Seaweed farming offers avenue toward greater food security
Seaweed farming has both proven history and huge potential. Large-scale farms could produce raw materials for biofuel, aquatic feeds and human consumption.
Sludge management at pangasius farm cuts discharges
In modifying its infrastructure and related pond management, QVD Aquaculture uses floating water plants to remove nitrogen and phosphorus from the discharge water. Sludge pens capture sludge at ponds for later reuse.
Organic matter for pond fertilizer
Animal manures, grasses and other organic matter have been widely used as fertilizers in aquaculture ponds. The fertilizers decompose and release nutrients that promote the growth of phytoplankton and enhance the base of the food web.
Hatchery production of spiny lobsters
Spiny lobsters are a premium seafood whose culture has depended on wild-caught seedstock. An Australian company is helping shift the farming paradigm to more sustainable hatchery production.
Feeding the world in 2050
To support projected food demands, production must rise an estimated 70 percent above current values. Aquaculture can play a key role in raising food in limited space for feeding a growing population.
Liming materials for aquaculture
Liming materials neutralize acidity and increase pH in pond bottom soil and water. They also react with carbon dioxide to form bicarbonate and release calcium and magnesium, increasing both alkalinity and hardness concentrations in water.
Reactions between pond bottom soil, water
Alkalinity and acidity in pond water and soil interact and can result in unhealthy culture conditions. Ion exchange occurs between soil and water until an equilibrium is reached.
Malaysia shrimp farm redesign successfully combines biosecurity, biofloc technology
Blue Archipelago’s re-engineering of a large shrimp farm to a modular, biosecure facility set a benchmark for future shrimp culture projects in Malaysia.
Load models support sustainable aquaculture planning for Brazil’s reservoirs
Cage aquaculture in hydroelectric reservoirs has great potential for expansion in Brazil, but there are concerns of negative environmental impacts. Careful climate zoning can assist proper siting.
Erosion, sedimentation in earthen aquaculture ponds
The control of external inputs of suspended soil particles to ponds and internal erosion of embankments and bottoms should begin at the design and construction stage.
C:N-controlled, periphyton system boosts production in stagnant ponds
The adoption of polyculture systems with controlled carbon:nitrogen ratios and substrates for periphyton development can improve utilization of the aquatic food webs in stagnant ponds.
Phosphates, pH management control algal blooms in barramundi ponds
Pond pH had a strong effect on the effectiveness of a product applied to remove excess phosphate to control algal blooms in eutrophic aquaculture ponds.
Bangladesh study examines potential for prawn cage farming
While Bangladesh's prawn industry is based on pond culture, a feasibility study was conducted to establish prawn cage culture to benefit resource-poor fishers and landless people.
Cage design, placement affect water quality
Farm cages should be sited where water quality is good and water velocity is adequate. The size, shape and position of cages should be selected to favor rapid flushing.
Clay flocculation counters microcystin pollution in China study
The most promising microcystin control in aquaculture is flocculation and sedimentation of harmful algal blooms with clay.
Varied aerator designs provide oxygenation, mixing in biofloc systems
Aerator designs and mixing are key components of biofloc production systems. Diffuser aerators work primarily in smaller systems by moving deeper waters to the surface and creating constant mixing.