Dinamica da nutricao da "pescada do Piaui", Plagioscion squamosissimus (Heckel, 1840) (Osteichthyes, Sciaenidae), na represa de Ibitinga (21 grados 46'S-48 grados 59'W), Rio Tiete, Estado de Sao Paulo, Brasil

The stomach average repletion index, the condition factor and the stage of repletion relative frequency as seasonal functions are analyzed. It was verified the seasons when the "Pescada do PiauA­", Plagioscion squamosissimus (Heckel, 1840), from Ibitinga Reservoir (21°46'S - 48°59'W), TietAa River, SA£o Paulo State, Brazil, are found to be fatter and the seasonal repletion index variations.