moderate biomanipulation of thefish biomass caught in competitions were analysed. In order to achievethis aim, chemical analyses to groundbait powders most purchased byPortuguese anglers and to fish species most captured in competitionswere made. Mass balances on inputs and outputs of nutrients consideringsome biomanipulation scenarios were evaluated. Results demonstratedthat an effective management on angling competitions implementing amoderate biomanipulation of fish in reservoirs could promote the controlof fish fauna and eutrophication, balancing out nutrients from anglinginfo:eu-repo/semantics/publishedVersio

Moderate biomanipulation for eutrophication control in reservoirs using fish captured in angling competitions