... This was evaluated by reviewing targeted literature of inland waters from Perú and Chile and traditional knowledge of commercial fisher organizations of Chilean prawn about: C. caementarius (Bahamonde & Vila, 1971), leeches (Tello, Jerez, & Olmos, 2007;Christoffersen, 2009), fish (Arratia, 1981;Dyer, 2000;Ortega, Guerra, & Ramírez, 2007;Cossíos, 2010;Avilés, López, & Flores, 2018), frogs (Charrier, 2019), waterfowls (Schulenberg, Stotz, Lane, O´Neill, & Parker, 2010;Medrano, Barros, Norambuena, Matus, & Schmitt, 2018) and mammals (Bastida, Rodríguez, Secchi, & da Silva, 2007). For each species was determined family, zoogeographic origin (native, exotic, cosmopolitan), trophic functional group (carnivore, omnivore, herbivore), phenotypic attributes (opportunist and selective), distribution zone (estuary, potamon, rhithron) and the ontogenic stage of C. caementarius preferred as prey (trophic amplitude). ...