Seaweed aquaculture provides diversified products, key ecosystem functions, part 2
Seaweed remains a relatively untapped resource with potential as edible food, feed ingredients, cosmetics, agrichemicals, biomaterials and bioenergy molecules.
Water use at integrated aquaculture-agriculture farms
Fish farming in Egypt is not formally recognized as an agricultural activity, so aquaculture cannot use water from irrigation canals. However, fish are raised as primary or secondary crops in combination with fruit and other plant crops.
Seaweed aquaculture provides diversified products, key ecosystem functions, part 1
Seaweed plays key roles in Earth processes as a primary producer and link in the food webs of coastal and estuarine ecosystems.
Biofloc technology options for aquaculture
Biofloc technology offers advantages for the sustainable culture of shrimp and some species of fish.
The Fishery: One farm, one fish at a time
The Fishery is an inland farm in California that raises largemouth bass, carp, sturgeon and catfish in a recirculating system that minimizes water use.
COEXIST project addresses uses, interactions in Europe’s coastal waters
Throughout Europe, debate is taking place as to whether new fish farms, wind farms, tourist facilities or marine and/or coastal protected areas should be established. Competition for space is increasing. In the COEXIST project, partners from 10 European countries are exploring these developments, aiming to increase synergies and reduce conflicts, particularly with regard to the fields of aquaculture and fisheries.
‘Cash-SIS’ culture yields money crop, family food
In a study of pond polyculture, manipulation of species composition improved fish yield and corresponding income. Selling the whole production increased income 27 percent.
Compensatory gains yield hidden profits
Compensatory gain is defined as faster than normal growth following a period of slower than normal growth, caused by nutritional and environmental factors.
Evaporation affected by sunlight, temperature, wind
Evaporation of water from ponds is influenced by solar radiation, air and water temperature, and wind velocity. Control of aquatic plants can yield some reduction.
Sequencing batch reactors effectively treat shrimp aquaculture wastewater
One simple method of treating high-nitrogen wastewater in shrimp aquaculture is the use of sequencing batch reactors, which are simple in design.
Settling basin design, operation
To design a settling basin, know the size distribution of particles, estimated rate of inflow and determination of the smallest particle size to be removed.
Polychaete-assisted sand filters show potential in treating effluents
A practical way to treat mariculture effluents combines the physical attributes of a sand filter and the biological properties of hungry marine sand worms.
Integrated marine aquaculture-agriculture: Sea farming out of the sea
Aquaponic systems are robust, management is not difficult, and the synergies between fish and plants make vegetable production more profitable than aquaculture alone. The lion’s share of marine agriculture involves salt-tolerant halophytic plants used as food or feed, or in energy production.
Assessing groundwater quality in aquaculture
Those interested in using groundwater for aquaculture should perform a thorough chemical analysis of the water. Several problems related to groundwater use in hatcheries and holding or transport vessels can be alleviated by degassing or aeration.
The Shrimp Book: Shrimp pond soil and water quality management
Proper site selection, consideration of soil properties and careful earthwork construction at shrimp farms are essential. Prevention of erosion protects farm infrastructure and reduces sediment accumulation in ponds.
Avoid water chiller errors
Common factors that affect water chiller performance are inadequate water flow, inadequate heat recovery, inappropriate compressors and imbalances among compressor, condenser, evaporator and thermal expansion valves.