HISTORICAL TROUT DISTRIBUTION IN SPAIN

Presence (=1) or absence (=0) of brown trout (Salmo trutta) in 5427 localities in Spain during the mid-19th century, as informed by the geographical dictionary edited by Pascual Madoz [Madoz P. 1845-1850 Diccionario Geográfico, Estadístico y Histórico de España, y sus Posesiones de Ultramar. 16 vols. Madrid, Spain]. Absence localities are those in which the dictionary identified freshwater fish species but did not mention the trout. Latitude and longitude are given in decimal degrees