Showing posts from 2016

Biofloc technology

One of the inherent elements of characteristic aquatic ecosystems environments is the practically entire reusing of feed materials through the natural biological food web. Fish discharges are metabolized by microorganisms, reaped thus by planktonic creatures (potentially reused inside, e.g. algea control harvested gathered by zooplankton) and in the long run back to the fish. This element is still fundamental in broad culture lakes, however its part decreases as stocking thickness (pond escalation) is expanded.
Organic loads
The organic load in the more escalated pond is high, and an expansive portion of the organic matter settles onto the oxygen-restricted pond base, making anaerobic conditions, backing off the bio-reusing grouping and notwithstanding prompting to the generation of lethal mixes. What's more, the high feed load, stratification, and restricted oxygen supply will prompt to the restraint of nitrogenous waste digestion system, including the development of ammonium and n…

Diseases of Shrimp

Diseases of Shrimp

Shrimp aquaculture is the most important marine aquaculture industry. In spite of the hazardous development in world creation of developed shrimp, there have likewise been stunning, intermittent misfortunes because of ailments. Subsequently, sicknesses are currently considered as one of the basic constraining elements in the shrimp culture. Genuine viral ailment episodes of shrimp test the shrimp business to be better arranged in the perspective of an expanded learning about shrimps and their pathogens so that ailment counteractive action techniques could be moved forward. This requires moved attention to biosecurity, that is, conceivable strategies for developing shrimp in limited frameworks intended to keep the section of potential pathogens. The business likewise understood that a decent number of ailment episodes started from reckless transboundary development of tainted yet terribly typical aquaculture stocks.
Methods of Disease Control in Shrimp Aquaculture

At pr…

Pond Preparation and Management

Pond Preparation and Management

Prior to a Pond can be supplied for another product, the extreme squanders, which collect in the pond amid the past harvest, must be evacuated and the dirt and water molded. Developing of shrimp in a disgracefully arranged lake may prompt to trouble in lake administration amid the way of life period, which could bring about a lessening underway limit of the lake.
Pond Cleaning
The cleaning of a Pond or evacuation of the squanders, particularly the natural and phosphatic squanders that have amassed in the lake base could be, expert by drying, liming and furrowing. In any case, these strategies could in any case leave an unfriendly impact on the water and soil quality in the lake, which could bring about a decline in the generation limit of the lake.
There are two strategies for cleaning a lake as per the likelihood of the lake to be dried:
Dry Method
This strategy is utilized when the pond base can be dried totally. The Pond is depleted and left to dry …

Application of Probiotics in Shrimp Aquaculture

Application of Probiotics:

Probiotic action is interceded by an assortment of impacts that are subject to the probiotic itself, the measurement utilised, treatment length and course, and recurrence of conveyance. A few probiotics apply their valuable impacts by expounding antibacterial atoms, for example, bacteriocins that straightforwardly repress other microbes or infections, effectively taking an interest in the battle against diseases, while others restrain bacterial development over the gut divider (translocation), improve the mucous obstruction work by expanding the generation of inborn insusceptible particles, or regulate the provocative/resistant reaction. A few studies have shown that example acknowledgment receptors (PRPs, for example, toll-like receptors (TLRs) flagging pathways, insusceptible reactions, and the emission of antimicrobial peptides, for example, defensins and chemokines by the epithelium assume essential parts in these instruments.

Here are a few reports, whi…

Use of shrimp probiotics in farming

Immune system:
In relation to farmed shrimp, bacterial diseases are considered as the largest cause of mortality in larvae. The administration of a mixture of bacteria (Bacillus spp. and Vibrio spp.) positively influenced on survival and had protective effect against Vibrio harveyi and the white spot syndrome virus (WSSV).  This result was due to stimulation of the immune system, by increasing phagocytosis and antibacterial activity.
The administration of a commercial probiotic for the larvae of Marsupenaeus japonicus resulted in increased survival (97%) being significantly higher than the control treatment. Thus, the use of Bacillus coagulans SC8168 as probiotic for postlarvae of Litopenaeus vannamei resulted in higher survival of animals .

In a study with tiger shrimp (Penaeus monodon), the inoculation of Bacillus S11, a saprophyte strain, resulted in higher survival of post larvae challenged by a luminescent pathogenic bacterial culture. Bacillus subtilis and Lactobacillus plantaru…

Shrimp Disease control - Aquatic Animal Disease Report

1. White Spot Disease (WSD)

Pathogen: White spot syndrome virus (WSSV)
Species affected:Penaeus monodonandLitopenaeus vannamei(10-85 DOC)
Mortality rate: average to high, 100% in some cases within 10 d.
Clinical signs: lethargic or moribund shrimps aggregated at pond surface and edges, slow to erratic swimming behavior, overall body color often reddish, minute to large (0.5-2.0 mm diameter) white inclusions embedded in the cuticle;
Control measures: early harvest, strict isolation of infected ponds from movement, strengthened control of transportation, disinfection of infected ponds using Calcium hypochlorite (chlorine).
2. Yellowhead Disease (YHD)

Pathogen: Yellowhead virus (YHV)
Species affected:Litopenaeus vannamei
Mortality rate: could reach 100% in 2-5 days after infection.
Clinical signs: Affected shrimps showed sudden increase in feeding activity and abnormal growth, then loss of appetite; aggregated near the pond surface or at the edge of the ponds followed by mortalities. Body is disco…

BIOCLEAN - A Vinnbio Products (Eco Balancer / Control Ammonia)

It is a formulation of beneficial pond bacteria, which has been used in aquaculture ponds. They function well in fresh, brackish or salt water. The beneficial microbes in BioClean have been selected for their ability to biodegrade complex organic compounds like proteins, fats, oils, cellulose and starch.
These heterotrophic bacteria are generally considered to be organic sludge degraders.They are mostly from the genera Bacillus and are facultative anaerobes, meaning they can function with or without oxygen.
Each gram of BioClean contains more than three billions of bacteria belong to different species and strains. They carry out the hydrolysis of the complex organic molecules continuously and keep  the pond water free from sludge accumulation and ammonia toxicity.Therefore, it is imperative to maintain the C:N:P ratio, mechanical aeration ,Heterotrophs in BioClean use organic carbon for cell tissue formation.As a result, the rate of nitrification is controlled by oxidation of CBOD during…


Many factors must be considered when a farmer is deciding which species of shrimp he should culture. Due to its large size and high price, Penaeus monodon and P. indicus are generally considered for farming. It has also been seen that both these species are suitable for farming in Kerala's environment. Apart from these candidate species other commercially important species such as Metapenaeus ensisM. monocerosM. brevicornisPenaeus semisulcatus and P. merguiensis are also potential species that can be grown in India. Another potential candidate species that is flooding international market is the White leg shrimp, Penaeus vannamei.Although the Government of India has not yet given sanctions to culture it in the country, many Asian countries have already started to culture this species.
Advantages of P. monodon It attains a large size. Shrimp with a size of 10 to 12 pieces/kg are common, and sizes of 5 to 7 pieces/kg have been grown in ponds.It is the fastest growing o…