Tag - EMS

Selection for disease resistance in Indian white shrimp

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The Indian white shrimp (Fenneropenaeus indicus) is an important species in the aquaculture industry of Egypt, and it has been negatively affected by various major diseases. Several selective breeding programs for farmed shrimp have succeeded elsewhere in improving disease resistance against specific pathogens, indicating that genetic improvement in resistance to several diseases is feasible. However, for optimal implementation of selection for improved disease resistance in a breeding program, it is critical to investigate if significant genetic correlations exist between disease [...]

9 May
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Shrimp farming sector looks for consensus on ways to battle trans-continental disease

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Governments, scientists and producers have expressed the need for a consensus on ways to fight a deadly disease that continues to seriously threaten the world’s shrimp farming sector. Outbreaks of acute hepatopancreatic necrosis disease (AHPND), commonly known as “early mortality syndrome” (EMS), caught the entire shrimp industry, scientists and governments by surprise as early as 2009 and continues to plague the sector. It is considered to be the most serious non-viral disease of cultured shrimp. A number of Asian and Latin [...]

7 May
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Nursery phase in shrimp farming: Benefits beyond EMS

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Beyond EMS and nursery systems The impact of the EMS/AHPND in Mexico has been severe. Production dropped 60% in 2013 which was very similar to that in Thailand. More problems than normal were attributed to post larvae sources. Some large groups took advantage of their large raceways infrastructure, and changed the production strategy by lowering stocking densities and prolonging the days of culture in the raceways for larger post larvae for stocking. The grow-out cycle in the ponds was further [...]

7 May
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Thailand: The History of Shrimp Farming and the Factors That Led to Its Growth

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Using traditional extensive techniques in large (30 hectares or more), low-lying coastal paddy fields, the first shrimp farms in Thailand were probably started during the 1930s.  Because of the dependence on natural tidal flow for wild seed and naturally occurring food organisms, yields were usually low (approximately 200 kilograms per hectare per year–kg/ha/yr). Semi-intensive shrimp farming in Thailand started during the early 1970s and was replaced by intensive shrimp farming beginning in 1987.  Penaeus monodon was the favored species because [...]

7 May
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A recovery path for the world shrimp market?

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An interesting aspect of aquaculture’s ongoing evolution is the role disease is playing in transforming the world shrimp market. The past three years have seen India, Vietnam, Indonesia and Ecuador take huge market share portions from China and Thailand – but not enough to offset the latter’s huge export fall-offs Barring any serious disease outbreaks, annual output and export growth are poised to rise by 7% and 10% respectively over the next two years Promising developments in the search for a solution [...]

6 May
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GOAL Shrimp Production Survey: Recovery Coming

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The Global Aquaculture Alliance’s GOAL 2015 survey of production trends in shrimp farming polled 38 respondents from Asia/Oceania, 31 from Latin America and two from Africa. Figure 1 summarizes the production estimates for global production during 2007-2017, which combine data from the United Nations Food and Agriculture Organization (FAO) and both 2014 and 2015 GOAL (Global Outlook for Aquaculture Leadership) surveys. Respondents in the 2014 survey reported substantial production declines during 2012-2013 in China, Thailand, Vietnam and Mexico as a [...]

6 May
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China Research – Disease Control in Shrimp Farming

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Abstract: This study investigated the knowledge, practices and challenges of tilapia and shrimp farmers (Penaeus vannamei) when preventing and controlling diseases through the use of antimicrobials and other compounds in Guangdong Province, China, which is the most important shrimp and tilapia production area in China.  Of the 30 shrimp farms surveyed, 19 experienced outbreaks of red body disease and five experienced whitespot syndrome, both viral diseases, and five experienced “secret death disease” [AHPND/EMS], which farmers controlled by application a [...]

6 May
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Dr. George Chamberlain on EHP

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According to Dr. George Chamberlain, President of the Global Aquaculture Alliance (GAA), Enterocytozoon hepatopenaei (EHP), the disease that has emerged as a major risk to shrimp farmers in Asia, is unlikely to impact farmed shrimp production on the scale that early mortality syndrome (EMS) did. Unlike EMS, EHP is caused by a spore.  This means that even though it spreads fast locally, it should be easier to contain it on a global scale, with the chance of it spreading to Latin America unlikely, said Chamberlain. He [...]

5 May
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CP Foods: EHP now a bigger risk for shrimp than EMS

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New measures to control the shrimp disease early mortality syndrome (EMS) which devastated Asian shrimp in recent years have been effective, an executive with Thailand’s Charoen Pokphand Foods said. However, another disease, the parasite enterocytozoon hepatopenaei (EHP) may poses a bigger risk currently, Robins McIntosh, a senior vice-president at the company said, during the Global Outlook on Aquaculture Leadership (GOAL) conference taking place from Oct. 26 to Oct. 29 in Vancouver, Canada. The biggest difference between the diseases is that EMS [...]

5 May
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Early Mortality Syndrome Outbreaks: A Microbial Management Issue in Shrimp Farming?

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A recent disease of farmed Penaeid shrimp, commonly referred to as “early mortality syndrome” (EMS) or more technically known as “acute hepatopancreatic necrosis disease” (AHPND), was first reported in southern China in 2010 and subsequently in Vietnam, Thailand, and Malaysia [1]. The EMS/AHPND disease typically affects shrimp postlarvae within 20–30 days after stocking and frequently causes up to 100% mortality. The Global Aquaculture Alliance [2] has estimated that losses to the Asian shrimp culture sector amount to USD 1 [...]

5 May
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