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• W1882497785 abstract "EnglishThe main objective of this work was to determine the effect of the use of hypophyseal raw extract to induce fish spawning in curimbata specie. An election of females of frog bull (Rana castesbeiana) was carried through for extraction of hyphophysys, where the female donors had been those that presented an increment of their visceral socket, which was provoked by ovaries in mature phase or advanced maturation. Twenty curimbata breeders (Prochilodus affinis) had been used for spawning. The males had an initial average weight of 170.0 g and an average length of 21.72 cm and the females with an initial weight average of 181.0 g and an average length of 6.28 cm. The experiment was carried through with 2 treatments: Treatment 1: 0.5 mg/kg and Treatment 2: 0.7mg/kg. The animals were stocked in aquarium with 1000 L capacity with constant aeration. The females received two intramuscular injections of frog bull raw extract, being the first dose of 0.5 mg/kg and the second 0.7 dose of mg/kg, with interval of 12 hours. The females with dosages of 0.5 mg/kg had obtained a superior number of larvae than those with 0,7 mg/kg. The difference was statistical significant (P>0,06). This result was probably due to different stadiums of gonadal maturation. Both dosages (0.5 and 0.7 mg/kg) of frog bull hypophyseal raw extract had allowed to induce reproduction of curimbata females, showing an alternative in the reproductive handling. portuguesLa objetivou-se com este trabalho determinar o efeito do uso do extracto bruto de hipofisis (EBH) na inducao da desova em curimbata. Foi realizado uma selecao de femeas de ra touro (Rana castesbeiana) para extracao da hipofise, onde as femeas doadoras foram aquelas que apresentavam aumento da cavidade visceral, provocado pelo ovarios em estadio maduro ou de maturacao avancada. Para desova foram utilizados 20 reprodutores de curimbata (Prochilodus affinis). Os machos com peso medio inicial de 170,0 g e comprimento medio de 21,72 cm e as femeas com peso medios iniciais de 181,0 g e comprimento medio de 6,28 cm. O experimento foi realizado com dois tratamentos: Tratamento 1: 0,5 mg/kg e Tratamento 2: 0,7 mg/kg. Os animais foram alojados em aquario com 1000 L de agua, aeracao constante. Vinte femeas receberam duas injecoes intramusculares de extrato bruto de ra touro, sendo a primeira dose de 0,5 mg/kg e a segunda dose de 0,7 mg/kg, com intervalo de 12 horas. Os curimbatas submetidos a dosagens de 0,5 mg/kg obtiveram numeros de larvas superior e estatisticamente significativas (P>0,06) ao tratamento 2 utilizando 0,7 mg /kg, provavelmente esse resultado pode ser em funcao de umas femeas estarem em diferentes estadios de maturacao gonadal. Em curimbata duas de doses de extrato bruto de hipofise de ra touro nas concentracoes de 5 e 7 mg/kg, permitiram a inducao reprodutiva das femeas, mostrando uma alternativa no manejo reprodutivo" @default.
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• W1882497785 date "2007-06-01" @default.
• W1882497785 modified "2023-09-28" @default.
• W1882497785 title "Reproducao induzida de curimbata (Prochilodus affinis) com uso de extrato bruto hipofisario de ra touro (Rana catesbeiana)" @default.
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