Organismos planctônicos de sistemas de lagoas de tratamento de esgotos sanitários como alimento natural na criação de tilápia do Nilo

• Autor(a) principal: Sousa, Maíra Paula de
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5571
• topic: Plancton; Águas residuais; Oreochromis niloticus; Plankton; Sewage; Oreochromis niloticus; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

One alternative for water reuse is the utilization of estabilishing/polishing lagoons wastewater treated to supply pisciculture tanks. In estabilishing/polishing lagoons integrated to pisciculture system, the lagoons produce natural feed (plankton) to the fishes, and pisciculture tanks contribute with the better discarded water quality, reducing the eutrofization process in water receiver system. The knowledge of physical and chemistry parameters and the constitution of plankton community in this systems is very important, already that to production viability, is necessary determinate not only the quantity, but the quality from food, thus like evaluate the digestible efficiency of this natural food on culture fish species. In this research, a polishing lagoons system integrated to pisciculture tanks in pilot scale was evaluated with the objectives to (i) identify and quantify the most important phytoplankton and zooplankton organisms groups finding on wastewater treatment and pisciculture systems; (ii) identify which organisms are ingested, digested (all or partially), or no digested, by different sizes of Oreochromis niloticus (Nile Tilapia); and (iii) evaluate the effluent quality after its use in pisciculture tanks. Concluded that, the majority phytoplankton and zooplankton organisms finding on effluent treated were consume and digested, constituting fountain of natural food to Nile Tilapia; and that, the pisciculture system integrated to polishing lagoons system, act like one phase to the treatment, contributing with the final effluent s better water quality.