Culture techniques of Shrimp in bumper years

The shrimp is also called the annual worm, fairy shrimp, etc. It is an arthropod of the annual worm family, widely distributed in salt pans or salt lakes on land. It is widely used as a high-quality live bait in aquaculture. It is rich in protein and fatty acids. Therefore, it is a good bait for fish, shrimp and other seedlings. Let's take a look at the cultivation technology of the annual shrimp together!

breeding equipment

The cultivation of large-harvest shrimp requires almost no equipment and can survive in an environment with very low oxygen content. Generally, it does not need pumping oxygen. In the summer high temperature season, the dissolved oxygen in the water is small, if the breeding density is large, the bait left after feeding sometimes deteriorates and causes serious shortage of dissolved oxygen in the water. At this time, you can also use the air pump to inflate oxygen supplement, but the swimming ability of the shrimp is very weak, and the air pump should not form too much water flow, otherwise it can only float with the water flow, and there is no way to feed independently. The range of adaptation temperature is also very wide, it can survive in salt water under ice, and it will not lead to a large number of deaths in summer when it is as high as 40 degrees (if there is no oxygen at high temperature, only a small number of deaths). Generally, for the sake of cost, it is not necessary to heat up. It can also withstand high ammonia and high pollution, and no filtration equipment is needed under family farming conditions.

hatching method

Harvest shrimp eggs are generally stored in cold storage, in advance of hatching at room temperature dry placed about a week, otherwise the hatching rate is low. Small-scale incubation can use small containers as incubators, filled with light salt water. Incubation water and aquaculture water is just the opposite, to use very light seawater, about half seawater and half fresh water, the highest incubation rate, before use should be boiled disinfection, to prevent microbial mixing. The bottom of the container is equipped with an inflation port. Light inflation allows bubbles to rise slowly from the bottom, but the amount of inflation should not be too large. If the water temperature can be maintained at 20~30 degrees, the hatching rate will be better, and lower temperatures will not have serious effects. The hatching time of the first nauplii larvae varies from place to place. It takes about one to one and a half days. Stop pumping and let the water stand for 10 to 20 minutes. The nauplii swim in the middle of the water, empty egg shells float to the surface, and dead and unhatched eggs sink to the bottom. Use a straw to suck out the water containing nauplii larvae in the middle layer and pour it directly into the incubator. Then, you can also add light salt water to the incubator, continue to pump up for a day or two, and there will be nauplii larvae continue to hatch.

bait feeding

The best food for shrimp is plankton in seawater. After sunlight irradiation, a large number of algae will naturally grow in seawater for shrimp to eat. Generally, they can not be fed. However, in the case of higher cultivation density, other tiny organic substances can also be supplemented to increase the number of shrimp. In the domestic farming environment, organic wastewater can be continuously replenished to the water, such as protein separator wastewater, rice washing water or milk, yeast powder (dissolved in water). However, attention should be paid to supplementing these wastewater with high organic matter, adhering to the principle of less rather than excessive, and controlling the water quality to a constant degree of turbidity. If it is excessive, the water quality will deteriorate seriously, and the shrimp will also die in large numbers.

timely harvesting

The larvae of larval shrimp can mature after feeding for more than ten days. Most adult larval shrimp are female, and few or no males. Mature female shrimp will carry oocysts, this time nutrition is the highest, can be harvested. If there are different sizes of shrimp in a box, or some shrimp have already given birth to young, it is best to use a wide-hole net when harvesting, catch the big shrimp and let the small shrimp grow in the box. Follow-up management of the general culture of large-harvest shrimp seawater proportion of 1.07 or more, do not need special attention. After a period of evaporation, when the seawater concentration is higher, the shrimp will be relatively red in color and smaller in size, and the nutritional value will not be affected.