News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

carbon

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Aquafeeds

What is the best carbon-nitrogen ratio for biofloc systems?

A recent study at the Federal University of Rio Grande in Brazil showed that it is possible to reduce the C:N ratio in biofloc cultures, to decrease the water volume used and the total suspended solids produced, with resulting savings. 

Responsibility

Inorganic fertilization of production ponds

Nitrogen and phosphorus are the most important nutrients in fertilization of both freshwater and coastal ponds. Many factors that can affect the response of ponds to fertilizers are location-specific. Aquaculture pond managers will have to figure out the best procedure 

Responsibility

Assessing the carbon footprint of aquaculture

A carbon footprint is an estimate of the total carbon emissions resulting from the production, use and disposal of a product or service. Carbon footprints for aquaculture products result mainly from the use of manufactured feed and mechanical aeration. 

Responsibility

Aquaculture ponds hold carbon

Although 16.6 million metric tons of carbon are annually buried in aquaculture ponds, estimated carbon emissions for culture species have approached several metric tons of carbon per metric ton of aquaculture product. 

Responsibility

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.