Freshwater fish and their conservation in Portugal Original Research Article

There are 36 species and subspecies of freshwater fish and three migratory species in Portugal. Eleven have been introduced, 13 are endemic to the Iberian Peninsula and two live exclusively in Portugal (Chondrostoma lusitanicum and Rutilus macrolepidotus). Industrica pollution and the introduction of exotic fish species are the most serious conservation problems for Portuguese endemic fish.