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

EMS

Health & Welfare

PCR methods characterize AHPND V.p isolates

In analyzing the plasmid sequence from the whole genome sequences of AHPND V. parahaemolyticus (V.p) isolates, researchers identified a clear geographical variation within the plasmid, and developed PCR methods to characterize AHPND V.p isolates as either Mexico-type or Southeast Asia-type. 

Intelligence

GOAL Shrimp Production Survey: Recovery coming

The GOAL 2015 Shrimp Production Survey showed that global farmed shrimp production is rebounding from the decrease seen from 2011 to 2013 due to diseases, and is headed to an all-time high of around 4.8 million metric tons in 2017, 

Intelligence

GOAL video: James Anderson on shrimp trends

James Anderson delivered a data-rich survey on global shrimp and finfish production volumes for the Global Aquaculture Alliance at its GOAL conference in October. See the full video of his presentation. 

Aquafeeds

Natural feed additive improves shrimp productivity

The digestive systems of shrimp are main entry points for bacterial and viral pathogens, and unfavorable microflora. Natural feed additives that combine different actions have proven effective in improving survival where shrimp are exposed to bacterial pathogens. 

Health & Welfare

Limited decomposition enhances PCR detection of AHPND Vibrio in shrimp

A study confirmed the utility for improved polymerase chain reaction (PCR) detection of the Vibrio bacteria that cause acute hepatopancreatic necrosis disease (AHPND) in asymptomatic shrimp by permitting the shrimp to expire and decompose for several hours prior to preservation 

Health & Welfare

Genetic variation for resistance to WSS, AHPND in Pacific white shrimp

Selection for disease resistance has been used in breeding farm animals and can be a viable option to deal with white spot syndrome and acute hepatopancreatic necrosis disease in commercial shrimp culture. In trials, heritability for AHPND resistance was low, 

Health & Welfare

‘Big picture’ connects shrimp disease, inbreeding

Disease problems on shrimp farms may be partly driven by an interaction between management practices that cause inbreeding in small hatcheries and the amplification by inbreeding of susceptibility to disease and environmental stresses. 

Health & Welfare

Do current shrimp practices favor EMS?

After refilling ponds, surviving microorganisms – including Vibrio parahaemolyticus, which causes EMS in shrimp – may benefit from the availability of nutrients in sediment and water and lack of competing microorganisms.