WWF Research Finds Improved Environmental Performance is Good for Shrimp Aquaculture Business

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More intensive shrimp farming can yield better environmental and economic results, according to a new study conducted by World Wildlife Fund in Vietnam and Thailand. By producing more shrimp per hectare of land, farmers can increase production to meet growing demand for shrimp without increasing pressure on the region’s natural resources. “Natural resources like land, water, wild fish and energy come with a price tag,” said Aaron McNevin, Ph.D., director of aquaculture for WWF’s Markets and Food program, and lead [...]

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Importance of Feed Enzymes for Shrimp and Fish in Sustainable Aquaculture

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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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Thai shrimp’s improved survival rate will boost production

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Thailand’s change in shrimp production strategies over the years has paid off, and this year producers are expecting a 10-20 percent increase in production, said Siam Canadian General Manager Satasap Viriyanantawanit. “We used to use a high density, super intensive farming method and we had to use an excessively high volume of feed, which caused issues,” he told IntraFish. However, upon switching to lower density stocking for the shrimp ponds, the survival rate changed from 75 percent to 90 percent. “We now [...]

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Shrimp Behavior 101

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It’s midnight. Do you know where your shrimp are? Rod McNeil knows because he’s underwater watching them with lights! “Lying motionless and silent on the bottom, I watch their approach, and their reaction to me. When they spot me, all their antennae go up. I move toward them, the big shrimp on the leading edge of the troop take a head high posture and keeps an eye on me. I don’t move in any closer than a meter and a half. [...]

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Phytoplankton a crucial component of aquaculture pond ecosystems

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Proper management critical for successful production Blue-green algae will often float to the pond surface and form scums that absorb heat and can elevate water temperatures. Ponds typically contain an abundance of phytoplankton. These organisms play an important role in pond ecology and influence water quality. Although phytoplankton usually are beneficial, under some conditions, they can be quite problematic in fish and shrimp production. Phytoplanktonic algae consist of thousands of species distributed primarily among the phyla Pyrrophyta, Euglenophyta, Chlorophyta, Heterokontophyta and Cyanophyta. [...]

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Is It Time To Re-examine the Requirements for Shrimp Farm Certification? – Part 2

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Wild Fish Use Shrimp feeds usually contain between 15 and 20% fish meal. This makes it difficult for producers to achieve a fish in – fish out ratio of 1.0 or less. Because shrimp aquaculture consumes a large amount of fish meal – about 27% of total aquaculture use in 2006 (Tacon and Metain 2008) – reduction in fish meal use should be a major concern in certification. A great dilemma exists with respect to the amount of fish meal actually [...]

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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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GOAL Shrimp Production Survey: Recovery Coming

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The Global Aquaculture Alliance’s GOAL 2015 survey of production trends in shrimp farming polled 38 respondents from Asia/Oceania, 31 from Latin America and two from Africa. Figure 1 summarizes the production estimates for global production during 2007-2017, which combine data from the United Nations Food and Agriculture Organization (FAO) and both 2014 and 2015 GOAL (Global Outlook for Aquaculture Leadership) surveys. Respondents in the 2014 survey reported substantial production declines during 2012-2013 in China, Thailand, Vietnam and Mexico as a [...]

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Feed tray management lowers FCRs, shrimp production costs in Australia

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Black tiger trials with fewer daily feedings show improved conversion results. In lined, aerated ponds, Penaeus monodon fed four times daily had lower FCRs after one month of a culture cycle. In recent years, shrimp aquaculture costs have increased in every sector. Farmers need to find ways to reduce costs to maintain the profitability of the industry. Currently, one possibility for cost reduction is to manage feed consumption without affecting shrimp growth and total harvest. Growout production costs for raising black tiger [...]

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Estimating Biofilter Size For RAS Systems

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Summary: To size a biofilter for use in a recirculating aquaculture system, the primary concern is to provide enough biofilter capacity to control total ammonia-nitrogen (TAN) concentrations to a preset limit. Also critical is specifying the maximum feed rate for the system. The lower the TAN concentration going into a biofilter, the lower the volumetric TAN conversion rate for that filter will be. Sizing decisions are best based on previous experience with a given biofilter media in a specific [...]

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