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Brand AQ (Aqua Quality), carry the mission to improve the difficult situation the current of the shrimp aquaculture industry, and towards sustainable development.
Contact
0983 429 866
Monday - Saturday
Brand AQ (Aqua Quality), carry the mission to improve the difficult situation the current of the shrimp aquaculture industry, and towards sustainable development.
Contact
Monday - Saturday
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Choosing shrimp quality is the first step and is also one of the most important factors that decide the success or failure of the shrimp. A healthy, clean, disease not only helps in shrimp grow faster, increase productivity, but also help farmers save costs and reduce the damage caused by disease cause. So how to choose the shrimp breed standard? The same Aquatic AQ learn the important criteria when choosing shrimp through the article below.
Need to check the source of broodstock: Broodstock are fed and reproduction in maximum period of 4 months from when imported. Food source for shrimp broodstock to adequate nutrition from the foods fresh as the displaced, oysters, squid,... to ensure shrimp daughter (Nauplius) healthy.
Process of nurture: Since the shrimp lay to the stage of P12 (the size of 1.1 – 1.2 cm) usually takes from 22-25 days depending on ambient temperature. If problems occur in the process of care, this time can last longer. Prioritize the process and don't use antibiotics and chemicals in the prevention and treatment of disease.
Diet: Should pick these varieties are bred by the algae, fresh, live food such as rotifers, copepoda, artemia,... food for the larvae should be products from the reputed brands to guarantee quality.
The selection of shrimp depends on the type of feed and the specific requirements of the environment.
Farming improvements, shrimp, and shrimp interposed graft: Need to choose the shrimp are large in size, the ability to swim powerful or likely buried well to adapt to natural conditions and against the enemy.
With the adopted model, high-density ground pond or pond just cover tarpaulin shore: When conditions biosecurity low and the impact of climate change, need priority shrimp sourced from local time or the shrimp-like withstand environmental change. Shrimp should choose the type of disease resistance, depending on the season that choose varieties resistant to various diseases: the cold season should choose shrimp disease resistance WSSV, IHHNV; warm season, choose disease-resistant varieties intestinal and liver.
>>> Continue reading: White shrimp is opaque body: Causes and ways to overcome
Model super farming-intensive, cover tarpaulin and conditions biosecurity: Should select the shrimp without the disease and development speed quickly.
Depending on environmental conditions and weather can select the line cleaner shrimp disease or disease resistance. For shrimp, need to select disease-resistant varieties.
Methods sensory to evaluate the quality of seed shrimp is the simplest and most easy for farmers. For size shrimp, need to select the shrimp l. vannamei minimum PL12 (corresponding to the length from 9-11mm). Here are a number of standards and the basic steps of this method.
|
Indicators |
Shrimp varieties, good quality | Shrimp poor quality |
Assessment methods |
| Morphology | -The age of shrimp PL must be determined based on size, such, shrimp PL 10 must have length of more than 9mm.
– Shell shrimp need the ball and clean. – Shrimp must have the uniformity in size, with a percentage lower than 10%. |
– The size of the shrimp smaller than its age.
– Shrimp shell signs dirty adhesion of dirt. – Shrimp uneven, with a lot of different sizes in the same herd. |
– Check template shrimp PL right in the packaging.
– Drop template shrimp into a glass glass and observed with back light. – For samples shrimp into a small pelvis and conduct surveys to assess. |
| Color | Shrimp PL possessing the color fresh, evenly, with the ability to clearly display the liver and the intestinal tract. | Shrimp PL have non-uniform color, with the color white, the liver is yellow and the bowel empty. | Check out samples of shrimp PL right in packaging or through the glass or in plastic pots. |
| Intestinal | – Shrimp PL have intestinal wide, straight and steadily from top to bottom.
– Gut of the shrimp is full of food (can be observed in hatchery or after feeding in the tank net). |
– Intestinal shrimp PL small and uneven, paragraph to paragraph, was small.
– Intestinal contains no food (observed in hatchery or after feeding in the tank shrimp). |
Check out samples of shrimp PL right in the bag or through glass (observed through a glass, and will give the best results, especially when looking at bright contrast). |
| Liver pancreas | – Block the liver pancreas have dark brown or black (depending on the type of food), with uniform color.
– Block the liver pancreas large, clear, evenly and to focus neatly in the top of the chest of shrimp PL. |
– Color the liver may be white, pale yellow, or white opaque, but not evenly.
– Block the liver, small, heterogeneous and do not collect neatly in the top of the chest. |
Check out samples of shrimp PL can be made in or through glass (it is best observed reverse light through glass). |
| Activity | – Shrimp PL move fast and powerful according to the water flow backwards, clinging to the pots (after discharge cold).
– Shrimp PL quickly dispersed in how or when is drop into the pot (after discharge cold). – Shrimp PL response with sound (when tap on the pots). |
– Shrimp PL move slow, roll under the stream of water and often swirl in the middle basin.
– Shrimp PL often gathered to one place in the cover or in pots. – Shrimp PL no response when I knocked on the pots. |
Drop ever shrimp PL into the pot, then use your hands to stir the water in a circular manner to check the operation of the shrimp. |
| Shock salinity | After the shock salinity, shrimp PL remain healthy, and the mortality rate does not exceed 10%. | The mortality rate of shrimp PL rise after the shock salinity exceeds 10%. | Randomly select 100 shrimp PL, drop into freshwater (0‰) for 30 minutes, followed by transfer to water salinity 30‰ and hold for 10 minutes, then check the proportion of dead. |
| Other criteria | When stocked into ponds, shrimp PL quickly dispersed and often swim to the bottom. | When drop into the pond, shrimp PL swimming a lethargic, often near the shore without moving to the bottom. | Track immediately after the shrimp PL is drop down to the pond. |
Use microscope to evaluate the quality of seed shrimp step is Monday, very important in the accurate determination of the quality of the shrimp before stocking. This method requires preparation of a microscope, a small racket has a diameter of 30mm and straws to catch shrimp.
>>> See more: Alkalinity in pond cultured white leg shrimp imbalance, effective solutions
|
Indicators |
Shrimp varieties, good quality |
Shrimp poor quality |
| Morphology | – Age of shrimp PL corresponds to the size (PL 10 must be greater than 9mm).
– Shrimp shells should be shiny and not fouling. – Shrimp PL no defects such as legs, antennae, or curved body, and the ratio of text to below 1%. |
– Size shrimp smaller than the average in comparison with the old (Shorter than standard).
– Peel shrimp, dust, dirty, not clean, especially with fungi and protozoa. – Shrimp PL has many defects, with the rate of five high-rise. |
| Intestinal | – Intestinal shrimp PL has a large size, straight and homogeneous from top to bottom.
– Natural shrimp is filled full of food (Follow-up at the hatchery or after feeding in the aquarium). – Condition contractions of the intestine of shrimp PL going strong and evenly. |
– Intestinal shrimp PL small and uneven, with many passages were cut.
– Natural shrimp have no food inside (observed in hatchery or after feeding in the aquarium). – Natural shrimp PL contraction weakly and not regularly.. |
| Liver pancreas | – Liver pancreas contains many drops of oil, in amounts exceeding 30 drops. | – Block the liver, the pancreas does not contain drops of any oil or only a very few drops of oil. |
| Necrosis | – Shrimp PL is not necrosis | -Shrimp PL gangrenous some parts of the body. |
Assess the quality of shrimp by techniques of molecular biology – PCR and the method of counting bacteria is a process requiring skill, professional and modern equipment. Farmers can send samples shrimp to the center for aquatic pathology to be examined. The following are the criteria to consider when implementing this method.
|
STT |
Inspection criteria | Test method |
Qualitative/ quantitative |
|
1 |
MBV | Real time – PCR | Negative |
|
2 |
WSSV | Real time – PCR | Negative |
|
3 |
YHV | Real time – PCR | Negative |
|
4 |
HPV | PCR |
Negative |
|
5 |
TSV | Real time – PCR |
Negative |
| 6 | IHHNV | Real time – PCR |
Negative |
| 7 | IMNV | Real time – PCR |
Negative |
|
8 |
NHP | PCR |
Negative |
| 9 | AHPNS | Real time – PCR |
Negative |
|
10 |
EHP | Real time – PCR |
Negative |
|
11 |
Vibrio glow | TCBS agar |
Not infected |
Select the shrimp have clear origin from the unit reliable factor is top priority. Shrimp must ensure that there is sufficient certificates to check the health of broodstock and postlarvae. Shrimp has been tested and confirmed not infected with the disease often seen as white spots, IHV, whistles, with a number of other diseases. In addition, the production unit must include oxygen supply system, equipment, supplies and technical processes needed to ensure the most favorable environment for broodstock reproduction, aimed at the production of high quality seeds.
