The use of acidifiers in fisheries and aquaculture

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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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Dietary organic acids used as growth promoters anti-microbials

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Disease is a major limiting factor to aquaculture expansion and productivity. Of particular concern to tilapia aquaculture are bacterial diseases caused by the Streptococcal groups, such as Streptococcus agalactiae, which can cause widespread mortalities, particularly in warm water and high intensive culture systems in various countrieS. Antibiotics such as oxytetracycline (OTC) are still being used as the most common treatment and/or prophylactic against bacterial diseases, including Streptococcus, in many sectors of the aquaculture industry. However, as the global trend in antibiotic use becomes [...]

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Antimicrobials in Aquaculture – Research Opportunities

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The use of antibiotics and other compounds in aquaculture has been under scrutiny for several decades now, and is a common topic when the industry is subject to broad-brush criticism in the media. Antibiotic use has been widespread and indiscriminate for many decades, not only in aquaculture but in human populations and farmed animals throughout the planet. This has led to the development of antibiotic resistance in many pathogenic microorganisms. Once they arise, resistance genes can be transferred between bacterial [...]

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Hebrew U. researchers reach breakthrough on understanding how persistent bacteria are able to avoid antibiotics

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Prof. Nathalie BalabanProf. Nathalie BalabanDecember 29, 2013: The mechanism by which some bacteria are able to survive antibacterial treatment has been revealed for the first time by Hebrew University researchers. Their work could pave the way for new ways to control such bacteria. In addition to the known phenomenon by which some bacteria achieve resistance to antibiotics through mutation, there are other types of bacteria, known as “persistent bacteria”, which are not resistant to the antibiotics but simply continue to [...]

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Shrimp Advice More Proof Consumer Reports Should Avoid Seafood

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On April 28, 2015, Sean Murphy, online editor of SeafoodSource, a free, daily report on the seafood industry, posted a critique of Consumer Reports’ evaluation of shrimp to his webpage.  What follows is an almost verbatim copy of Murphy’s critique: Once again, the magazine that’s really good at deciding which flat-screen TV or tube of toothpaste is the best value for the money is trying to tell American consumers what they should not be eating, and once again they haven’t [...]

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Top ten ASEAN seafood stories from 2014

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1. Thailand’s shrimp industry hauled in huge losses in the past few years due to the Early Mortality Syndrome (EMS). Many believed 2014 would bring a recovery, but hopes were soon smashed as a long-lasting drought and a slower than-expected recuperation from the disease will see full-year production volumes settle at around 200,000 metric tons. This is a staggering fall from 2010, when production peaked at 610,000 metric tons. As if EMS wasn’t bad enough, Thailand’s seafood sector was rattled by a [...]

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FDA Is Cracking Down On Contaminated Shrimp Imports

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In 2014, the U.S. Food and Drug Administration (“FDA”) reported refusing 203 entry lines of imported shrimp for reasons related to veterinary drug residues.  The number of refusals was not only substantially higher than what FDA had refused in the prior three years, refusals increased in frequency as the year wore on.  In fact, in the second half of 2014 more than twice the number of shrimp import entry lines (139) were refused for reasons related to veterinary drug residues than [...]

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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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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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Mineral Extract Reduces EMS, White Spot Impacts In Pacific White Shrimp

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Summary: In the search for suitable alternatives to antibiotics and chemical therapeutics for disease treatment and prevention in shrimp, a promising control method is to strengthen non-specific defense mechanisms in crustaceans. The authors recently performed a study to evaluate immunity to white spot syndrome virus and virulent Vibrio parahaemolyticus in shrimp treated with a new mineral extract additive in pelletized feeds. Compared to control animals, shrimp fed the treated diets had significantly higher survival after challenge by injection with the pathogens.   Plastic tanks with 2-m diameters were [...]

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