Shrimp production systems with low/no water exchange
Research in a culture system without water exchange indicated that biological performance of postlarvae was similar.
Cage-cum-pond: Integrated aquaculture systems recycle wastes
Integrated aquaculture systems comprise large fish cultured intensively in cages and small fish cultured semi-intensively in the surrounding pond water.
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.
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.
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.