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Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O presente estudo foi realizado durante 24 dias, em janeiro de 2013, CODEVASF, em Tr?s Marias, Minas Gerais. O primeiro experimento teve como objetivo verificar o momento adequado para a transi??o alimentar, de art?mia para ra??o, no desempenho das larvas de curimat?. O experimento foi realizado em delineamento experimental inteiramente ao acaso, com cinco tratamentos e seis repeti??es. As larvas foram alimentadas com n?uplios de art?mia nos dois (ART2), quatro (ART4), seis (ART6) e oito (ART8) primeiros dias e posteriormente ra??o at? 24? dia e somente com ra??o durante todo o per?odo experimental (Ra??o). Ao t?rmino foi observada a taxa de sobreviv?ncia, biomassa, taxa de crescimento espec?fico e fator de condi??o de Fulton. Tamb?m verificou-se o oxig?nio dissolvido, pH, condutividade el?trica, temperatura, concentra??o de ?ons am?nio e fosfato da ?gua de cada tanque no 7?, 14? e 21? dia do experimento. J? o segundo experimento foi dividido em duas partes: a primeira parte teve como objetivo verificar o tempo de digest?o no 14? e 24? dia de experimento das larvas submetidas ao alimento vivo. E a segunda parte avaliou o desempenho de larvas alimentadas 2, 3 e 4 vezes ao dia. Para compara??o entre o tempo de digest?o nos diferentes dias de amostragem foi utilizada uma regress?o linear e para o experimento de diferentes frequ?ncias alimentares um delineamento experimental inteiramente casualizado com tr?s tratamentos e quatro repeti??es. Ao t?rmino do experimento foi observada a taxa de sobreviv?ncia, biomassa, fator de condi??o de Fulton, n?mero de itens no trato, largura e comprimento da boca das larvas. Verificou-se o oxig?nio dissolvido, pH, condutividade el?trica, temperatura, concentra??o dos ?ons am?nio e fosfato da ?gua de cada tanque no 14? e 24? dia do experimento. Tais an?lises de qualidade de ?gua tamb?m foram feitas para o estudo de frequ?ncia alimentar no 7?, 14? e 21? dia do per?odo experimental. Concluiu-se que a oferta de alimento vivo at? o quarto dia de experimenta??o foi o que apresentou melhores resultados para a larvicultura do curimat?. Al?m disso, tempo de digest?o no 14? dia foi estimado em 15 h e 29 min e no 24? dia 11 h e 44 min, verificou-se ainda a utiliza??o de diferentes frequ?ncias de arra?oamento n?o interferem no desempenho dos animais. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT This study was conducted during 24 days in January 2013 in Codevasf in Tr?s Marias, Minas Gerais. The first trial aimed to determine the appropriate time for the food transition, brine shrimp to feed, the larvae performance curimat?. The trial was conducted in a completely randomized experimental design with five treatments and six replications. The larvae were fed brine shrimp nauplii in the first two (ART2), four (ART4), six (ART6) eight (ART8) days and subsequently ration until 24th day and only with feed throughout the experimental period (ration). At the end of the survival rate, biomass, specific growth rate and Fulton condition factor was observed. Also there was the dissolved oxygen, pH, conductivity, temperature, concentration of ammonium and phosphate ions of each water tank on the 7th, 14th and 21st day of the experiment. The second experiment was divided into two parts: the first part aimed to verify the digestion time in the 14th and 24th day of the experiment the larvae subjected to the live feed. The second part assessed the performance fed larvae 2, 3 and 4 times per day. For comparison of the digestion time in different days of sampling linear regression was used for the experiment and different feeding frequencies an experimental randomized design with three treatments and four replications. At the end of the trial the survival rate, biomass, Fulton condition, number of items in the tract, mouth width and length of the larval mouth factor was observed. It was found dissolved oxygen, pH, conductivity, temperature, concentration of ammonium and phosphate ions from each tank of water on the 14th and 24th day of the experiment. Such analyzes of water quality were also made to the study of feeding frequency on the 7th, 14th and 21st day of the experimental period. It is concluded that the supply of live food until the fourth day of trial showed the best results for the larval rearing of curimat?. Furthermore, digestion time on the 14th day was estimated at 15 h and 29 min and at 24 th on 11 h 44 min there was also the use of different frequencies do not interfere with feeding of animal performance.
| Identifer | oai:union.ndltd.org:IBICT/oai:acervo.ufvjm.edu.br/jspui:1/318 |
| Date | 21 February 2014 |
| Creators | Dias, Maria Let?cia Fernandes |
| Contributors | Moura, Guilherme de Souza, Lanna, Eduardo Arruda Teixeira, Moura, Guilherme de Souza, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Pedreira, Marcelo Mattos |
| Publisher | UFVJM |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFVJM, instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri, instacron:UFVJM |
| Rights | A concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data., info:eu-repo/semantics/openAccess |
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