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Rhamdia quelen e Pseudopimelodus charus são dois bagres que atingem porte acima de 2 kg. Espécimes receberam dose única de extrato bruto de hipófise de carpa comum EBHC (2,5 mg kg-1 de peixe nos machos e 6 mg kg-1 de peixe nas fêmeas). A extrusão de ovócitos ocorreu cerca de 12,2 e 12,3 horas após a aplicação de EBHC, respectivamente para R. quelen e P. charus (temperatura da água a 26oC). Mais de 75% das fêmeas das duas espécies responderam positivamente ao tratamento com taxas médias de fertilização dos ovócitos acima de 75%. Ovócitos de P. charus e R. quelen são esféricos, opacos, demersais, livres e recobertos por capa gelatinosa, contendo em média 1073 e 1128 ovócitos por grama, respectivamente. Larvas das duas espécies eclodiram cerca de 21 horas após a fertilização dos ovócitos, com temperatura da água a 24ºC. Rhamdia quelen and Pseudopimelodus charus are two catfish species that can reach more than 2 kg. The specimens received one dose of crude carp pituitary extract (CCPE) (2.5 mg kg-1 for males and 6 mg kg-1 for females). Oocyte extrusion was done after 12.2 and 12.3 hours after the CCPE injection in R. quelen and P. charus respectively, at water temperature of 26ºC. More than 75% of the females of both species presented a positive response to the treatment, with mean rates of oocytes fertilization above 75%. The oocytes of P. charus and R. quelen are spherical, opaque, demersal, non adherent and covered by a jelly coat. There were found a mean number of 1073 and 1128 oocytes per gram respectively and the larvae of the two species ecloded around 21h after oocyte fertilization at 24ºC

Biologia reprodutiva e desova induzida de duas espécies de bagres (Osteichthyes: Siluriformes) da bacia do rio São Francisco