Balanço de nitrogênio, fósforo e carbono em sistema multiespacial e multitrófico de cultivo de tilápia-do-Nilo e camarão-da-Amazônia

• Ano de defesa: 2015
• Autor(a) principal: David, Fernanda Seles [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Peixe - Nutrição; Tilápia-do-Nilo; Camarão; Nitrogenio; Fósforo; Carbono; Substratos; Perifíton; Fishes
• Link de acesso: http://hdl.handle.net/11449/143034; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-07-2016/000866923.pdf

The present study investigated the use of nitrogen (N), phosphorus (P) and carbon (C) in Integrated Multi-Trophic Aquaculture (IMTA) systems with Amazon River prawn and Nile tilapia. In addition, it provides information about the effect of the addition of different substrates in these systems. The experimental design was completely randomized, with three treatments and four replications: control, without substrate (WS); substrate made of geotextile blanket (GS); and substrate made of bamboo (BS). The results showed that diet was the main input of nutrients in the budgets (~ 66% N, ~ 56% P and 59% Organic C), followed by the inlet water (~ 31% N, ~ 24% P and 34 % Total C). The recovered portion of C in tilapias was more effective in GS treatment than in BS treatment. Recovered portions of N and P by reared animals did not differ among treatments. Sediment was the compartment that accumulated more nutrients (~ 31% N, ~ 64% P and ~ 54% OC). The outlet water was less harmful, with regarding to P, in treatments with addition of substrates. Gas exchange between ponds and atmosphere showed the important role of denitrification by releasing representative quantities of N2 (~ 32% N) and the potential of this system for the absorption of greenhouse gases (~ 6.2% C). The mapping of N, P and C in each compartment of the system allowed the understanding of invested resources destination and pointed out that periphyton development needs further attention to increase system's efficiency