Tag - Enterocytozoon Hepatopenaei EHP

We can grow better shrimp and in better ways

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China is obviously the major world player, both pushing and pulling the market as a producer and importer, and the country needs massive imports from Ecuador and other suppliers to satisfy its huge internal demand. Thailand continues its strong recovery from EMS/AHPND, through the increased use of improved genetic lines, enhanced production techniques and to some extent the expansion of its domestic market. Ecuador appears on track to meet or exceed its impressive 2015 production. Aquaculture in general – and [...]

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Aquaculture Europe 2016: Shrimp Disease Causes Millions in Losses Across Asia

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ASIA – Shrimp diseases such as white spot and AHPND have caused devastating losses for farmers across Asia in the last few years. Speaking at Aquaculture Europe 2016, 20-23 September, in Edinburgh Scotland, Dr Andy Shinn, Fish Vet Group, attempts to work out the true economic losses to farmers. Asia’s crustacean aquaculture is expected to exceed 5.08 million tons in 2016, an increase of 5.46 per cent. However, although there has been an increase in production, the level of growth [...]

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India: Central Institute of Brackishwater Aquaculture Makes Shrimp Feed

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Researchers at the Central Institute of Brackishwater Aquaculture (CIBA) in Chennai, Tamil Nadu, have developed a new feed for India’s multi-billion dollar shrimp farming industry, which currently gets its feeds from foreign companies.  Branded as “Vannamei Plus”, the Indian-made feed is cheaper than the foreign feeds and produces just as much shrimp per hectare.  Three medium-scale feed mills have already been built to produce the new feed. CIBA director Dr. K.K. Vijayan said that feed represents 60 percent of production [...]

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Massachusetts – John Sackton on EHP

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At the Global Aquaculture Alliance’s GOAL shrimp session in Vancouver, British Columbia, Canada (October 2015), a panel of shrimp experts talked about the microsporidian Enterocytozoon hepatopenaei, a spore-forming fungal parasite, and how it might affect the global shrimp supply.  John Sackton, Editor and Publisher at Seafood.com (an online, subscription-based, fisheries news service) prepared the following report based on interviews with a number of the shrimp experts, who spoke on the condition that they would not be quoted by name. When [...]

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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 [...]

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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 [...]

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What do we know about EHP?

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• Tissue specific for HP unlike most other microsporidians which affect muscle • Transmitted orally between shrimp with no need for an intermediate vector very unusual and very worrisome • Very difficult to visualize with normal histology • Requires practice and patience • Once spores are in ponds very difficult to eradicate HP with EHP spores Control of EHP • Two fold approach to possible control – Broodstock carriers shed spores in feces which contaminate egg and nauplii surfaces. – Farmed animals shed spores into ponds which in [...]

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Professor Timothy Flegel on Shrimp Diseases in Asia

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On February 28, 2015, at the Thirteenth Meeting of the Asia Regional Advisory Group on Aquatic Animal Health, sponsored by Network of Aquaculture Centres in Asia-Pacific (NACA), Professor Timothy William Flegel presented a paper on shrimp diseases in Asia.  Following are excerpts from Flegel’s paper that appeared in the “new” Aquaculture Magazine: Whitespot syndrome virus (WSSV) and type-1 yellowhead virus (YHV-1) are still the most lethal viral pathogens for Penaeus monodon and P. vannamei, although yellowhead (YHV-1) has been confined to Thailand.  A [...]

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How to Manage the New Microsporidian Disease

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The March/April 2015 issue of The Global Aquaculture Advocate (“The Global Magazine for Farmed Seafood”) contains an excellent article by Dr. Stephen Newman on how to manage the new microsporidian disease caused by Enterocytozoon hepatopenaei (EHP), a parasite widely found in Asia and other areas that severely retards the growth of farmed shrimp. EHP infects the tubules in the shrimp’s hepatopancreas and damages the organ’s ability to gain nutrition from feed. Total elimination of EHP may not be possible. [...]

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Thailand – What are Microsporidians?

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If you’re a shrimp farmer and have not yet read the Network of Aquaculture Centres in Asia-Pacific’s (NACA) report on Enterocytozoon hepatopenaei (EHP), a disease caused by a microsporidian parasite (http://www.enaca.org/), I recommend that you read it before you read this item.  One farm manager told me that EHP might turn out to be more devastating than early mortality syndrome (EMS)!  The Thai shrimp farming industry’s slow recovery from EMS is probably associated with the presence of EHP. According to Wikipedia, microsporidia constitute [...]

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