1. The selection of aquaculture ponds is not standardized. First, poor pond water quality, small individual ponds, or shallow water depths. The second is old ponds that have been breeding for many years. The silt is thick, the slope ratio is small, the clear ponds are not thorough, and predators are numerous. Some ponds have cultivated flower pods, clams or bamboo razor clams, and cultivation has not been able to thoroughly dry beaches, clean ponds and disinfect. Some are squid ponds in the contiguous area, with different breeds and different specifications. In addition, the pool penetration is serious, resulting in incomplete sunbathing. Drainage into the drainage ditch is serious. Third, poor access to water conditions, some small shrimp ponds can not change the water. Fourth, the lack of fresh water sources, the proportion of seawater is high.
2. Poor bait cultivation and food deprivation The jellyfish feeding activity continues day and night. After a full stomach, food is digested after 4 hours to 5 hours. The sea bream has a large amount of food. Artemia nauplii as the bait, the individual's daily food intake at the umbrella diameter of 20 mm is 0.6 million; at 70 mm, it is 100,000; at 110 mm is 260,000; at 230 mm, More than 2.9 million. Its growth is abnormally rapid. The dish-shaped larvae with a body weight of 3 milligrams can grow to more than 10 kilograms after 2 months of growth, and the weight gain is more than 300 million times. The growth rate of sea lice is closely related to the food organisms in the water body.
3. Improper specifications and density of seedlings, or poor techniques for seedlings and seedlings, have resulted in low survival rate of seedlings and impact on catch-recovery rates.
4. The aquaculture management technology can not keep up with the ineffectiveness of the blocking measures. The top of the soft umbrella of the jellyfish is easy to rub against the wall of the pool, causing damage and causing the death of the jellyfish. The second is water quality management technology. The first raising of water to raise the earthworms, the degree of water body fat and physical and chemical factors, should adapt to the growth needs of jellyfish, and many breeders, only know that the body's fatness is related to the bait, ignore the water quality of the "fat, live, cool" three elements .
Second, to improve the recovery rate of sea bream breeding in ponds
1. Select a standardized pond, thoroughly clear the pond, suntan, and disinfect. At the same time, implement reasonable blocking measures. A fence or plastic sheet should be added at a depth of 0.5m near the shore and supported by a bamboo rod to prevent the death of the jellyfish.
2. Before laying the seedlings, we must do a good job of fertilizer and water, increase the amount of plankton in the water, so as to ensure the dietary biomass of the seedlings in the early stage. Fertilizer water concentration should be appropriate to deteriorate the waterproof material, affecting the survival rate of seedlings. Fertilizer with chicken manure must pay attention to the chicken manure thoroughly fermented 7 days to 8 days before use. During the hot season, it is best to use chicken manure instead of fertilizer to prevent water pollution. Water quality should be checked before release, mainly water temperature, salinity, plankton, pH, etc. At the same time, attention should be paid to the water temperature, salinity, and other indicators of the nursery pond and the rearing pool, and the gap between the two should be adjusted to the minimum through the nursery room so as to avoid affecting the survival rate of the seedlings due to the large gap.
3. Selecting a healthy, disease-free and larger-sized seedling is a prerequisite for successful breeding.
4. Do a good job of seedling transportation and seedlings raising the survival rate of seedlings. The time for planting should be in the morning or evening when the weather is better, preferably without wind and direct sunlight. Seedlings should be transported with oxygen, shading, and ice to prevent heating up and affect the survival rate. After the seedlings are transported to the edge of the pool, they should not be rushed to put the seedlings into the pool. They should first untie their pockets and observe their vigor. Then the seedlings should be poured into a relatively large container and some pond water should be added. The seedlings are adapted for a period of time (10 minutes to 20 minutes) and then placed in the pool. When laying seedlings, the seedlings should be transported to the middle of the pond with a boat and spilled evenly into the pool. The operation should not be carried out rashly. It should be carried out slowly to prevent injury.
5. Do a good job of daily aquaculture management, especially changing water and manure water (dressing) work.
Features: Official Tourniquet of the U.S. Army; Proven to be 100% effective in occluding blood flow in both upper & lower extremities by the U.S. Army`s Institute of Surgical Research; NEW Single Routing Buckle for faster application, decreased blood loss, effective slack removal, fewer windlass turns, and simplified training with single protocol application standards; Includes reinforced windlass, stabilization plate, windlass clip and writeable windlass security strap; Red Tip elliptical tab providing added visual clues during application.
Special Features:
· Official Tourniquet of Army
· Used by both conventional and Special Operation forces
· Proven to be 100% effective in occluding blood flow in both upper & lower extremities by Army`s Institute of Surgical Research
· True, one-handed application tourniquet
· Quickly controls life-threatening extremity bleeding
· Designed to perform in all weather conditions
· Small and cost-effective
·
Dimensions:
· Packaged: L 6.5 in. x W 2.4 in. x D 1.5 in.
· Open Length: 37.5 in.
· Weight: 2.7 oz
[Features]
· Used by both conventional and Special Operation forces
· Proven to be 100% effective in occluding blood flow in both upper & lower extremities by t Army`s Institute of Surgical Research
· True, one-handed application tourniquet
· Quickly controls life-threatening extremity bleeding
· Designed to perform in all weather conditions
· Small and cost-effective
Black Cat Tourniquet,Orange Cat Tourniquet,Blue Cat Tourniquet,Combat Application Tourniquet
Anping Longji Medical Equipment Factory , http://www.azmedicals.com