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No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) marcelo_gaspary_martins.pdf: 937192 bytes, checksum: 616d06da3121598310ea00d8e63279cd (MD5) Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Na atual nutri??o de precis?o, a maximiza??o do aproveitamento dos nutrientes ? otimizada pelo uso de aditivos, que s?o importantes tamb?m para redu??o da excre??o de compostos potencialmente poluentes ao meio ambiente, como o nitrog?nio e o f?sforo. Com isso, objetivou-se,com o desenvolvimento de dois experimentos:avaliar o desempenho de juvenis til?pia do Nilo submetidos a ra??es extrusadas contendo o complexo enzim?tico SSF (solid station fermentation)adicionado em diferentes etapas do processamento (antes e ap?s a extrus?o), e o desenvolvimento de juvenis tambacu com ra??es contendo diferentes n?veis do mesmo complexo enzim?tico. No experimento 1 com til?pia, foram utilizados 140 animais distribu?dos em 5 tratamentos: sem enzimas (Controle), 400ppm de complexo enzim?tico SSF na mistura antes da extrus?o (AE400), 800ppm de complexo enzim?tico SSF na mistura antes da extrus?o (AE800), 400ppm de complexo enzim?tico SSF adicionados ?on top? ap?s a extrus?o (DE400), 800ppm decomplexo enzim?tico SSF adicionados ?on top? ap?s a extrus?o (DE800) com 4 repeti??es, totalizando 20 unidades experimentais. J? no experimento 2 com o tambacu foram utilizados 240 animais distribu?dos em 6 tratamentos:sem enzimas (Controle); Inclus?o de 200ppm (DE200); Inclus?o de 400ppm (DE400); Inclus?o de 600ppm (DE600); Inclus?o de 800ppm(DE800); Inclus?o de 1000ppm (DE1000), com 4 repeti??es, totalizando 24 unidades experimentais. Em ambos experimentos as ra??es experimentais continham a mesma formula??o, diferenciando apenas nos n?veis de inclus?o do complexo enzim?tico SSF. Os peixes foram alimentados 4 vezes ao dia (8, 11, 14 e 17 h), at? a saciedade evitando sobras de alimento. Os ensaios foram conduzidos durante 56 dias em um sistema de recircula??o com controle de temperatura, aera??o e luz. No experimento 1 notou-se que as ra??es contendo o complexo enzim?tico SSF influenciaram positivamente o ganho de peso, sendo a inclus?o do complexo enzim?tico ap?s o processo extrus?o favor?vel ao desempenho, recomendando-se para til?pias a inclus?o de 800 ppm ?on top?. J? no experimento 2, observou-se que a inclus?o de 600 ppm de complexo enzim?tico SSF ?on top?, em ra??es para tambacus, promove melhores ?ndices de convers?o alimentar, n?o sendo observado melhorias neste mesmo par?metro com o aumento da inclus?o deste complexo, sendo recomendado a inclus?o de 600 ppm ?on top? em ra??es para tambacus. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT In the current nutrition precision, maximizing the utilization of nutrients is optimized by the use of additives, which are also important for reducing the excretion of compounds potentially pollute the environment, such as nitrogen and phosphorus. Thus, we aimed at, with the development of two experiments to assess the performance of juvenile Nile tilapia subjected to extruded feed containing the enzyme complex SSF (solid fermentation station) added at different stages of processing (before and after extrusion) and the development of tambacu juveniles with diets containing different levels of the same enzyme complex. In experiment 1 with tilapia, 140 animals distributed in five treatments (control (no enzyme), 400 ppm SSF enzyme complex in the mixture prior to extrusion (AE400), 800 ppm SSF enzyme complex in the mixture prior to extrusion (AE800 were used) 400 ppm enzyme "on top" complex SSF added after extrusion (DE400), 800 ppm SSF enzyme complex added "on top" after extrusion (DE800)) with four replications, totaling 20 experimental units. Inclusion of 200 ppm (DE200); Inclusion of 400 ppm (DE400); Inclusion of 600 ppm (DE600), whereas in experiment 2 with tambacu 240 animals distributed into six treatments (Control (without enzymes) were used Inclusion 800 ppm (DE800); Inclusion 1000 ppm (DE1000)) with four replications, totaling 24 experimental units. In both experiments the experimental diets contained the same wording, differing only in the inclusion levels of the enzyme complex SSF. The fish were fed four times a day (8, 11, 14 and 17 hr) to satiation avoiding feed leftovers. The tests were conducted for 56 days in a recirculation system with temperature control, aeration and light. In experiment 1 it was noted that the diets containing the enzyme complex SSF positively influenced weight gain, and the inclusion of the enzyme complex after the extrusion process conducive to performance, recommending the inclusion of tilapia to 800 ppm "on top". In the second experiment, it was observed that the inclusion of 600 ppm SSF enzyme complex "on top" in rations for tambacus promotes better feed conversion ratios. No improvement was observed in the same parameter with increasing inclusion of this complex, being recommended the inclusion of 600 ppm "on top" in rations for tambacus.