Abstract
In order to minimizethe losses caused in the production of jundia fingerlings because of its high susceptibility toich, dietary supplementation (0, 250, 500, 1000 and 2000 mg kg -1 ) of ascorbic acidmonophosphate was tested. Each diet was fed to four groups of fish (initial average weight 9.21 ± 0.26 g), during 45 and 60 days. At the end of the feeding period ich challenge wasperformed, and eight days later the fingerlings level of infection was assessed. The dietaryvitamin C concentration and/or the feeding period did not affect significantly (p>0.05) theinfection level by ich, survival and growth of the jundias. The results obtained and themethodologies defined here for experimental infection and for evaluation of jundia level ofinfection will be useful in future studies that also aim at verifying the influence of thisimportant vitamin on the susceptibility of jundia to ich.
Highlights
A piscicultura em água doce no Brasil baseia-se principalmente na criação de espécies exóticas, tais como a tilápia
In order to minimize the losses caused in the production of jundiá fingerlings
Each diet was fed to four groups of fish
Summary
Para obtenção das concentrações desejadas de vitamina C (250, 500, 1000 e 2000 mg kg-1), quantidades crescentes de ácido ascórbico monofosfatado (Rovimix Stay C® – 35% atividade – Roche), foram adicionadas à uma dieta basal em substituição à celulose (Tabela 1). Ingredientes e composição centesimal das dietas experimentais (% matéria seca)
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