Paulo de Tarso da Cunha Chaves 2 Ana Lúcia Vendei 3 ABSTRACT. REPRODUCTlON OF STELLlFER RASTRlFER (JORDAN) (TELEOSTEI, SClAE-NlDAE) AT mE GUARATUBA BAY, PARANÁ, BRAZIL. A total of 1312 individuaIs of S. rastrifer were sampled ITom March 1994 to September 1996 at the Guaratuba Bay, Southem Brazilian coast. This species is a permanently inhabitant of the mangrove area throughout the year. The weightJlength relationship of the species in the region is "In TW =-12.35 + 3,22 In TL", and the individuaIs may reach 172mm oftotallength. The analyses of gonadal morphology and gonadossomatic index indicate that S. rastrifer is a multiple spawner species, that reproduces at the mangrove area during a long period of the year. The reproductive activity is more intense during the winter and mainly the spring, when the value ofCondition Factor declines and empty foHicles are found in the ovaries. KEY WOROS. Teleostei, Sciaenidae, Stellifer rastrifer, fish reproduction, Guaratuba Bay, Brazil 1) Contribuição número 964 do Departamento de Zoologia, Universidade Federal do Paraná. Realizado parcialmente com verbas com verbas do CNPq e FUNPAR.