In a reservoir in Southeast Brazil, introduction of a fish native to the Amazon has reduced native species diversity

The silver croaker (Plagioscion squamosissimus), a fish native to the Amazon (corvina or pescada-branca in Portuguese), is the most probable cause of a sharp fall in the diversity of native species in the Jaguari reservoir, the Jaguari River and Rio do Peixe, all of which are part of the Cantareira Water Production System and the Paraíba do Sul Basin in São Paulo state, Brazil.