Vaccination Enhances Early Immune Responses in White Shrimp Litopenaeus vannamei after Secondary Exposure to Vibrio alginolyticus

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Recent work suggested that the presence of specific memory or some form of adaptive immunity occurs in insects and shrimp. Hypervariable pattern recognition molecules, known as Down syndrome cell adhesion molecules, are able to mount specific recognition, and immune priming in invertebrates. In the present study, we attempted to understand the immune response pattern of white shrimp Litopenaeus vannamei which received primary (PE) and secondary exposure (SE) to Vibrio alginolyticus. Immune parameters and proliferation of haematopoietic tissues (HPTs) of shrimp which had received [...]

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India’s vannamei shrimp farming: Preparing for a better future

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The Society of Aquaculture Professionals (SAP) played a vital role in the introduction of Penaeus vannamei in India in 2009. “However, recently several issues are threatening the sustainability of this industry. SAP realised that it needs to intervene and bring these issues to the attention of key players in the industry in India as well as the authorities,” said president S Muthukaruppan. It organised a special session on November 8, 2014 in Chennai. SAP invited four speakers to give their views on [...]

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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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Thailand’s shrimp output seen recovering from disease woes in 2015

: 1980

BANGKOK – (Reuters) – Thailand’s shrimp output is expected to recover to between 250,000 tonnes and 300,000 tonnes in 2015, four years after the sector was hit by the disease of Early Mortality Syndrome (EMS), industry bodies said on Thursday. Thailand, once the world’s top shrimp exporter, has seen its share of the world market drop to 10 percent against 30 percent to 40 percent in 2012. “2014 should be the lowest in the industry,” Suraphol Pratuangtum, president of the Thai [...]

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Dietary supplements of aquatic animals

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An important key to culture of any fed species is the development of sustainable, cost-effective and nutritionally complete feeds, along with efficient feed management systems. Emerging technologies for improving the gut environment are being rigorously studied and are beginning to be applied in aquaculture feeds. Use of probiotics in feeds, although successful in human and animal nutrition, is not well accepted in aquaculture. Improved delivery methods and better understanding of gut microflora of aquatic animals could change this in the future (Balcázar et [...]

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Dietary Sodium Butyrate Improves Performance Of Pacific White Shrimp

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Summary: With the use of antibiotics increasingly limited, aquaculture has sought new feed additives to improve the nutrition and health of aquatic animals. Sodium butyrate has potential as an additive for marine shrimp diets, improving both the balance of intestinal bacterial flora and performance of the shrimp. In research using both clearwater and biofloc systems, shrimp that received diets supplemented with sodium butyrate had higher survival and productivity. Sodium butyrate also had an antimicrobial effect against three Vibrio strains. Bruno Corrêa da Silva, Empresa de Pesquisa [...]

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Applications of Probiotics in Aquaculture

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The need for sustainable aquaculture has promoted research into the use of probiotics on aquatic organisms. The initial interest was focused on their use as growth promoters and to improve the health of animals; however, new areas have been found, such as their effect on reproduction or stress tolerance, although this requires a more scientific development. 4.1. Growth Promoter Probiotics have been used in aquaculture to increase the growth of cultivated species, in reality it is not known whether these products increase the [...]

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Use of Probiotics in Aquaculture

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The growth of aquaculture as an industry has accelerated over the past decades; this has resulted in environmental damages and low productivity of various crops. The need for increased disease resistance, growth of aquatic organisms, and feed efficiency has brought about the use of probiotics in aquaculture practices. The first application of probiotics occurred in 1986, to test their ability to increase growth of hydrobionts (organisms that live in water). Later, probiotics were used to improve water quality and control of bacterial infections. Nowadays, there [...]

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Probiotics as Antiviral Agents in Shrimp Aquaculture

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Shrimp farming is an aquaculture business for the cultivation of marine shrimps or prawns for human consumption and is now considered as a major economic and food production sector as it is an increasingly important source of protein available for human consumption. Intensification of shrimp farming had led to the development of a number of diseases, which resulted in the excessive use of antimicrobial agents, which is finally responsible for many adverse effects. Currently, probiotics are chosen as the best alternatives [...]

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