7 resultados para Métodos de dosagem

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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Pós-graduação em Alimentos e Nutrição - FCFAR

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Three methods of sexual identification were evaluated in Nile tilapia (Oreochromis niloticus) at ages of 30, 60 and 90 days that were submitted to sexual reversion under administration of androgen hormone 17 alpha-methyltestosterone added to crumble diets with different granules sizes (0.25, 0.35 and 0.50 mm) in dosage of 60mg/kg. The techniques of sexual identification employed were: a) Macroscopic examination of urogenital papilla; b) Microscopic examination of gonads through stain with carmine-acetate and c) Microscopic examination of gonads through histological routine. In the presence of three methods of sexual identification evaluated, histology of gonads has shown the most confident diagnosis. The grain diameters of rations did not interfere in morphological characteristics of gonads, neither in secondary sexual characters of fish.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)