Use of formic acid to control Vibriosis in shrimp aquaculture

: 7822

Abstract Luminous Vibriosis is a shrimp disease that causes major economic losses in shrimp industry as a result of massive shrimp kills due to bacterial infection caused by Vibrio species. Use of antibiotics to control Vibrio in shrimp aquaculture is not allowed in the United States and so it is necessary to develop an alternative pathogen control method for shrimp production. Short-chain fatty acids have been used as food preservatives for a long time. Organic acids are commonly added in feeds in animal production, [...]

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Bioavailability of crude protein and lipid from biofloc meals produced in an activated sludge system for white shrimp, Litopenaeus vannamei

: 5472

ABSTRACT The present study compared the bioavailability of crude protein and lipid from biofloc meals generated with an activated sludge system using two water sources: wastewater from shrimp experimental culture (BFL-W) and, artificially, using clean seawater (BFL-C). The sludge system operated by chemical and organic fertilization three times per week. Sampling of bioflocs occurred every two days during 81 days. To evaluate digestibility, each type of biofloc meal was incorporated into a reference diet (REF) at 300 g/kg. Another diet [...]

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How does rainfall affect shrimp pond water parameters?

: 13516

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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Calcium, Magnesium Use In Aquaculture

: 5764

Summary: Aquatic plants and animals get the essential nutrients calcium and magnesium from water and their food. Hardness is usually great enough to supply adequate calcium and magnesium in fertilized ponds, and in ponds with feeding, they are obtained from feed when hardness is low. Calcium ions affect the toxicity of trace metals to aquaculture species. Although of limited concern in ponds, calcium carbonate precipitation can be troublesome in hatcheries. In inland waters, magnesium concentrations can be increased by [...]

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Importance of Feed Enzymes for Shrimp and Fish in Sustainable Aquaculture

: 10297

Feeding enzymes to shrimps and fishes is one of the major nutritional advances in the aquaculture sector since last few years. Exogenous enzymes are now extensively used throughout the world as additives in animal diets. Also, supplementation with enzymes can help to eliminate the effects of antinutritional factors and improve the utilization of dietary energy and amino acids, resulting in improved performance of fish/shrimps (Farhangi and Carter, 2007; Lin et al., 2007; Soltan, 2009). The primary purpose of enzyme application [...]

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The oft-overlooked water quality parameter: pH

: 11025

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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High-density shrimp producer wins innovation award

: 8917

The Global Aquaculture Alliance (GAA) will recognize a farmed shrimp producer in Brazil as a leader in innovation. Camanor’s high-density, land-based facility recycles water for multiple production cycles while preventing environmental degradation and the use of chemicals or antibiotics. At GAA’s annual GOAL conference in Vancouver next week, Camanor Produtos Marinhos Ltda. Director Werner Jost will accept the Preferred Freezer Services Global Aquaculture Innovation & Leadership Award for AquaScience®, what he calls a “new concept in sustainable shrimp production” operating [...]

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Selection for disease resistance in Indian white shrimp

: 8209

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 [...]

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The use of acidifiers in fisheries and aquaculture

: 5569

In the field of aquaculture it is well established so far that the inclusion of antibiotics into the diets of fish (Ahmad and Matty, 1989) can promote growth and feed conversion. However recently, growing awareness from consumers and producers of aquaculture species has resulted in calls for responsible and sustainable aquaculture, also in the much debated shrimp production in South East Asia (Verbeeke, 2001; Feedinfo, 2005). Public opinion and regulation authorities in most export countries focus now on the misuse [...]

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Aquamimicry: A revolutionary concept for shrimp farming

: 12484

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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