Effects of sand, sediment, vertical surfaces on intensive shrimp production
In intensive shrimp-culture systems, sand, sediment and other surface areas can have both positive and negative effects on shrimp production.
Nitrogen and phosphorus loads vary by system
Adding nitrogen and phosphorus to natural waters can cause eutrophication. Discharge of these nutrients from aquaculture operations is under U.S. government evaluation.
Biological lamella sedimentation
Sedimentation is a useful technique to manage aquaculture wastewater because a high proportion of suspended solids have a high sinking rate.
Water quality standards: Dissolved Oxygen
Dissolved oxygen concentration is perhaps the most important variable influencing the well-being of fish, shrimp and other aquatic life.
Sediment accumulation in earthen shrimp ponds
Shrimp aquaculture farm managers suspect pond bottom degradation and sediment accumulation as possible causes for production decreases.
Water recycling study evaluates changes in chemical characteristics
Research in Alabama evaluates changes in chemical characteristics of production pond water, soils and shrimp yields in response to water recycling.
Water quality standards: Biochemical oxygen demand
Biochemical oxygen demand is an index of the oxygen demand in wastewater, an important water quality variable used in effluent management.
Inland shrimp farming and the environment
Inland shrimp farming has been a common practice in some areas of Thailand for nearly a decade and interest in this activity is spreading.
Water quality standards: Total Ammonia Nitrogen
For seawater or brackish water aquaculture management, the salicylate method is best for total ammonia nitrogen analysis.
Effluent permits commonly required by governments
A major environmental concern related to shrimp aquaculture is the potential water pollution from the release of effluent into water bodies.
Water quality standards: Total phosphorus
Two nutrient elements, nitrogen and phosphorus, are responsible for eutrophication in most instances. Phosphorus is usually the key factor.
Sediment accumulation in channel catfish production ponds
We sampled pond bottom sediments from 45 commercial channel catfish ponds that were in production for 14 days to 21 years.
Low-salinity, inland shrimp culture in Brazil and Ecuador
Some producers take advantage of shrimp's ability to tolerate a broad range of salinity variations by rearing in low-salinity waters.
Aeration, mixing and sludge control in shrimp ponds
A benefit of aeration is the mixing of pond water. Similar to biotechnological reactors, microbial processes are more effective in mixed pond water.
Polyculture of tilapia and penaeid shrimp
Tilapia-shrimp polyculture may provide an opportunity to re-establish a profitable and more sustainable aquaculture system at these dormant facilities.
Reducing nitrogen waste: An integrated approach
In shrimp farming it is critical to ensure that residual nitrogen waste is minimized or eliminated prior to discharge into receiving waters.