South American white shrimp farming methods

South American white shrimp belongs to the arthropod phylum, crustaceans, decapods, swimming suborder, native to the waters of the Pacific coast of South America, is recognized as one of the world's three excellent shrimp species. The shrimp reproduction cycle is long, fast growth, disease resistance, meat flavor, is currently the best-selling products in the aquatic market, broad prospects. The following is organized by me for you on the South American white shrimp farming methods, I hope you like it!

South American white shrimp farming techniques

First, stocking high-quality shrimp seedlings is to improve the survival rate of shrimp farming and an important guarantee of high yield. In the purchase of seedlings, to choose robust and lively, long and slender body segments, uniform size, clean body surface, muscle, intestinal full, responsive to external stimuli, swimming in an obvious direction, body transparency, the whole body without foci of disease shrimp seedlings, if possible, should be virus detection, to ensure that the virus does not carry. At the same time, auxiliary anti-water test method to identify high-quality shrimp fry.

Secondly, the timely release of seedlings, the use of ponds scattered progressive desalination standardized coarse technology. In each of the breeding ponds set aside 3% to 5% of the small water area closed with plastic film, and deployed into 3?~4?low salinity water, into the shrimp seedling desalination, desalination density of 1,200 to 1,500 tails per square meter, through the gradual dilution of nearly half a month or so desalination standard rough breeding, shrimp seedlings grow to about 2 cm, gradually into the pond, breeding, pond breeding density of about 70,000 tails / mu.

Third, the regulation of water quality, first of all, to control the water color, aquaculture of South American white shrimp ideal water color is formed by green algae or diatoms yellow-green or yellow-brown, in the breeding process to consciously regulate to achieve this ideal water color. Such as thin water ponds early application of organic fertilizer, fertilizer depending on the amount of pond water transparency, pH, water color and other flexible grasp, once a week fertilizer. Breeding due to residual bait and shrimp excreta increased, resulting in darker water color, you can take the appropriate amount of water or apply a certain amount of lime to control the water color. At the same time in the shrimp pond application of micro-ecological agents, such as photosynthetic bacteria, EM bioactive bacteria, water can be cool, etc., can be timely degradation of organic matter into the water column, such as residual bait, reduce oxygen consumption, stabilize the pond water color. Next is the regulation of pond water pH and dissolved oxygen, South American white shrimp suitable pH value of 7.8 to 8.5, can be adjusted by regular lime. Through the opening of the oxygenator to regulate the amount of dissolved oxygen, to ensure that the pool water dissolved oxygen in at 5 mg / liter or more, the bottom of the pond dissolved oxygen in more than 3 ml / liter.

Fourth, scientific baiting. Production, general feeding of South American white shrimp full-price compound, baiting according to the size of the shrimp, survival rate, water quality, weather and other factors, farming before the middle (shrimp body length of 3 cm to 8 cm), the daily bait for shrimp body weight of 6% to 8%, the later stages of farming (shrimp body length of 8 cm or more), the daily bait for shrimp body weight of 4% to 5%. Feeding twice a day, feeding period were 7:00, 19:00; evening feeding accounted for 50% of the total daily bait. Feeding method for uniform feeding along the edge of the pool.

Fifth, strengthen the prevention and control of diseases, in production, adhere to the prevention-oriented, first do a good job of pond water quality control, which is the key to preventing and controlling shrimp disease. Secondly, do a good job of water disinfection and insecticide, in June and August, respectively, with dibromo hydantoin and abamectin for sterilization and insecticide, can effectively control the occurrence of diseases.

South American white shrimp aquaculture feed saving methods

1, remove the wild fish, reduce the competition for food

Wild fish in the pool, miscellaneous shrimp is more, will compete with the South American white shrimp for bait, and even residual food white shrimp, low quality fish and shrimp compete for food feed, will reduce the utilization of feed, and therefore should pay attention to its removal, the method is to release the seedling into the water before the first 20?30 centimeters, 150 kilograms of quicklime per acre slurry! After the whole pond sprinkled for thorough pond disinfection, kill the pool cattle wild fish. Into the water with a filter bag to prevent wild fish with the water into the pool.

2, pay attention to the choice of feed and supplementation

2.1 To choose the regular manufacturers of South American white shrimp special feed, feed formula is reasonable, can ensure that the shrimp grow rapidly, to avoid waste of feed. Do not use other shrimp feed to replace.

2.2 Pre-breeding should pay attention to fertilization, cultivate a beneficial shrimp growth of biological communities, such as benthic organisms, plankton. And can be transplanted to the pool of some beneficial bait organisms, so that less bait or no bait, with the consumption of basic bait, you can feed some pathogen-free fresh bait and young shrimp with special feed, and then gradually transition to feeding the South American white shrimp special feed, which can save some feed.

2.3 Late breeding, when the shrimp disease outbreaks, feeding fresh feed has not caused a large number of shrimp disease, according to the local feed sources can feed some fresh bait to save bait costs. But pay attention to the feed must be fresh, not corrupt and spoiled.

3, keep the water fresh

Nursing shrimp first water, water quality affects the shrimp color, growth and bait coefficient. South American white shrimp like fresh water, good water quality, shrimp growth, disease, can make full use of bait, reduce the bait coefficient, and thus the breeding of South American white shrimp should pay attention to the regulation of water quality, keep the water quality fresh. The general requirements of the water was yellow-green, transparency 30?40 cm, dissolved oxygen 4 mg / liter or more for good.

Commonly used water quality control methods are:

① Diligent water change, ? generally 7-10 days to change the water once, each time to change 10%-20%;

② regular splashing quicklime, every 10-15 days, the concentration of 15 g / m 3;

③ installation of oxygenator, with the oxygenator regulator.

④ Use biological agents, such as photosynthetic bacteria, to regulate water quality.

4, master the baiting skills

4.1 A small number of times: according to the feeding habits of shrimp and growth characteristics, to adhere to the principle of a small number of times, and the amount of feed at different times is not the same, generally 7:00 to cast 30% of the daily feeding, 11:00 to cast 10%, 18:00 to cast 40%, 23:00 to cast 20%.

4.2 grasp the appropriate amount of feeding: the amount of bait is more difficult to grasp, too much feed waste, too little shrimp can not eat enough, is not conducive to growth. A more practical approach is to set up a bait table, set up along the pool around a few 1.0 meters 2 or so of the bait table, feeding along the pool evenly sprinkled, feeding 1.5-2 hours after checking the shrimp feeding situation, under normal circumstances, if the rate of satiated stomach accounted for 60%?70%, feeding is reasonable, full of high rate of stomach is to reduce the amount of feeding, too low to increase the amount of feeding.

4.3 According to the weather conditions feeding: the weather is sunny, wind and sun warm when feeding; bad weather, rainy, hot weather or cold spells when feeding less or not feed.

4.4 According to the shrimp feeding: according to the growth of shrimp and the presence or absence of disease flexibility to grasp the amount of feeding. Shrimp growth, no disease when appropriate feeding, and vice versa, less feeding; shrimp a lot of moulting less feeding, moulting a day after more feeding.

4.5 According to the water temperature feeding: water temperature is lower than 18 ℃ or higher than 32 ~ C less feeding, 25-30 ℃ more feeding.

4.6 According to the water quality feeding: water quality is fresh, dissolved oxygen is sufficient when the shrimp feeding strong, can be normal feeding; while the water quality is poor, dissolved oxygen is lower when less feeding or not feeding.