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Organic selenium in the diet of Nile tilapia

The aim of this study to test the effect of organic selenium supplementation in the diets of Nile tilapia broodstock. Growth, reproductive performance and performance of fingerlings were evaluated. Eighty adult fish were used, with average weight of 121.7 g and divided into groups of four animals (3...

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Bibliographic Details
Published in:Acta scientiarum. Animal sciences 2009-10, Vol.31 (4), p.433
Main Authors: Pereira, Thiago Scremin, Fabregat, Thiago El Hadi Perez, Fernandes, Joao Batista Kochenborger, Boscolo, Camila Nomura, Castillo, Julian David Alvarado, Koberstein, Teresa Cristina Ribeiro Dias
Format: Article
Language:Spanish
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Summary:The aim of this study to test the effect of organic selenium supplementation in the diets of Nile tilapia broodstock. Growth, reproductive performance and performance of fingerlings were evaluated. Eighty adult fish were used, with average weight of 121.7 g and divided into groups of four animals (3 female and 1 male) stocked in 20 tanks with 1.5 cubic meters. The fish were fed five diets containing different levels of organic selenium (0.0, 0.25, 0.50, 0.75, and 1.0 mg [kg.sup.-1] ration). In the experimental period, females from all tanks were captured and the eggs collected. The experimental design was entirely randomized, with five treatments and four replicates. To evaluate progeny performance, the fingerlings were shared in four aquariums and fed during 30 days with commercial diet (45% CP). The supplementation with organic selenium did not affect the productive performance as with the reproductive parameters of the broodstock (p > 0.05). On the other hand, the broodstock fed with 0.50 mg of organic selenium produced fingerlings that presented improved weight gain (p < 0.05) compared to fish fed the control diet. Key words: minerals, nutrition, broodstock, culture tilapia. O objetivo deste trabalho foi avaliar o efeito da suplementacao de selenio organico na dieta de matrizes de tilapia-do-Nilo. Foi avaliado o desempenho zootecnico e reprodutivo das matrizes, assim como o crescimento das larvas (progenies). Utilizaram-se 80 peixes em idade reprodutiva, com peso medio de 121 g, divididos em grupos de quatro animais (tres femeas e um macho), estocados em 20 tanques de 1,5 [m.sup.3]. Os peixes foram alimentados com cinco dietas contendo niveis crescentes de suplementacao com selenio organico (0,0; 0,25; 0,50; 0,75 e 1,0 mg [kg.sup.-1] de racao). O delineamento experimental utilizado foi inteiramente casualizado com cinco tratamentos e quatro repeticoes. Para avaliar o desempenho zootecnico da progenie, as larvas produzidas de cada tratamento foram divididas em quatro aquarios e alimentadas durante 30 dias com racao comercial (45% PB). O desempenho zootecnico e reprodutivo das matrizes nao apresentou diferencas estatisticas (p > 0,05). Por outro lado, as matrizes que foram alimentadas com dietas suplementadas com 0,50 mg de selenio organico produziram larvas que apresentaram melhor (p < 0,05) ganho de peso em relacao as que receberam a dieta-controle. Palavras-chave: minerais, nutricao, reproducao, tilapicultura.
ISSN:1806-2636
DOI:10.4025/actascianimsci.v31i4.6300