Tag - reservoir

A progressive approach to shrimp health management

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How water quality management, low stocking densities and the use of specialised feeds can consign the use of antibiotics in shrimp farming to history. The 400-hectare Sanolmedo shrimp farm in Ecuador ha been antibiotic-free since its inception over a year ago. The farm, located at the end of a long jungle road in Taura, is Corporación Lanec’s newest and most ambitious project to date and a select group of delegates from the nearby GOAL conference were able to visit this week to find out [...]

13 Nov
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A look at various intensive shrimp farming systems in Asia

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Commercial implementation of biofloc and RAS production systems help control shrimp farming diseases Intensive shrimp farm in Bali, Indonesia producing shrimp in a biofloc system (Taw and Setio, 2014). Before the mid-1990s, the major diseases affecting the farmed shrimp industry were of bacterial origin. But in Asia and from late 1994, the appearance of various,… See more at https://www.aquaculturealliance.org/advocate/intensive-shrimp-farming-asia/

9 May
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Problems in shrimp culture during the wet season

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Recently, many farmers have faced the problem of fluctuations in salinity and temperature causing shrimp diseases; particularly yellowhead, white spot and luminescent bacteria that generally cause farmers to lose their crops. They have also had problems with stunted growth or black gill. Many of these problems can be overcome. Most farmers generally prefer to stock shrimp in the wet season, as they believe there are fewer problems than in the dry or cold seasons. However, culture in the wet season [...]

5 May
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Escape from EMS/AHPND at SGIC

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How this is achieved is through management of culture systems, biosecurity, avoiding use of chlorine for pond and reservoir water disinfection and thorough clean-up of hatchery. Dr Boonsirm Withyachumnarnkul at Centex Shrimp, Mahidol University said that with widespread destruction of crops with early mortality syndrome (EMS) in vannamei shrimp farming, some farms in Thailand have returned to farming the black tiger shrimp in 2013. The Shrimp Genetic Improvement Center (SGIC), Surat Thani, Thailand has largely escaped being infected with the bacteria causing [...]

4 May
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Success story: unconventional farming practices

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As the early mortality syndrome (EMS) crisis continues to affect farms in Thailand, an increasing number of farmers are trying out specific solutions and have managed to prevent EMS from occurring in their ponds or farms. As we can gather in the media, some farmers adopt hyper concentrations of dissolved oxygen in the ponds whereas others opt for a nursery protocol and adopt best farming practices. About 10 years ago, l met a farmer who has a different on shrimp [...]

3 May
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Biofloc Technology: Possible Prevention For Shrimp Diseases

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Summary: Facing emerging viral problems and rising energy costs, the use of biofloc technology in biosecure systems offers an answer for sustainable shrimp aquaculture. The main attributes of biofloc systems in reducing disease risk include the fact that low water exchange improves pathogen exclusion. The aeration that keeps bioflocs suspended provides stable water quality. The diverse and stable microbial community stimulates shrimp immune systems and limits the development of opportunistic species. The suspended biofloc is also available as feed for shrimp. Highly areated biofloc shrimp culture ponds feature stable and sustainable [...]

2 May
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BMPs for prevention of WSD

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Pathogen exclusion or biosecurity is the only means of prevention of WSD at present. Disinfection of aquaculture facilities is a common disease management practice to ensure biosecurity. Methods for disinfection of aquaculture establishments have been outlined in OIE Aquatic Manual (2012). Following practice will help in ensuring biosecurity from WSSV. 1. Source water: Ideally farms must have reservoirs of adequate requirement of seawater for operation of aquaculture. Filter source water first through coarse screens to remove larger aquatic animals and debris and then pump into [...]

27 Apr
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Ensuring WSSV Free Sediment and Water for Prevention of White Spot Disease

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The white spot syndrome virus (WSSV), the causative agent of white spot disease (WSD) of shrimp is an extremely virulent and most important cause of economic loss to the aquaculture sector. WSSV is widespread in shrimp aquaculture ecosystems globally and is transmitted vertically from infected broodstock to larvae and horizontally by ingestion of infected organisms. While WSD transmission vertically is being prevented by screening out infected broodstock, its horizontal transmission in grow out farms is a serious challenge. At present there is [...]

27 Apr
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Advanced Pond Design – Brunei Project Develops Technology For Large Black Tiger Shrimp Production

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Summary: This article is the fifth in a series about a five-year project undertaken in Brunei Darussalam to develop advanced technology for production of large black tiger shrimp. It focuses on the development of advanced growout ponds and practices with enhanced systems for biosecurity, sludge removal, water reuse, energy efficiency, automatic feeding and mechanical harvesting. In testing pond water flow designs, a “carousel” approach with a central divider and both paddlewheel and Venturi aeration outperformed setups with counter-rotating cells in ponds.   The Brunei operation uses [...]

23 Apr
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Better management practices for shrimp farming – Part II

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31. Water is a scarce and very precious natural resource. Try to maximize the efficiency of water utilization. 32. Exchange the water carefully. Do not frequently exchange or in-take the water. 33. During the first month, there should not be any water exchange. Starting the second month, if necessary, water exchange can be done but try to minimize it as much as possible. 34. Release the water when the plankton bloom is too thick i.e., dark green or dark brown water. 35. When [...]

23 Apr
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