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.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T13:48:48Z No. of bitstreams: 2 eglerson_duarte.pdf: 707090 bytes, checksum: 4f4380e4c6b75fa584a38534f80e0a54 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T13:49:29Z (GMT) No. of bitstreams: 2 eglerson_duarte.pdf: 707090 bytes, checksum: 4f4380e4c6b75fa584a38534f80e0a54 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-17T13:49:29Z (GMT). No. of bitstreams: 2 eglerson_duarte.pdf: 707090 bytes, checksum: 4f4380e4c6b75fa584a38534f80e0a54 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2011-11-25 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Banco do Nordeste do Brasil (BNB) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Objetivou-se com esse trabalho, avaliar a propor??o ideal de concha calc?ria/brita em biofiltro, no cultivo de p?s-larvas de til?pia do Nilo. O experimento foi realizado no Laborat?rio de Aquicultura da UFVJM, entre os dias 21 de julho e 3 de agosto de 2011. P?s-larvas de til?pia do Nilo na densidade de 13,3 p?s-larvas/L foram cultivadas em aqu?rios contendo biofiltros com 100% concha calc?rias; 70% concha calc?ria/30% brita; 50% concha calc?ria/50% brita; 30% concha calc?ria/70% brita; 10% concha calc?ria/90% brita; 100% brita e como controle, aqu?rio sem biofiltro, em DIC, totalizando sete tratamentos com tr?s repeti??es. Os dados limnol?gicos e biom?tricos foram submetidos ? ANOVA e as m?dias foram comparadas pelo teste de Duncan com p?0,05. Para comparar os tratamentos que evolveram uma propor??o concha calc?ria/brita, foi feita uma an?lise de regress?o considerando n?vel de signific?ncia de 5%. Todas as concentra??es de concha calc?ria/brita apesar de n?o influenciarem nos par?metros morfol?gicos, mantiveram as condi??es da ?gua adequadas para o cultivo de til?pia do Nilo, com exce??o dos n?veis de am?nia, que em sua grande maioria, apresentaram-se acima da concentra??o recomendada para til?pias. Entretanto a n?o toxicidade aparente da am?nia, no presente trabalho, pode estar relacionada aos valores de pH, que se mantiveram pr?ximos do neutro possibilitando uma menor toxicidade do ?on am?nio. A propor??o 30% de concha calc?ria e 70% de brita ? recomendada como substrato de biofiltro, por apresentar a melhor taxa de nitrifica??o ao longo do experimento. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT The objective of this study was to evaluate the optimal ratio of calcareous shell /gravel in biofilter, in the cultivation of post-larvae of Nile tilapia. The experiment was conducted at the UFVJM?s Laboratory of Aquaculture, between July 21 and August 3, 2011. Post-larvae of Nile tilapia in the density of 13.3 post larvae/L were grown in aquariums containing biofilters with 100% calcareous shell, 70% calcareous shell/30% gravel, 50% calcareous shell/50% gravel, 30% calcareous shell/70% gravel, 10% calcareous shell/90% gravel and 100% gravel; and as control sample, a aquarium without biofilter in DIC, summing seven treatments with three replications. Limnological and biometric data were submitted to ANOVA and measurements were compared by Duncan test at p?0.05. To compare the treatments that have evolved a proportion of calcareous shell/gravel, there has been carried out a regression analysis considering a significance level of 5%. All concentrations of calcareous shell/gravel did not influence negatively on morphological parameters and kept water conditions suitable for the cultivation of Nile tilapia, except for the observed levels of ammonia, which were mostly above the recommended for tilapia. However, the apparent non-toxicity of ammonia in the present study may be related to pH values, which remained close to neutral allowing a lower toxicity of the ammonium ion. The proportion of 30% calcareous shell and 70% gravel substrate is recommended as biofilter for presenting the best rate of nitrification during the experiment.