Toxicological tests assessing constructed wetlands systems for aquaculture effluents

• Grant number: 10/08097-5
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2011
• End date: August 31, 2013
• Field of knowledge: Biological Sciences - Pharmacology - Toxicology
• Principal Investigator: Claudio Martin Jonsson
• Grantee: Claudio Martin Jonsson
• Host Institution: Embrapa Meio-Ambiente. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). Jaguariúna , SP, Brazil
• Associated researchers: Denis Miguel Roston ; Julio Ferraz de Queiroz ; Lourival Costa Paraíba ; Mariana Silveira Guerra Moura e Silva

Abstract

Aquaculture is a commercial activity with great increasement in Brazil, not only because of biodiversity but also due to infrastructure and variety of aquatic ecosystems available for its explotation and development. Among negative impacts in aquaculture, there are organic wastes with high loads of total solids, turbidity and nutrients, which must be treated. The present study aims to assess the efficiency of natural treatment systems - like constructed wetlands - for fish farm effluents, which can be used by producers for environment monitoring in order to obtain certification. The adjustment of physico-chemical parameters and toxicological tests of different trophic levels of aquatic organisms will be employed for the insecticide diflubenzuron: the alga Pseudokirchneriella subcapitata, the microcrustacean Daphnia similis and the insect larvae of the genus Chironomus. (AU)