Zero-exchange biofloc systems allow elevated stocking densities and production, but also require more dissolved oxygen and thorough water circulation. A new type of air injector uses only a centrifugal pump to recirculate water while naturally aspirating ambient air.
The authors conducted studies to test the performance of young shrimp postlarvae in systems with different approaches to aeration and water handling. Proactive management through proper feed applications and water quality control were critical elements.
In trials raising larger juvenile shrimp than those used previously in indoor super-intensive recirculating raceway systems, the positive effects from increased stocking size, growth rate and survival resulted in a reduced crop duration time.
In ongoing trials of greenhouse-enclosed intensive biofloc shrimp culture systems, the objectives of a 2012 study were to evaluate the performance of fast-growth shrimp fed a commercial diet formulated for high-density culture systems, and to further evaluate injector performance in