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Efeito da suplementação de fitase na alimentação de juvenis de tambaqui (Colossoma macropomum)

Authors: Mendonça, P.P.; Costa, P.C.; Polese, M.F.; Vidal Jr, M.V.; Andrade, D.R.;

Efeito da suplementação de fitase na alimentação de juvenis de tambaqui (Colossoma macropomum)

Abstract

O presente experimento foi realizado na Universidade Estadual do Norte Fluminense Darcy Ribeiro, no setor de aqüicultura, objetivando-se avaliar a suplementação de fitase para alevinos de tambaqui (Colossoma macropomum). Foram utilizados 170 alevinos com peso inicial médio de, 3,12±0,05 g e comprimento total médio inicial de 5,36±0,06 cm. Os alevinos foram distribuídos aleatoriamente, em 20 aquários experimentais de volume útil 40 L, com abastecimento de água proveniente de um sistema de circulação fechado, equipado com filtro biológico. Os tratamentos foram constituídos de cinco dietas isoprotéicas e isocalóricas (28% de proteína e 3100 kcal de ED/kg de dieta), suplementadas com quatro níveis de fitase exógena (700, 1400, 2100 e 2800 UAF/kg de dieta) mais uma sem suplementação. A adição de fitase as dietas, foi realizada durante a mistura dos ingredientes para fabricação das dietas peletizadas. Foi verificado o efeito da suplemen-tação de fitase sobre as variáveis mensuradas, sendo a menor dose estimada igual a 1540,62UFA kg-1 de dieta, para variável consumo de ração e a maior dose estimada igual a 2303,83 UFA kg-1 de dieta, para variável taxa de desenvolvimento especifica. As doses estimadas no presente trabalho são superiores às encontradas em trabalhos que citam o efeito da suplementação sobre os peixes. Entretanto a dose de suplementação, assim como a idade e outros fatores podem ser motivos de verificação ou não da ação da fitase sobre o desenvolvimento dos peixes. Ao final do experimento, concluiu-se que a fitase influenciou o desenvolvimento dos juvenis de tambaqui a partir da dose estimada em 1540,62 UFA kg-1 de dieta.

Keywords

ATP, Fish, Physiology, Fisiologia, Fitato, Phytate, Peixe

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Average
Average
Average
Green
gold