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| Cavalcante, Davi de Holanda; Lima, Francisco Roberto dos Santos; Rebouças, Vanessa Tomaz; Sá, Marcelo Vinícius do Carmo e. |
| The objective of the present work was to assess the possible benefits of the installation of underwater structures for periphyton in bioflocs tanks for Nile tilapia, Oreochromis niloticus, submitted to feed restriction (artificial diet). The experimental treatments evaluated were: (1) BFT: bioflocs technology for aquaculture with no feed restriction; (2) BFT-30: the same as (1) but with feed restriction at 30%; (3) BP: biophyton technology for aquaculture, that is, integration between bioflocs and periphyton in the same rearing unit, with no feed restriction; (4) BP-30: the same as (3) but with feed restriction at 30%. The underwater structures for periphyton in the BP and BP-30 tanks were not able to reduce the concentrations of ammonia, nitrite, nitrate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquicultura aquaculture; Bioflocs; Environmental sustainability.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33122 |
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| Bittencourt, Fábio; Damasceno, Danielle Zanerato; Lui, Tatiane Andressa; Signor, Altevir; Sanches, Eduardo Antônio; Neu, Dacley Hertes. |
| Transportation of live fish is routinely done in aquaculture; therefore, the aim of this study was to analyze the water quality and survival rate of Rhamdia quelen fry (2.55±0.44 g) following 4, 8 and 12h of simulated transportation, at stock densities of 30 and 60 fry 5 L-1 and temperatures 15, 20 and 25oC. Dissolved oxygen, pH, electrical conductivity, total ammonia, nitrite, nitrate, turbidity, total alkalinity and survival were analyzed. Temperature and time had a significant influence on ammonia, pH, electrical conductivity, and dissolved oxygen levels, and fish died after 12 hours of transportation simulation when kept at 20 and 25ºC. The density directly affected the water quality parameters, such as the increase in electrical conductivity and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Recursos Pesqueiros e Engenharia de Pesca; Aquicultura aquaculture; Ammonia; Loading densities; Management; Mortality.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/37285 |
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