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January 24, 2014

Mexico

Vibrios, Biofloc and Penaeus vannamei

 

From Abstract: In this study, researchers compared biofloc and clear water systems for rearing juvenile Penaeus vannamei.  They also evaluated the Vibrios in the systems.  Survival rates were recorded and a probiotic was tested under both conditions.  Daily growth rate was higher in the biofloc system than in the clear water system, and survivals in both systems increased significantly when a probiotic was included in the diet.  Vibrios from the hepatopancreas and the water did not differ much between the two systems; however, a novel group of Vibrio strains was found to be unique to the biofloc system.  No high level lesions were observed in shrimp tissues from the biofloc/probiotic treatment, which suggests that the probiotic contributed to homeostasis and prevented an outbreak of opportunistic pathogenic species.

 

Source: Aquaculture.  Probiotic Effect of FLOC on Vibrios in the Pacific White Shrimp Litopenaeus vannamei.  Diana Aguilera-Rivera, Alejandra Prieto-Davó, Karla Escalante, Cristina Chávez, Gerard Cuzon and Gabriela Gaxiola (email mggc@ciencias.unam.mx, UMDI-Sisal, Faculty de Ciencias, UNAM, Mexico).  In Press, available on line January 18, 2014.

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