How does rainfall affect shrimp pond water parameters?

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Problems in shrimp farming usually occur during severe drought or heavy rainfall. Observations confim major losses occur mainly during periods of rainfall. In the last two years, we have had droughts brought about by El Niño. The US Climate Prediction Center and the International Research Institute for Climate and Society have issued an announcement that there is a 60% chance of La Niña developing in the last quarter of 2016. In contrast to El Niño, with La Niña we will [...]

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The oft-overlooked water quality parameter: pH

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Farmers are aware of the importance of monitoring levels of dissolved oxygen in their production systems and of providing supplemental aeration in intensive fish and shrimp ponds. However, other water quality parameters – as simple as they may look – are often overlooked. One such parameter is pH, which in chemistry refers to a numeric scale used to specify the acid or alkaline condition of an aqueous solutions. In a practical sense, water pH may range from 0 to 14 [...]

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Aquamimicry: A revolutionary concept for shrimp farming

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View of a grow-out shrimp pond implementing the Aquamimicry production approach. Technology has been met with success worldwide by balancing natural plankton. The prevalence of numerous diseases that affect the shrimp and prawn aquaculture industry has promoted the development of various health management strategies. Some include greater biosecurity and sourcing of specific pathogen free animals, and in more extreme cases, using chemicals and antibiotics. However, because of the nature of open pond aquaculture, where most farmed shrimp is produced globally, it is [...]

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What Happens in Shrimp Ponds During Heavy Rains?

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• Water temperatures, oxygen, pH, alkalinity and salinity drop. • Phytoplankton crashes occur. • Organic material accumulates on pond bottoms. • Strong winds stir up the bottom sludge. • Toxic levels of hydrogen sulfide (H2S) are released. • Pathogenic bacteria replace beneficial bacteria. • The noise of rain pounding on the surface stresses the shrimp. • Shrimp molt because of the lower pH and phytoplankton changes. Outcomes: • Mortalities occur because of the changes in water quality, stress and pathogens. • Feed consumption drops. • Shrimp migrate to the bottom [...]

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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 [...]

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Water Quality Parameter Analysis for the Feasibility of Shrimp Culture

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Muhammad Kasnir et al, Indonesia Moeslim University, Indonesia, carried out physicochemical studies to assess water resource in Mangara Bombang District, South Sulawesi in relation to their potential for shrimp aquaculture use. Introduction Tiger shrimp production in South Sulawesi amounted to about 12599.50 tons in 2007. Nationally, its production was at the fourth ranking after Riau Islands, North Sumatra and West Java [1]. The tiger shrimp production number was the aggregates production in several Regencies which have the coastal area in South Sulawesi Province. One of them is [...]

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“Black spot” on shrimp

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Regulations prohibit the use of many chemicals and antibiotics in U.S. shrimp aquaculture. The FDA in Silver Spring, MD publishes a list of drugs approved for aquaculture, USFDA URL: http://www.fda.gov/AnimalVeterinary/DevelopmentApprovalProcess/Aquaculture/ucm132954.htm. The main commercial operations in the U.S. claim that they use chemicals and antibiotics responsibly and only when necessary. Although unsubstantiated, this claim is reinforced by limited or no disease occurrences in recent history in the U.S., negating the need for chemical use. Agricultural lime is used to control algal blooms [...]

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Early Mortality Syndrome: Changing the Way We Farm

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Early Mortality Syndrome (EMS) has wreaked devastation across Asian shrimp farms over the past few years but now key research by Dr George Chamberlin, Global Aquaculture Alliance, and Dr Donald Lightner, University of Arizona, among others, is helping farmers adapt to living with and preventing EMS, writes Lucy Towers, The FishSite Editor. EMS is a bacterial disease of shrimp, characterised by an empty stomach, pale hepatopancreas and an empty midgut, which rapidly results in mass mortalities. The mass mortality caused by [...]

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Atmospheric Pollution Affects Water Quality

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Summary: Human activities have altered the concentrations of gases and other compounds in the atmosphere. Acid rain typically does not heavily affect aquaculture operations, and application of agricultural limestone can buffer water against the impacts of acid rain at facilities that use stream water. Due to higher carbon dioxide concentrations in the atmosphere, the amount of carbon dioxide that will dissolve in ocean water has increased. Decreased pH can thin the shells of some molluscan shellfish and reduce survival. Claude [...]

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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 [...]

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