Tilapia culture systems in Bangladesh
Tilapia culture systems in Bangladesh play a “silent” role in meeting poor peoples’ needs and, increasingly, of a growing demand in formal markets.
Small-scale freshwater prawn culture boosts Bangladesh economy, household incomes
Bangladesh may be a small player in terms of global shrimp production, but producing and exporting shrimp provides an important source of foreign exchange.
Robotic vehicle applications in aquaculture
Small autonomous vehicles provide an environmentally friendly approach to labor-intensive methods used to maintain production and water quality.
U.S. study finds turbidity useful In TSS, ISS estimates
Total suspended solids concentration is time-consuming to measure, but turbidity has been used to estimate TSS concentrations in some types of effluents.
Mineral salts correct ionic imbalances in culture water
Since the application of mineral salts to correct ionic imbalances has improved survival and production, the practice is becoming increasingly common.
Lightweight oyster reefs reduce coastal erosion
A technique to stimulate oyster growth in the form of an oyster reef breakwater is being developed at Louisiana State University in Baton Rouge.
Dissolved gas conditioning for mine water utilization
Pure oxygen transfer columns and vacuum degassing columns can be used to drive dissolved nitrogen gas concentrations down to sub-saturation levels.
Process control, monitoring options in intensive recirculation systems
Intensive recirculation systems have potential for increased production per unit volume of water, but an increased risk of equipment failures.
Microbead media offers low cost, efficiency in RAS biofilters
Grow-out studies of summer flounder at the University of North Carolina Wilmington evaluated microbead media as a biofilter in recirculating systems.
Membrane filtration: Emerging technology removes fine solids from recirculating systems
While membrane filtration is not a cost-effective alternative to coarse solids removal processes, it has potential niche applications.
Chemical fertilizers in pond aquaculture
Chemical fertilizers are frequently used in pond aquaculture to stimulate phytoplankton productivity and enhance the availability of natural food organisms.
Polyculture extends production life for ponds with acid sulfate soil
Acidification due to excavation and aeration of acid sulfate soil causes recurrent production losses and low yields in brackish water aquaculture.
Managing algae in pond aquaculture
Negative impacts from uncontrolled populations of phytoplankton can provide a major production challenge in pond aquaculture systems used for catfish.
Organic matter in pond bottom sediment
Organic matter – including fertilizers, unconsumed feed and feces of culture animals – settles to pond bottoms, often with a negative impact on water quality.
EPA drafts effluent guidelines for U.S. aquaculture
The United States Environmental Protection Agency published draft aquaculture effluent guidelines in the Federal Register.
Integrated fish-seaweed culture systems
The use of integrated mariculture systems incorporating seaweed biofilters addresses the impact of discharges, promoting more sustainable production.