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Partial replacement of artificial diets by wet bioflocs biomass in Nile tilapia culture tanks Animal Sciences
Caldini, Nayara Nunes; Capistrano, Hermano Hertz de Almeida; Rocha-Filho, Pedro Roberto Nogueira; Sá, Marcelo Vinícius do Carmo e.
The present work aimed to assess the partial replacement of artificial diets by wet bioflocs biomass in the culture of Nile tilapia juveniles. Fish were fed on different combinations of commercial dry diets (CD) and wet bioflocs biomass (BF), as it follows: 75% CD + 25% BF, 50% CD + 50% BF, and 25% CD + 75% BF, dry matter basis. There were also positive control tanks in which the fish received only commercial diet (100% CD), and three negative control tanks where the reductions of dry diets were not compensated by wet bioflocs biomass (75% CD, 50% CD, and 25% CD). Bioflocs were produced in one 500-L outdoor tank, which did not belong to the culture system, and it was called “separate BFT tank”, in which there was a daily adjustment of the C: N ratio of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Bioflocs; Dry diet; Nutrition..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42426
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Feeding Nile tilapia with artificial diets and dried bioflocs biomass Animal Sciences
Caldini, Nayara Nunes; Cavalcante, Davi de Holanda; Rocha Filho, Pedro Roberto Nogueira; Sá, Marcelo Vinícius do Carmo e.
The effects of supplying dried bioflocs biomass to Nile tilapia juveniles were investigated in the present work. Fish were stocked in experimental rearing tanks for eight weeks. Selected variables of water quality, growth performance and effluent quality were evaluated. Fish were given different combinations of artificial diets and biofloc biomass, in wet (in natura) or dry form. As the supply of artificial diet decreased, the allowance of biofloc biomass increased in the same proportion. Biofloc biomass was produced in two 500-L tanks that received daily applications of dry molasses to adjust the C: N ratio of the water to 15: 1. The concentration of nitrite in water was only reduced in the tanks receiving wet bioflocs. The fish growth performance was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piscicultura; Tilápia aquaculture; Oreochromis; Water quality.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27043
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