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Management of Biofloc Concentrations as an Ecological Strategy for Microbial Control in Intensive Shrimp Culture by Copetti, Fabrini (author);Gregoracci, Gustavo Bueno (author);Vadstein, Olav (author);Schveitzer, Rodrigo (author) is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Management of Biofloc Concentrations as an Ecological Strategy for Microbial Control in Intensive Shrimp Culture about?

This study investigated if the intensity of sedimentation through settling tanks modifies the bacterial community composition of biofloc systems and affects performance of shrimp. A 50-day trial, which was conducted with Pacific White Shrimp juveniles (2.6 g ± 0.0 g) stocked at a density of 906 shrimp m−3, evaluated two different biofloc concentrations, i.e., total suspended solids: T500 (~ 500 mg L−1) and T700 (~ 700 mg L−1). To characterize the bacterial community, 40 water samples were taken for high throughput 16S-rDNA amplicon sequencing. Water quality variables were statistically similar among treatments and remained within the appropriate range for shrimp growth. No significant difference in the performance of animals was observed between treatments. Shrimp survival was high in both treatments (~ 90%), but the coefficient of the variation was 5.5 times higher in T500 (11.5%) than that observed in the T700 (2.1%). Bacterial richness was higher in T700, and composition of the bacterial community was different from that of the T500. We argue that a higher intensity of sedimentation, which decreased the TSS level in the T500, promoted changes in the microenvironment of these tan

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Author

Copetti, Fabrini (author);Gregoracci, Gustavo Bueno (author);Vadstein, Olav (author);Schveitzer, Rodrigo (author)

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)