Microalga Schizochytrium sp. em dietas para juvenis de piau

Autor: Prates, Aline Danielle Souza
Jazyk: portugalština
Rok vydání: 2016
Předmět:
Zdroj: Repositório Institucional da UFVJMUniversidade Federal dos Vales do Jequitinhonha e MucuriUFVJM.
Druh dokumentu: masterThesis
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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)
A ingest?o de alimentos enriquecidos com ?cidos graxos poliinsaturados (PUFAs) da s?rie ?mega-3 vem sendo difundida nas ?ltimas d?cadas. A eleva??o dos n?veis dos ?cidos eicosapentan?ico (EPA) e docosaexan?ico (DHA) pode ser obtida por meio do enriquecimento da alimenta??o dos animais criados em cativeiro, manipulando-se a composi??o dos ?cidos graxos da dieta. O objetivo deste trabalho foi avaliar dietas contendo a inclus?o da microalga Schizochytrium sp. no desempenho produtivo e composi??o bromatol?gica de juvenis de piau. O experimento foi conduzido no Laborat?rio de Aquicultura e Ecologia Aqu?tica do Departamento de Zootecnia da Universidade Federal dos Vales do Jequitinhonha e Mucuri, em Diamantina ? MG. Foram utilizados 300 juvenis de piau com peso m?dio e comprimento total m?dio de 11,80 ? 1,08 g e 9,68 ? 0,31 cm, respectivamente. Os peixes passaram por sete dias de adapta??o ao ambiente e neste per?odo foram alimentados com a ra??o do tratamento controle. Utilizou-se um delineamento inteiramente casualizado, com cinco tratamentos (0, 10, 20, 30 e 40 g de Schizochytrium sp. kg-1) e quatro repeti??es, com sete juvenis estocados por aqu?rio, totalizando em 20 parcelas experimentais. Avaliou-se aos 60 dias de experimento os par?metros de desempenho produtivo: ganho de peso (g), biomassa final (g), consumo de ra??o (g), convers?o alimentar, taxa de crescimento espec?fico (TCE) (% dia-1), sobreviv?ncia (%) fator de condi??o (K), e par?metros bromatol?gicos da carca?a: mat?ria seca (MS), mat?ria mineral (MM), extrato et?reo (EE), prote?na bruta (PB), c?lcio (Ca) e f?sforo (P). Foi observado efeito linear crescente (p0,05) diferen?as para mat?ria seca, mat?ria mineral, extrato et?reo, exceto para a prote?na bruta, c?lcio e f?sforo que apresentaram efeito linear decrescente (p
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.
The food intake enriched with polyunsaturated fatty acids, omega-3 series, has been widespread in the recent decades. The increase of the EPA and DHA levels can be obtained by enriching the animals feed raised in captivity, by manipulating the fatty acids composition of dietary. This study aimed to evaluate diets with the inclusion of algae Schizochytrium sp. in the productive performance and chemical composition of piau juveniles. The experiment was conducted in the Aquaculture Laboratory of Aquatic Ecology Department of Animal Science of UFVJM in Diamantina - MG. Three hundred piau juvenile with mean weight and total length of 11.80 ? 1.08g and 9.68 ? 0.31 cm respectively, were subjected. Fishes passed for seven days of adaptation and were fed with the control feed treatment. A completely randomized design was used with five treatments (0, 10, 20, 30, and 40 g of Schizochytrium sp. Kg-1), and four replications, with seven juveniles were stocked through aquariums, totaling 20 experimental units. It was evaluated at 60th day of experiment the performance parameters such as weight gain (g), final biomass (g), feed intake (g), feed conversion, TCE (% day-1), survival (%) and condition factor (K), and bromatological parameters of the carcass: Dry matter (DM), mineral matter (MM), ethereal extract (EE), crude protein (CP), calcium (Ca) and phosphorus (P). Increasing linear effect (p 0.05) for dry matter, mineral material, ethereal extract, except for crude protein, calcium and phosphorus, which presented a linear decreasing effect (p
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