The life strategies of the Iberian ichthyofauna, poor in species and with a high number of endemisms, are the result of the functioning of the aquatic systems (streams and reservoirs). The majorety of the species wager for iteroparity, high fertility, predominance of males over females and omnivorous feeding habits (short- chain trophic relationships). The fish assemblage is not very structured and depends on the autoecology of the species
