ORSI, Mário L.; AGOSTINHO, Angelo Antonio. Introdução de espécies de peixes por escapes acidentais de tanques de cultivo em rios da Bacia do Rio Paraná, Brasil. Revista Brasileira de Zoologia, Curitiba, v.16, n.2, p.557-560, 1999.Species composition and abundance of fishes that escaped from aquaculture facilities during catastrophic flooding in the Paranapanema and Tibagi rivers, in January, 1997 was estimated. In all, 1,292,000 adult individuals belonging to 11 species and 1 hybrid, were introduced into these rivers; only one species was native. The disasteris attributed to the illegal occupation of the river banks, and the non observance of standard measures designed to avoid escapement.