Tag - whitespot WSSV

Probiotics in Shrimp Aquaculture

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Shrimp ranks as the most favorite seafood among US consumers, and more than half of the shrimp in the market are coming from aquaculture. After decades of impressive growth, global shrimp aquaculture production in 2012 reached 3.78 million tons. However, catastrophic disease outbreaks have hindered the growing pace of the shrimp industry from time to time and caused tremendous economic loss, in billions of USD$ collectively. The most recent disease problem was the outbreak of the Early Mortality Syndrome (EMS) [...]

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Double-stranded RNA against WSSV genes provides antiviral protection in shrimp

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Researchers explore solutions to major shrimp disease. At the end of the experiments, most of the animals treated with dsRNA against WSSV genes survived and had low rates of WSSV infection. At the end of the experiments, most of the animals treated with dsRNA against WSSV genes survived and had low rates of WSSV infection. The white spot syndrome virus (WSSV) has caused major economic losses to shrimp farmers worldwide since the 1990s. Various field treatments and strategies for controlling WSSV have [...]

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Asia: Research – Review of Shrimp Diseases

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Abstract: This review summarizes recent information about new and newly emerging diseases of cultured shrimp in Asia and discusses the biosecurity lapses that led to the current shrimp production crisis.  All industry stakeholders must be aware of this situation and of the need for regional and global collaborative efforts to stem this crisis and prevent future development of another. In Asia, several shrimp diseases are new or newly emerged, including acute hepatopancreatic necrosis disease (AHPND), hepatopancreatic microsporidiosis (HPM), hepatopancreatic haplosporidiosis [...]

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Genetic Variation For Resistance To WSS, AHPND In Pacific White Shrimp

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Summary: 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. The approach is worthwhile when there are no other cost-effective control measures, and there are genetic differences for resistance to pathogens. In trials, heritability for AHPND resistance was low, while that for WSS was moderate. This indicated advancing genetic resistance is feasible, although progress with AHPND [...]

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India – Shrimp Feed Industry

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After the introduction of Penaeus vannamei, the shrimp feed business in the country underwent a great change.  New companies entered the feed business and existing feed companies expanded. Now India has nearly 25 aquafeed companies.  The total production of aquafeeds in 2014 was estimated at 1.25 million metric tons of fish and shrimp feed.  Shrimp feed production was approximately 600,000 tons, and fish feed production was 650,000 tons.  If all the smaller feed mills were included in this survey, the total [...]

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India Harvests Curtailed by Mortalities

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Diseases—whitespot and white muscle disease—and high temperatures are limiting the harvest of shrimp (Penaeus vannamei) in Andhra Pradesh, the heart of the shrimp farming industry in India.  On May 4, 2015, farm-gate prices for whole, white shrimp (Penaeus vannamei) were steady for 30, 40 and 50 count animals at $6.74, $5.49 and $4.70, respectively.  Prices on all sizes fell in April 2015. In Tamil Nadu, India’s second-largest shrimp farming region after Andhra Pradesh, whitespot has “wiped out” some farms, according [...]

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Global shrimp prices up as supply crunch on the anvil

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Shrimp prices have been rising in January in response to a global supply crunch with production in Canada and Greenland, major producing countries, on the decline. Trading prices for 150/250 count shrimp have also risen 6.5 per cent last week to $7.20 a pound, a five-year-high. Since the start of January, prices for cold water shrimp are up 7.5 per cent or $ .50 per pound. This sharp rise is due to the expectation of a serious shortfall in production. Farmers in Vietnam are now [...]

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India, Tamil Nadu – Big Problems

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Durai Balasubramanian, secretary of the Pattukottai Shrimp Farmers Association (4,000 members) in the state of Tamil Nadu, reports: There are many reports about the dramatic expansion of shrimp farming in India, but the truth is that farmers in the state of Tamil Nadu have big problems. • In the last year, feed costs have risen 23%, from $1.00 a kilo to $1.31 per kilo. • Over the past two years, seedstock costs have risen 60%. • Farmers have survivals of 80% for the first [...]

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Ecuador thrives with low-density, sustainable shrimp farming model

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White spot devastated Ecuador’s shrimp farming industry more than a decade ago, and recovery has been slow. But today the country’s farmers have found a new formula for success — and it seems to be working. The lowest density shrimp producer in the world Ecuador has, for several years, been taking advantage of its sustainable credentials in the wake of Early Mortality Syndrome’s to sweep of its competitors. The big hole in the shrimp market led the country to increase production by nearly 30 [...]

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Aquatic Animal Disease Report

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1. White Spot Disease (WSD) Pathogen: White spot syndrome virus (WSSV) Species affected: Penaeus monodon and Litopenaeus vannamei (10-85 DOC) Name of affected area: reported in 18 provinces (total area 7,279 ha) including Hai Phong, Quang Ninh, Nghe An, Ha Tinh, Quang Tri, Quang Binh, Quang Ngai, Thua Tien Hue, Phu Yen, Binh Dinh, Ho Chi Minh, Long An, Tien Gang, Ben Tre, Tra Vinh, Soc Trang, Bac Lieu and Ca Mau. Mortality rate: average to high, 100% in some cases within 10 d. Clinical signs: lethargic or moribund shrimps aggregated [...]

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