Effects of weir construction on fish population structure in the River Erro (North of Spain)R. Miranda, J. Oscoz, P. M. Leunda, C. García-Fresca and M. C. EscalaAnn. Limnol. - Int. J. Lim., 41 1 (2005) 7-13DOI: https://doi.org/10.1051/limn/2005007