Sediment microbiology, management
Sedimentation increases organic matter concentration in pond bottom soil. Particles originating from mineral soil and organic matter that do not float or dissolve settle to the bottom.
Prevention, treatments clear muddy ponds
Water turbidity caused by suspended soil particles decreases productivity in culture ponds. Erosion control is the logical first step in correcting muddy ponds.
Overview of mechanical pond aeration
Mechanical pond aerators increase the rate at which oxygen from air enters water by providing a greater surface area to facilitate diffusion.
Integrated cage-cum-pond systems improve fish production with limited inputs
Integrated cage-cum-pond systems are high-value species are stocked in cages suspended in ponds with filter-feeding species stocked in open water.
Feeding affects pond water quality
Feeding allows much greater production of fish and shrimp, but nutrients in feed are not converted completely to fish or shrimp flesh.
PDP (pressure differential piping) aeration
For shrimp growers committed to using mechanical aeration and intensive culture densities, electrical power consumption is a major cost.
Vegetated strip evaluated for storm water effluent treatment in catfish pond
The authors integrated a vegetated filter strip into a commercial catfish pond to capture effluent as part of best management practices.
Probiotics’ enhancement of soil, water quality examined
Probiotics used as bottom soil and water quality enhancers are primarily cultures of living bacteria, enzyme preparations, or the two combined.
Seaweed polyculture: Potential bioremediation of hatchery effluents
Authors are developing a freshwater hatchery effluent bioremediation system that uses seaweed polyculture to decrease discharge levels and reduce remediation costs.
Floating skimmers improve water quality in tanks, ponds
In aquaculture, foam fractionation involves the use of a protein skimmer to remove dissolved organic compounds from aquaculture systems.
Solar energy technology for aquaculture
Researchers are evaluating whether off-the-shelf flat-plate solar collectors can maintain stable recirculating aquaculture system temperatures.
No-maintenance filtration for hatcheries
A properly designed fluidized-bed filtration system increases hatchery output by providing a chemically stable, high-quality water supply.
Alternatives for reef fishing
Because of the high prices paid for live reef fish, overfishing of species such as groupers and Napoleon wrasse is a common problem throughout their range.
Secchi disk visibility: Correct measurement, interpretation
It would be difficult to find a pond aquaculture worker who has not measured Secchi disk visibility or at least seen someone measure it.
Protein content of fish feed affects water quality
In pond culture, the application of formulated feed – some with very high protein content of 30-60 percent – constitutes the main nutrient input.
Coagulation and flocculation aids remove suspended solids, phosphorus from RAS effluents
Phosphorus is one of the most scrutinized nutrients discharged by aquaculture systems, due to its potential eutrifying impact on receiving bodies of water.