Effects of carbohydrate sources on a biofloc shrimp nursery
In an evaluation of carbohydrate sources, corn starch performed better than molasses in promoting the growth of L. vannamei in a biofloc nursery.
Seaweed mariculture provides feed, green energy production, bioremediation
Under cultivation, macroalgae grow rapidly and synthesize large amounts of carbon/energy reserves while utilizing wastewater. Seaweed can remove pollutants from industrial agriculture effluent and reduce coastal eutrophication.
Decomposition of organic matter in aquaculture systems
In his latest article, Professor Boyd discusses various aspects of the origin and decomposition of organic matter in various aquaculture systems.
Carbon-nitrogen ratio management
Carbon-nitrogen (C:N) ratio is an important variable related to soil fertility. Intensive ponds have lower C:N ratios, while higher ratios are found in extensive ponds and those constructed in organic soil.
What causes alkalinity changes in aquaculture waters?
Total alkalinity is an important variable in water for aquaculture systems, and its concentration frequently fluctuates over time in many culture systems.
Water quality in tilapia transport, from farm to retail
When producers and markets are separated by long distances, economic losses can occur. In a review involving tilapia, water quality was adequate in hauling trucks, although pH levels dropped during transport.
Salmon farmer says aeration compressor system helped cut its carbon emissions
Cermaq Canada cut more than 76,000 kg of carbon dioxide emissions using a new aeration technology provided by Poseidon Ocean Systems.
Decomposition and accumulation of organic matter in ponds
Aquaculture ponds accumulate organic matter from organic fertilizer, remains of microorganisms produced within the pond, feces of the culture animals and uneaten feed. Claude E. Boyd, Ph.D., details the leading organic matter management practices, and says that the accumulation of organic matter is often not as great as believed.
Recirculating aquaculture technology, part 2
To start a biofilter together with a source of nitrifying bacteria, you must provide the conditions that will encourage the growth of the bacteria. The basic process requires initial preparation of water chemistry, adjustment of alkalinity to support bacterial growth and the addition of ammonia.
Oxygen demand of aquaculture feed
The oxygen demand of feed represents the dissolved oxygen removed by the respiration of culture animals, microbial decomposition of uneaten feed and feces, and oxidation of ammonia nitrogen by nitrifying bacteria.
Hidden value of feed: Water quality
The intrinsic values of better feeds directly affect shrimp growth and performance in a positive way, but because better feeds produce less waste materials in culture systems, they also result in improved water quality that indirectly improves shrimp performance.
Killing methods, post-slaughter quality, part 2
All methods of slaughter have issues related to animal welfare. However, approaches such as death in air or bleeding without stunning have been particularly cited as unacceptable.
Microalgae production technologies for hatcheries
Microalgae – an important live feed in shrimp and fish hatcheries – can be produced in both open and closed systems, with the latter having some advantages.
Ocean Rainforest foresees a bright future for ocean plants, and not just in Asia
Faroe Islands company believes nutritious and fast-growing seaweed is a versatile raw material and the oceans’ best defense against climate change.
The blue dimensions of aquaculture
Authors review global aquaculture production, including development, farming systems, environmental concerns and further growth potential.
Microbial flocs for aquaculture
Microbial flocs consist of a variety of bacteria, fungi, microalgae and other organisms suspended with detritus in culture water.
TNC evaluation confirms offshore aquaculture company’s low carbon footprint
The Nature Conservancy assessment confirms the low carbon footprint and ocean-floor impact of offshore aquaculture company Forever Oceans.
Can kelp farming fix the planet? Experts weigh in on promises and pitfalls
How can kelp farming help solve global challenges? A panel of seaweed experts discussed promises, pitfalls and knowledge gaps.