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May 30, 2014


Feed Cost Compared in Biofloc and Semi-Intensive Systems


The aims of this research were to evaluate the performance and dietary cost for the marine shrimp (Penaeus vannamei) cultured in a super intensive biofloc system and a conventional semi-intensive system using diets containing different protein levels.  Four different diets, with crude protein (CP) contents of 24.3, 30.3, 32.9 and 36.7 percent were produced.  In the laboratory, experimental culture in the biofloc system was performed in twelve experimental units at a density of 250 shrimp per cubic meter.  The four treatments were performed in triplicate.  The semi-intensive culture system was applied at the commercial farm in eleven ponds containing 15.5 shrimp per square meter.  After 49 days, the performance of the shrimp was rated, and the cost per kilogram of shrimp produced by both culture systems was calculated.  In the semi-intensive system, the shrimp fed with a diet containing 32.9 % CP showed a higher final weight and weight gain and a lower dietary cost.  In the biofloc system, a higher final weight, weight gain, growth rate and productivity were observed in shrimp fed diets containing 30.3, 32.9 and 36.7 % CP, compared with those fed a diet containing 24.3 % CP.  The lowest dietary cost in the biofloc system was with shrimp fed the 30.3 % CP diet, whereas, in the semi-intensive system, the highest final weight, highest weight gain and lowest cost were observed in shrimp fed the 32.9 % CP diet.


Source: Aquaculture.  Protein Levels for Litopenaeus vannamei in Semi-Intensive and Biofloc Systems. Adolfo Jatobá (email, Federal Institute of Education, Science and Technology of Santa Catarina (IFC), Campus Araquari, Aquaculture Laboratory, Rodovia BR 280, Km 27 - CX Postal 21, 89245-000 Araquari, Santa Catarina, Brazil, phone + 55-47-3803-7200, fax + 55-47-3803-7201), Bruno Corrêa da Silva, Jairo Souza da Silva, Felipe do Nascimento Vieira, José Luiz Pedreira Mouriño and Walter Quadros Seiffert.  In Press, Accepted Manuscript, Available Online May 23, 2014.

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