The Squalius carolitertii density estimates in the
Estor˜aos River are similar to the ones estimated
from 1983 to 1986 for the same river (Valente,
1993), but higher than those estimated by Maia
& Valente (1999) for other tributaries of the Lima
basin, with the only exception being the Froufe
River (mean density of 12.92 ind/100 m2)