%0 Journal Article
%T ¡°Chlorella¡± sp. as a food supplement during the Nile tilapia larviculture "Chlorella" sp. como suplemento alimentar durante a larvicultura de til¨¢pia do Nilo
%A Fernanda Tamyres Martins da Costa
%A Francisco Ricardo Cavalcante dos Reis
%A Jos¨¦ Mairton Siqueira dos Santos
%A Simone Marques Maciel
%J Revista Brasileira de Sa¨²de e Produ£¿£¿o Animal
%D 2011
%I Universidade Federal da Bahia
%X This study aimed to evaluate the Chlorella sp. influence as a food supplement on Nile tilapia, Oreochromis niloticus, larviculture. The experimental design was completely randomized and consisted of three treatments and three replicates. In one treatment tilapias were cultured in the presence of Chlorella sp., in another one treatment fish were cultured in a green water from a fish growth tank and in the control tilapias were cultured in a natural food free water (clear water). During all the experiment tilapias were fed with commercial ration containing male hormone. Through the regression line between the values of optical density and cell density of the cultivation water, it was always possible to demonstrate a Chlorella sp. higher consumption compared to the water green microalgae consumption which was almost entirely (95%) composed by the genus Microcystis. Performance and survival data statistical analysis showed that fish cultured in the presence of Chlorella sp. achieved significantly higher results. The highest mortality was observed when tilapias were culture in the green water. The use of Chlorella sp. as a food supplement on tilapias larviculture maximized fish performance, while the consumption of microalgae from the genus Microcystis or a natural food free culture showed a negative influence on animals performance. Este trabalho teve por objetivo avaliar a influ¨ºncia de Chlorella sp. como suplemento alimentar na larvicultura da til¨¢pia do Nilo, Oreochromis niloticus. O delineamento experimental foi inteiramente casualizado e constituiu de tr¨ºs tratamentos com tr¨ºs repeti  es cada. Em um dos tratamentos, as til¨¢pias foram cultivadas na presen a de Chlorella sp., no outro tratamento os peixes foram cultivados em ¨¢gua verde de um tanque de piscicultura e, no controle, as til¨¢pias foram cultivadas em ¨¢gua isenta de alimento natural (¨¢guas claras). Durante todo o experimento as til¨¢pias foram alimentadas com ra  o comercial contendo horm nio masculino. Atrav¨¦s da reta de regress o entre os valores de densidade ¨®ptica e da densidade celular da ¨¢gua de cultivo foi poss¨ªvel demonstrar que houve consumo superior de Chlorella sp., quando comparado ao consumo de microalgas da ¨¢gua verde, constitu¨ªda, quase na sua totalidade (95%), pelo g¨ºnero Microcystis. Em rela  o aos dados de desempenho e sobreviv¨ºncia, a an¨¢lise estat¨ªstica evidenciou que os peixes cultivados na presen a de Chlorella sp. alcan aram resultados significativamente superiores. A maior mortalidade foi observada quando as til¨¢pias foram cultivadas na ¨¢gua verde. A utiliza  o de Chlorel
%U http://revistas.ufba.br/index.php/rbspa/article/view/2094