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

Real-time PCR offers sensitivity, specificity in detecting AHPND plasmid

Real-time, quantitative polymerase chain reaction (qPCR) analysis has become an attractive alternative for quantification of the acute hepatopancreatic necrosis disease (AHPND) pathogen in infected shrimp. The authors developed a qPCR assay to quantify a virulence plasmid harbored by the bacterium that causes AHPND.


TAN, other water quality factors affect nitrification rates in biofilters

An important criterion when studying biofilters is the conversion rate of total ammonia nitrogen (TAN) to nitrate-nitrogen in production water. Although nitrification rates have been based on media surface areas, they do not always reflect the actual nitrification achieved. Volumetric 


Liposomes open new doors in larval fish nutrition

Liposomes, synthetic microparticles originally developed for the pharmaceutical industry, can be produced for ingestion by rotifers and artemia. A study found that yellowtail larvae fed rotifers enhanced with liposomes containing taurine had improved growth. 


Nutrition, food security take center stage

The Global Nutrition Report 2014 highlights that nutrition and food security is a concern in all countries, not just low-income ones. Urbanization and rising living standards are key drivers in the ongoing increases in seafood demand and fisheries development. 


Embodied resource use in feed-based aquaculture

In life cycle analysis of aquaculture, there is a danger of the entire array of embodied resources and impacts being assigned to the production facility. Producers have no control over the inefficiencies or impacts associated with feed production, but can 

Health & Welfare

Parasitism enhances tilapia susceptibility to Flavobacterium columnare

The bacterium Flavobacterium columnare and parasite Ichthyophthirius multifiliis (Ich) are common pathogens that can cause heavy economic losses for fish culture. The authors conducted a study to evaluate the susceptibility of hybrid tilapia to F. columnare, including fish mortality and 

Health & Welfare

Diets affect abalone meat quality, shell color

A preliminary study investigated the effects of diet on the meat quality and shell color of Pacific abalone. A test diet and a commercial abalone feed resulted in lower meat protein content compared to that achieved with a diet of 


Soybeans: Truly sustainable feed ingredient? Part 2

Although today’s soybeans offer many benefits, farmers can also plant alternatives, sometimes on the same farms that raise genetically modified beans. Organic beans meet specific market demands, and a conventionally bred non-GMO bean has been developed for use in aquafeeds 


Feed trays: The good, the bad, the ugly

Feed trays are typically used to avoid overfeeding in aquaculture production systems. They are sometimes used to deliver 100 percent of the feed that is fed, and other times a small number of trays are used as a guide to