Substratos artificiais melhoram a qualidade da água em sistema de cultivo multitróficos e multiespaciais?

• Ano de defesa: 2014
• Autor(a) principal: Andrion, Bruno Cardoso [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Água; Água - Qualidade; Agua - Analise; Perifíton; Substratos; Water quality
• Link de acesso: http://hdl.handle.net/11449/108918

In aquaculture the use of farming systems without water renewal, the use of artificial substrates with fixing periphyton and integrated systems may be alternative ways to improve the current production systems, generating higher profits and lower environmental impact. The aim of this study was to analyze the water quality in polyculture systems with insertion of artificial substrates, made of bamboo and geotextile blanket, in a production of nile tilapias (Oreochromis niloticus) and amazon river prawns (Macrobrachium amazonicum), also identified the substrate with higher growth of periphyton . The experiment lasted six months, being composed of 12 rectangular ponds natural background , populated with 22 prawns.m-2 and 1,1 tilapias.m-2, with food offer only the tilapia . The experimental design was completely randomized with three treatments (control, bamboo and blanket) and four replications. Water samples and periphyton scraped from the substrates were analyzed. The results indicate no significant difference in water quality, probably due to the large amount of suspended solids, which prevented the development of periphyton and due to the low biomass of animals produced, not influencing the concentrations of nitrogen and phosphorus in the water The substrate resulted in the highest growth of periphyton was treating geotextile