Fishes in MZNA-VERT: ecological assessment of the Aragon river in Sang?esa (Spain)

The Iberian fish fauna is affected by numerous human activities, and one of the most important is river pollution. Industry wastewater, such paper mills residues may affect the quality of rivers so the study of the fish populations is necessary to assess the possible ecologic impacts. This study analyses the fish populations of Aragon River in the city of Sang?esa (Navarra, Spain) to assess if its ecological quality is affected by its paper mill.