The aim of this study was to analyse the reproductive period, fecundity and the size of the first gonadal maturation of Cyphocharax voga (Hensel, 1869) of Custódias Lagoon, state of Rio Grande do Sul, Brazil. The specimens (293 males and 247 females) were collected monthly, during the period between October 1994 and September 1995. The reproductive period took place from early winter until the end of spring. The average absolute fecundity was 36608 oocytes. The size of the first gonadal maturation was estimated in 121 and 128 mm for males and females respectively.
Curimatidae; Cyphocharax voga; fecundity; reproduction