Machado, M.H. Pavanelli, G.C. Takemoto, R.M. Influence of host's sex and size on endoparasitic infrapopulations of Pseudoplatystoma Corruscans and Schizodon Borelli (Osteichthyes)of the high Parana River, Brazil Subjects--Topical Terms: SurubimHospedeiroSexoInfeccaoPARANÁ