CATDOLL : CATDOLL: Clam farming is simple. What are the key points of clam farming technology?

1. Clam farming is very simple, what are the key points of clam farming technology?

Clams, also known as clams, are one of the important edible shellfish. They are not only delicious and nutritious, but also have high therapeutic and medicinal value. Because they like to live in river wetlands and intertidal zones with fresh water inflow, clams have high requirements for water temperature. Clams are wide-temperature shellfish and can adapt to temperatures between 0 and 36 degrees Celsius. They grow normally when the water temperature is between 5 and 35 degrees Celsius, and grow fastest between 18 and 30 degrees Celsius. The upper temperature limit of clams is 43 degrees Celsius, rising to 44 degrees Celsius.

Everyone knows that when eating clams, we must soak them in water for a period of time to soak out the remaining mud and sand in the clams. However, every time we soak the clams, we will find that there is still some mud and sand left in the clams, which often hurts the teeth when eating, affecting the taste. The scientific name of clams is Philippine curtain clams. It was first discovered and named in the Philippine waters. It is also called variegated clams in our local area. It is a very common seafood in the market. Clams belong to shellfish. They are slightly oval in shape and have relatively solid shells.

When we cultivate clams, we must choose some unpolluted sea areas with smooth tides and convenient transportation. The water quality must also meet the requirements. The main thing is that the time exposed to the air at low tide should not exceed four hours. The shell of the clam is small and thin, and is long and oval. The top of the shell is slightly protruding, and it bends slightly forward at the front of the dorsal edge. The radial ribs are fine and dense, and the ones located in the front and rear are thicker, interweaving with the concentric growth rings to form a cloth pattern. The color and pattern of the shell surface vary greatly, and there is brown.

Clams cannot be kept alive with fresh water, but you can make your own seawater to keep them alive. Clams live in seawater, and the average salinity of seawater is 35%, which means that on average every 1,000 grams of seawater contains 35 grams of salt. When making your own seawater, you need to let it sit for about 20 minutes after adding salt, because clams are saltwater organisms, and their cell fluid is adapted to saltwater. If you put them in fresh water, because the ion concentration of the clam cell fluid is higher than that of fresh water, cell wall permeation will occur, that is, low-concentration fresh water will enter the clam cells due to the pressure difference of the cell wall.

Strengthen management. After sowing the seedlings, regular inspections should be carried out to check whether the seedlings are lost, the growth rate and survival rate of the clams, so as to facilitate timely replenishment of seedlings and take relevant countermeasures. In addition, attention should be paid to the repair of the pond and dam to prevent the clams from escaping. In addition, the clams that have just bred are extremely weak and often float out of the pond. At this time, attention should be paid to the phenomenon of death due to human trampling. After breeding, management should be strengthened or they should be directly transplanted to other areas.

Choose a breeding site with flat terrain, or a pond with good water quality, and disinfect and clean the breeding site before stocking.

After sowing the seedlings, you should regularly check whether the seedlings are lost. According to the growth rate and survival rate of the clams, you should replenish the seedlings in time and take corresponding measures. Also pay attention to repairing the pond embankment to prevent the clams from escaping.

First of all, there must be sufficient water source, and the water quality must be particularly clear. It is best to put a layer of sea soil on the bottom of the water to make the clams more adaptable. Then the feed must be nutritious so that it can grow fatter.

2. What is the appropriate ratio of fresh water to sea crystal for raising clams?

Just add 3.4 catties of sea crystals per 100 kg of tap water. Generally, the salinity suitable for clams is 17 to 18 degrees. When blending, just pour the sea crystals into the tap water. If you are not sure, you can spend 20 to 30 yuan to buy a salinity meter to observe the salinity.

Sea crystal is a product of seawater and salt chemical industry, which is mainly produced through a series of processes such as evaporation, centrifugation and concentration of seawater or brine. It basically retains the main components of seawater and is concentrated seawater.

Selectively adding trace elements to it can not only replenish some elements and compounds lost in the production process, but also make the entire product more practical. For example, adding selenium, molybdenum, etc. can not only promote the growth of aquatic animals, but also make them develop in a healthier and more nutritious direction.

Additional information:

Things to note when raising clams:

1. Selection of breeding sites: Clams should be farmed near sandy beaches, in relatively flat areas with good air circulation.

2. Selection of clam seedlings There are three types of clam seedlings: white seedlings, medium seedlings and large seedlings. Choose different clam seedlings according to your needs. When selecting seedlings, pay attention to the uniform size of each batch of clam seedlings, and there should be no damage on the shell, and they should look strong and vigorous.

3. The time of sowing seedlings is determined by the size of the seedlings. Generally, white seedlings are sown in April and May, medium seedlings are sown from December to the spring of the following year, and large seedlings are sown before laying eggs.

3. The clam farming market is very hot. How big are the risks of farming clams?

The cultivation of variegated clams is to place clam seedlings on the mudflats of the sea area and let them grow in the natural environment, which will inevitably lead to death. It is not terrible to have sporadic clams. It may be that individual variegated clams cannot adapt to the environment and die. Another reason is that there are natural enemies of variegated clams on the mudflats, such as conchs, which prey on variegated clams, so it will cause individual deaths. The law of survival in nature is survival of the fittest, and the natural enemies are normal. As long as the number is not out of control, it will not cause large-scale death of variegated clams, so there is no need to worry too much. When cultivating variegated clams on the mudflats in the sea area, it is not necessary to put as many seedlings as possible, but the density must be controlled, generally not more than 100 per square meter. If the density is too high, the number of plankton in the sea water is insufficient, but it will affect the growth rate of variegated clams, which may cause serious death of variegated clams. For mudflats with too high density of variegated clams, the mudflats should be moved in time to solve the problem of slow growth and death of variegated clams by reducing the density of clams per unit area.

On the mudflats where the clam shells are newly found, check carefully whether there are stranded seaweeds. If there are seaweeds, be sure to follow up and observe. If the amount of seaweed increases with the temperature, measures should be taken to transfer the clams to other mudflats. In recent years, the trend of coastal currents has changed due to land reclamation. In spring and summer, a large amount of seaweed will be produced in the middle and low tidal zones, covering the mudflats where the variegated clams grow. The production of these seaweeds will directly cause the dissolved oxygen in the seawater to be too low, and the variegated clams will die on a large scale. When a small number of shells appear, the first thing to know is that the natural enemies of clams are starfish, red snails, etc. They all live on eating clams. In the past few years, a large-scale death of clams occurred in Hongdao, the largest clam production area in Qingdao, resulting in a reduction of about half of the production. It is reported that the local overfishing of fish has caused the starfish larvae floating in the seawater to lose their natural enemies. In addition, the abundance of seawater and the large-scale reproduction of starfish have led to the eating and killing of a large number of local farmed clams, causing significant losses.

They often eat clams in shallow seas, because the way red snails spread food is to drill in, and a small amount of shells appear, but this is not an absolute situation, and the situation must be constantly observed. According to the breeding method, whether it is beach breeding or pond breeding. Beach culture must choose a place with high sand content and unobstructed air. The sand must be turned over and dried, and the idea must be away from the polluted environment. In pond breeding, it must be sorted, exposed to the sun, and disinfected before adding seawater breeding. The breeding ground of clams should be in a tidal flat with gentle tides, flat terrain, high sand content, or a pond with good water quality and bottom quality. The transportation conditions of the breeding site must be good and away from industrial pollution areas. Tidal flat breeding should be changed, turning the beach, leveling the mud and sand that will be washed by the tide and dug out after sun exposure, and building embankments in areas that are susceptible to tidal erosion and covered with mud and sand to prevent the loss of seedlings. In pond breeding, the dam and sluice should be repaired, and the pond water should be drained before the seedlings are released in January. The bottom material should be exposed to the sun, disinfected, and the filtered seawater should be discharged for breeding.

The time of sowing seedlings depends on the size of the seedlings. Large seedlings are best sown before they are born and spawn. There are two methods of sowing, dry sowing and wet sowing. After dry sowing, the clam seedlings are sown evenly to prevent them from piling up; while wet sowing is to spread them evenly in areas with slow tides before the tide recedes. Wet sowing takes a long time to sow and has a high survival rate, but it is only suitable for large and medium seedlings. Attention must be paid to the sowing density. If the sowing density is too high, the clams will grow slowly, and if the density is too sparse, the yield will be low. The sowing density must be mastered.

Although it is very popular, the risks are indeed very high, and unnecessary things will always happen. If you have no experience, try not to raise it.

The risks are particularly high. Although the current market is very hot, the development prospects are not so clear.

Clam farming is indeed a bit risky, because the current prospects and trends of clam farming are not very good. You can wait and see for a while.