International Institute of Fisheries Economics and Trade
Abstract
The present paper studied system viability of tilapia nilotica and Australian redclaw crayfish in
polyculture, considering tialpia as main species. Three scenarios were analyzed: tilapia monoculture with
38.7 fish/m3 and tilapia and Australian redclaw polyculture, considering the same stocking density for
fish in monoculture and 17.5 crustaceans/m2, of which one included a physical separation between
species. Modelling and simulation was conducted with the PowerSim software. The results showed the
polyculture without physical separation, generated sales revenue (3.261,30 dls) and net income
(479,98 dls), a harvesting time and size of 197 days and 350.7 g for tilapia. Modeling data proved useful
tools for decision-making allowing establish optimal harvest time for the monoculture and polyculture of
the studied species
