Parâmetros bióticos e abióticos em tanques de piscicultura tratados com macrófita aquática e perifíton

• Ano de defesa: 2015
• Autor(a) principal: Penariol, Iara Carolina [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Aquicultura; Agua - Purificação - Tratamento biologico; Água - Qualidade; Fitoplâncton; Zooplâncton; Water Purification Biological treatment
• Link de acesso: http://hdl.handle.net/11449/132659; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/10-12-2015/000854786.pdf

Aquaculture has become an important and lucrative agricultural activity, with great commercial and social interest, however can be highly impacting to the environment if not managed properly. Proper management of fish farming in pond systems and nurseries is to maintain water quality, since the production of aquatic organisms is dependent on external subsidies as the supply of nutrients, generating waste, whose accumulation in the system, can be harmful the fish, the aquatic microbiota and the receiving body and effluents that activity. Macrophytes and periphyton are important tools acting as biofilters and minimizing the concentrations of organic material, influencing the quality of water and the organisms living there. The aim of this study was to evaluate the efficiency of water treatment fishponds and their effluent using aquatic macrophytes and / or periphyton evaluating their influence on water quality and the consequent influence on plankton community. The study was developed in UNESP Aquaculture Center (CAUNESP), where they were used four tanks of 40 m2 and 1.5 deep, with different treatments (macrophyte and / or periphyton) receiving the same water supply. It was observed that the presence of the treatments had a direct influence on biotic and abiotic conditions of the ponds, acting in richness and abundance of planktonic species. Through the results it was observed that the pond without aquatic plant and / or periphyton was associated with variables, temperature, conductivity, orthophosphate, total phosphorus, BOD5, thermotolerant coliform, total ammonia nitrogen, total suspended solids and turbidity. This condition provided the predominance of plankton community correlated positively to these factors, such as Rotifers, Copepods Cyclopoida, Cyanobacteria and Xanthophyceae, considered indicators of eutrophic bodies environment. In the treatment only with macrophytes, lower nutrient concentrations and increased transparency ...