Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-10-26T12:43:39Z No. of bitstreams: 2 anselmo_eduardo_dupim.pdf: 330270 bytes, checksum: cf2f64bc5ce0056c6aec2761fbf19029 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-10-26T12:45:00Z (GMT) No. of bitstreams: 2 anselmo_eduardo_dupim.pdf: 330270 bytes, checksum: cf2f64bc5ce0056c6aec2761fbf19029 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Made available in DSpace on 2015-10-26T12:45:00Z (GMT). No. of bitstreams: 2 anselmo_eduardo_dupim.pdf: 330270 bytes, checksum: cf2f64bc5ce0056c6aec2761fbf19029 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) Previous issue date: 2011 / Objetivou-se com este trabalho comparar o desenvolvimento e sobreviv?ncia de p?s-larva de piabanha-do-pardo em diferentes densidades de peixes e diferentes concentra??es de substratos de biofiltros internos de concha/brita/cascalho. Al?m disso, avaliar a qualidade da ?gua das culturas submetidas aos tratamentos (temperatura, condutividade, pH, am?nia, nitrito, nitrato e ortofosfato). As larvas de Brycon sp., piabanha do Pardo, peixe amea?ado de extin??o na bacia do rio Pardo, foram de uma mesma desova, com um dia ap?s a eclos?o. As concentra??es de substratos de concha/brita/cascalho e diferentes densidades de estocagem de larvas (0g/15 larvas/L, 0g/60 larvas/L, 40g/15 larvas/L, 40g/60 larvas/L, 80g/ 15 larvas/L e 80g/60 larvas/L). Os resultados do mostraram que concentra??es maiores de biofiltros de concha/brita/cascalho tendem a limpar mais o meio de cultura, diminuindo os compostos nitrogenados, res?duos do metabolismo animal e permitindo um aumento da sobreviv?ncia, mas nem sempre aumentar implica em melhoria dos par?metros da ?gua. Culturas com substratos com diferentes concentra??es de concha/brita/cascalho d?o uma melhor resposta a diminui??o de compostos nitrogenados, propriedades da ?gua e conseguintemente melhora ao meio de cultura. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT This study aimed to compare the development and survival of post-larvae of the piabanha-do-Pardo densities of fish and different concentrations of substrates biofilters internal shell / gravel / gravel. In addition, to evaluate the water quality of the crops under treatments (temperature, conductivity, pH, ammonia, nitrite, nitrate and orthophosphate. The larvae of Brycon sp. Piabanha-do-Pardo, fish threatened with extinction in the Pardo River basin were from the same spawn, one day after hatching. Concentrations of substrates shell / gravel / pebble and different stocking densities of larvae (0g/15larvae/L, 0g/60larvae/L, 40g/15 larvae/L, 40g/60larvae/L, 80g/15larvae/L and 80g/60 larvae/L). The results showed that higher concentrations of biofilter shell / gravel / gravel tend to clean up the culture medium, reducing compounds nitrogen, residues of animal metabolism and allowing an increase in survival, but not always imply increase in improvement of water parameters. Substrates cultures with different concentrations of shell / gravel / pebble give a better response to reduced nitrogen compounds, properties of water and therefore improves the culture medium.