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Bueno G.W.,University of Brasilia | Ostrensky A.,Federal University of Paraná | Canzi C.,Itaipu Binacional | de Matos F.T.,Brazilian Agricultural Research Corporation EMBRAPA Fisheries and Aquaculture | Roubach R.,Ministry of Fisheries and Aquaculture
Reviews in Aquaculture | Year: 2015

The Brazilian Government has been promoting studies on the zoning and demarcation of aquaculture parks dedicated to the production of fish in net-cages in the large public reservoirs of the country. The methodology employed for the zoning of these aquaculture parks consists of the execution in three consecutive stages of multidisciplinary evaluations for their social, environmental and economical characterization (global, regional and local). The purpose of the studies involves the generation of thematic maps and scenarios of environmental models that facilitate the process of understanding the regional peculiarities and taking the decisions to identify the most appropriate areas for the installation of the aquaculture parks. The application of this instrument for zoning the reservoirs will assist a more effective planning of investments and efforts, both by the government and by private initiative, in the aquaculture activity. With the implantation of aquaculture parks along the lines of an ecosystemic aquaculture, Brazil has the potential to become one of the largest producers of fish in net-cages in the world. © 2013 Wiley Publishing Asia Pty Ltd.

de Matos F.T.,Brazilian Agricultural Research Corporation | Lapolli F.R.,Federal University of Santa Catarina | Mohedano R.A.,Federal University of Santa Catarina | Fracalossi D.M.,Federal University of Santa Catarina | And 2 more authors.
Journal of Applied Aquaculture | Year: 2014

We evaluated the bioconversion of domestic wastewater into protein biomass through duckweed based ponds and fish farming in a pilot recirculating system. The average duckweed wet biomass yield obtained during the experimental period was 4.96 kg/m2 (1.3 kg dry matter; 63 g/m2/day), with crude protein and fiber content of 38.03% and 16.17%, respectively. Tilapia final average weight, feed conversion rate, and specific growth rate when fed pelletized duckweed were similar to values with commercial feed. Duckweed production removed 30.8% and 28.7% of ammonia and phosphate, respectively, from stabilized domestic wastewater. © Taylor & Francis Group, LLC.

Martins M.G.,Federal University of Pará | Martins D.E.G.,Ministry of Fisheries and Aquaculture | Pena R.D.S.,Federal University of Pará
LWT - Food Science and Technology | Year: 2015

The convective drying kinetics and hygroscopic behavior of pirarucu (Arapaima gigas) fillet with different NaCl contents (up to 40g/100g dry basis - d.b.) were studied. Pieces of fillet (5×3×1cm3) were subjected to salting and drying in a fixed-bed with an airflow velocity of 1.5m/s at 50°C, and kinetic models were fitted to the drying data. Adsorption and desorption isotherms at 25°C were built for the dry products and mathematical models were fitted to the sorption data. The effective diffusivity values showed that increased NaCl content in the product favored the drying process. Midilli, diffusion approximation and Page models were effective in predicting the drying kinetics of the products. In natura fillet showed type II isotherms while the addition of NaCl caused a change in behavior for type III isotherms. The adsorption indicated that a moisture level up to 15g/100gd.b. ensures the microbiological stability of all products. The Halsey model showed good fit to the sorption data of products with up to 20g NaCl/100gd.b., while the GAB model was efficient in predicting the isotherms for fresh fillet and for products with 30 and 40g NaCl/100gd.b. © 2015 Elsevier Ltd.

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