EVALUATION OF DIFFERENT BIOLOGICAL FILTERS MODELS IN THE AMAZON RIVER PRAWN Macrobrachium amazonicum (HELLER, 1897) HATCHERY

• Grant number: 15/20122-9
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2016
• End date: January 31, 2019
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Principal Investigator: Marcello Villar Boock
• Grantee: Marcello Villar Boock
• Host Institution: APTA Regional. Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
• Associated researchers: Fábio Rosa Sussel ; Helcio Luis de Almeida Marques ; Helenice Pereira de Barros ; Márcia Santos Nunes Galvão ; Patrícia Maria Contente Moraes Valenti ; Wagner Cotroni Valenti
• Associated scholarship(s): 18/09449-4 - Evaluation of two different Biological Filters models in the Amazon River prawn Macrobrachium amazonicum (Heller, 1897) hatchery, BP.TT

Abstract

The amazon river prawn Macrobrachium amazonicum is a indigenous freshwater prawn species with great potential for aquaculture. Although the hatchery techniques of that species were well developed experimentally, some studies aiming become the management easier and improving the biological filtration efficiency are still necessary, in order to reduce the production costs and to stimulate the implantation of hatcheries in Brazil. This project objectives comparing different biofilters models and assessing the availability of inoculation these filters with commercial nitrifying bacteria. Will be conducted two experiments: Experiment 1 - Control treatment (WBF): Hatchery Without Biological Filtration; Treatment 2 (CBF): Conventional Biological Filter (substrate made by marine mollusks shells); Treatment 3 (FTC): Filter Type "Canister" and Treatment 4 (EBF): Static Biological Filter; Experiment 2 - Control treatment (WFWI): hatchery Without Filtration and Without Inoculation; treatment 1 (WFI): hatchery Without Filtration and with Inoculation of commercial nitrifying bacteria in the water of experimental tanks; treatment 2 (CBFI): Conventional Biological Filter Inoculated with bacteria; treatment 3 (FTCI): Filter Type "Canister" Inoculated with commercial nitrifying bacteria. Both experiments will be replicated in order to confirm the results. The experimental design will be the randomized blocks, with five replicates of which treatment. In both experiments, the levels of ammonium (NH3), nitrite (NO2), nitrate (NO3), period of larval development, survival, yield and larvae gain of mass will be evaluated. (AU)