28. Oct, 2018

Comparing biofloc, clear-water and hybrid RAS systems as shrimp nurseries

Comparing biofloc, clear-water and hybrid RAS systems as shrimp nurseries

Monday, 8 October 2018 Thomas W. Tierney, M.S. Andrew J. Ray, Ph.D
 
Results show that all systems are suitable for RAS shrimp nursery production
 
Recirculating aquaculture systems (RAS) can produce high-value species with limited water exchange rate, thus reducing waste discharge and enhancing biosecurity. Biofloc (BF) systems are a form of RAS with algae, protozoans, bacteria, uneaten feed, feces and other organic matter in the water column. Some limiting factors to biofloc systems include abrupt changes in water quality, potential Vibrio sp. outbreaks, buildup of solids, and high energy costs attributable to robust aeration. Consumption of biofloc particles may enhance growth performance of the cultured species and reduce feed costs over time.