Clams are common seafood, what are the precautions for clam farming?

The square clam, commonly known as the white clam, gets its name from its quadrangular shell. Its shell is thick and slightly quadrangular in shape. The two shell poles are expanded.

The top of the housing is protruding, located on the trailing edge**, slightly forward, with the tip bent forward. The shell has an outer skin, white at the apex, pale purple in juveniles, yellowish-brown near the ventral margin, often with narrow borders. The growth line is obviously thicker, forming uneven concentric rings, the inner surface of the shell is white, the hinge part is wider, the left shell has a forked main tooth, and the right shell has two main teeth arranged in a figure of eight; The anteroposterior teeth of both shells are lamellar, the left shell is single, and the first shell has bright double sheets.

The external ligaments are small and yellowish. The internal ligaments are large and yellowish-brown. The adductor landmarks are distinct, the adductor anterior is slightly smaller and oval, the adductor is slightly larger and nearly rounded, and the outer coat is clearly marked close to the ventral margin.

Clam shell meat is edible, tasty, and nutritious. Cultivating four-horned clam shells is economical. 1. Proliferation method.

1) Resource protection: beach closure care, protection of nurseries; Limit the amount of fishing, collect in turn, prohibit human destruction, move and raise in a planned way, and increase the amount of resources. Limit the fishing season and size, prohibit fishing during the breeding season, and the length of the fishing size should be more than centimeters.

Improved substrate: Distributing substrate on the tidal flat to provide a good attachment base for clam shells is an important way to increase the growth of four-horned clams. During the seedling season, the tidal flats are leveled to prevent flood impact and floating mud burial.

2. Breeding methods. The site selection and finishing of farmland should be based on fine sand or mud sand, flat and stable beaches, medium and low tide areas, and should be leveled and eliminated after site selection, and the entire farmland should be enclosed with polyethylene nets with a height of about meters.

Larger farmlands should be separated by nets and divided into small areas to avoid the accumulation of clams in the four corners when moving. The stocking density should be determined according to the purpose of breeding and the conditions of the sea area, and the temporary stocking density can be higher. Generally, when the larvae with a shell length of 2 cm are put into breeding, they can be controlled at 50,070 kg mu.

3) When the beach is out of the beach, the tide is low, and the young shellfish are evenly scattered on the beach, it can be carried out: seedling sowing. It can also be transported by boat to pre-marked tidal flats and evenly sown at high tide.

Cultivation management: During the cultivation period, it is necessary to prevent disasters, damages, and escapes. After strong winds and rains, check the blockage and evacuate in time if the clams roll and accumulate due to wind and waves.

Harmful snails, fish, crabs, birds, etc. in the breeding area should be often collected or driven away in spring, and the juvenile shellfish with a body length of 2 cm can grow to 3 cm after autumn. Four-horned clams grow to about 3 cm and can be harvested.

First of all, it depends on the place you choose, in the choice of the site is generally to choose the wind and waves are relatively small, and there needs to be a small amount of fresh water in the tidal flats, in the middle tide or low tide of the place is the best, the ground is relatively flat, the water quality is not polluted, such a place, whether in the cultivation process, or in the later management is more convenient. Second, after choosing a good place, the next thing is to transport the seedlings over, when transporting, remember not to transport with water, to dry transport, because it is more dry, but winter and summer are still very different, winter can live for two or three weeks, but summer can only live for two or three days, so there must be a certain humidity when transporting, and the temperature should be controlled relatively low, so as to facilitate transportation.

Breeding sites. The breeding origin of clams should be selected in the tidal flats of the low-tide area with smooth tide, flat terrain and high sand content, or in the pond with good water quality and bottom quality conditions. The tidal flat aquaculture should be turned over and changed, and the turned out sediment will be washed by the tide and exposed to the sun, and then leveled, and the embankment should be built to prevent the loss of seedlings in the areas that are susceptible to tidal erosion and sediment covering.

The pond aquaculture should do a good job in the renovation of the dam and sluice, drain the pond water in January before the seedling, expose the substrate, do a good job of disinfection, and filter the seawater aquaculture in the discharge.

The first water quality should be fertile, preferably rich in plankton, and the second water quality should be fresh and the oxygen in the water should be sufficient, and the weak acid water quality should not be suitable for raising clams.

The flower clam, also known as the clam, is one of the important edible shellfish, not only the meat is delicious and nutritious, but also has a high therapeutic and medicinal value. Because it prefers to live in areas such as river wetlands and intertidal zones with fresh water infusion, the water temperature requirements of the clam. Flower clams belong to the wide-temperature shellfish, between 0 36, all of which can be adapted; When the water temperature is between 5 35, the growth is normal, and between 18 and 30, the growth is the fastest.

The upper limit of the temperature of the flower clam is 43, rising to 44.

We all know that when eating this kind of seafood, we must soak it in water for a period of time, so that the remaining sediment in the clams can be soaked out. However, every time you soak the clams, you will find that there is still some sediment left in the clams, which often hurts your teeth and affects the taste. The scientific name of the clam is Philippine curtain clam, which was first found and named in the Philippine waters, and is also called variegated clam in our local area, a very common seafood in the market.

The clam is a shellfish with a slightly oval shape and a sturdy shell.

We must choose some sea areas that are not polluted, and then the tide is relatively smooth and the traffic is convenient to breed. The main thing about the water quality is that it should not be exposed to the air for more than four hours at low tide, and the clams are small and thin and oval. The top of the shell protrudes slightly and bends slightly anteriorly anteriorly to the dorsal margin.

The radial ribs are fine, the anterior and posterior parts are thicker, and the concentric growth chakras are intertwined into a cloth pattern. The color and pattern of the surface of the shell vary greatly, and there is brown.

Clams can't be raised with fresh water, but they can be raised with homemade seawater. Clams live in seawater, the average salinity of seawater is 35%, that is, an average of 35 grams of salt per 1000 grams of seawater, when homemade seawater is added to the salt to stand for about 20 minutes, because clams are saltwater organisms, their own cell fluid is adapted to saltwater, if you put in fresh water, because the concentration of liquid ions in clam cells is higher than that of freshwater, so cell wall osmosis will occur, that is, the concentration of fresh water is low because of the cell wall pressure difference will enter the clam cells.

Strengthen management. After sowing seedlings, it is necessary to frequently inspect and manage to check whether the seedlings are lost, how the growth rate and survival rate of clams are, so as to facilitate timely replenishment of seedlings and make relevant countermeasures. In addition, it is necessary to pay attention to the repair work of the Chengdi and the embankment to prevent the clams from escaping, and in addition, the clams that have just bred are extremely weak and often emerge from the Chengdi, so they should pay attention to the phenomenon of death due to human trampling, and strengthen management or directly transplant other areas after breeding.

It is necessary to choose a flat terrain breeding site. Or choose a pond with high water quality, and disinfect and clean the breeding site before releasing seedlings.

After sowing seedlings, it is necessary to check whether the seedlings are lost, replenish the seedlings in time and take corresponding measures according to the growth rate and survival rate of the clams, and 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 should be particularly clear, it is best to put a layer of soil in the sea at the bottom of the water, which can make the clams more adaptable, and then the feed must learn some nutritional value, which can make it grow more fat.

To choose a suitable temperature, use some fresh water and spread a layer of sand and mud on the bottom of the water, finally keep enough oxygen, and change some water sources in time, use some of the feed to be of very high quality, and maintain a certain level of hygiene and cleanliness.

When breeding, we must choose a high-quality environment, and then we also need to replace the water source in time, to ensure that the oxygen in the water is sufficient, and we also need to regularly remove some aquatic weeds or impurities in the water, need to feed some bait, and also need to keep the water quality not polluted.

It needs to be maintained at a very good temperature, there should be some water flow, there should be some sediment at the bottom of the breeding, to be fed according to their growth, and the breeding position should be adjusted more during the breeding period, so that there can be a better breeding result.

Clams have higher requirements for the environment, choose some as much as possible, the terrain is relatively flat, the tidal flow is large, the beach with high sand content, the depth of the cave is best guaranteed to be about 3 10 cm, and it is also far away from polluted industrial areas.

In the process of clam farming, it is necessary to breed according to the growth size of the clams to ensure the yield and quality of the beetle. Secondly, it is necessary to strengthen the temperature management of the breeding area, improve the survival rate of beetles, and basically do not have to worry too much in the usual feeding management. As long as the farm does not put feed regularly, it strengthens the nutrition of water bodies and plankton and promotes the growth of beetles.

The feeding mode of the flower clam is passive filter feeding, mainly feeding on unicellular algae such as Rotella, Scapulata, Chlorella, and Rhomboides, as well as eggs and eggs of invertebrates, D-shaped larvae of bivalves, copepods, arthropods, and a large number of organic detritus. Because the breeding conditions of the flower shells are relatively high, we must prepare everything before breeding. This is the only way to guarantee the success of breeding.

This includes two aspects, the first is about the selection of farms, because the shellfish can not be transported for a long time, so try to choose a place with convenient transportation, and then the water quality of the breeding pond should also be very clean and not polluted.

Generally, the breeding cycle of the sixtieth is about one year, and the specific is determined according to the size and specifications of the seedlings of the sixtieth snails! Generally, the artificial breeding cycle of the flower shell is about 1 year, which is just a stable performance, in fact, the overall breeding profit of the flower shell is still very considerable, especially the current market is hot, which promotes the rise of market demand, and the breeding cycle of the flower shell is short, and it can be sold all year round. In addition, in terms of cost input, the principal does not need to be very large, the feed eaten is relatively cheap, and the energy consumed is relatively small.

In general, shell farming is a recommended breeding project with good breeding prospects.

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The growth cycle is generally more than two years, and its growth is very dependent on temperature, environment and humidity, and it will reach sexual maturity after two years.

Clams are very easy to farm, and their breeding cycle is relatively short, about 10-16 months, and they can raise mature clams that are about 30mm long.

The market demand for clams is strong, and the breeding cycle of clams is generally about three or four months.

Chinese clams, commonly known as "yellow clams" and "flying clams", belong to the genus Clams, Clamopods, Flapills, Heteropods, Clamoperas, and Clams. There are more than 30 species in 8 genera, including clams, otters, clams, clams, clams, clams, Among them, there are three most common economic species, namely stone tongue, square clam and clam clam clad, which belong to the worldwide distribution, mainly distributed in the west coast of North America, Canada, Australia, France, Indonesia, Thailand, Vietnam, Japan, South Korea, the Philippines, China and other countries and regions, especially China, Japan, South Korea and Australia.

Chinese clams are mainly found along the Yellow and Bohai coasts of Liaoning and Shandong. According to the data of China Fishery Statistical Yearbook 2019, in 2018, the production of clam aquaculture in Liaoning Province was 10,000 tons, Fujian Province was 10,000 tons, and Jiangsu Province was 10,000 tons.

Clam farming has good economic benefits. Clam farming can effectively fix and transfer carbon in seawater, which has a positive impact on the ecological environment. In recent years, due to the influence of the marine environment, the area of clam cultivation in China has declined.

In 2018, the area of clam farming in China was 10,000 hectares, down from 10,000 hectares in 2017. The culture of clams in China is mainly distributed in Liaoning, Shandong and Jiangsu. In 2018, the area of clam farming in Liaoning Province was 10,000 hectares, Shandong Province was 10,000 hectares, and Jiangsu Province was 10,000 hectares.

Farmed pike crabs: Compared to our brothers who have experienced strong winds and waves, our "captive" crabs are not inferior. Over the past five years, our crab farming** has been relatively stable with very little fluctuation.

This year, the wholesale price of half-catty pike crab is about 50 yuan a catty, and the market retail price is more than 70 yuan a catty. Three or four crabs** are slightly lower, with a wholesale price of 30 to 40 yuan and a retail price of about 50 to 60 yuan. Huang Ma crab harvest is late, generally from late October, ** slightly higher, the retail price per catty reached more than 80 yuan.

This ** is taller than the southern crab, we are all top fat!

Breeding pike crabs: Jimo has a history of crab breeding for more than 20 years, mainly distributed in Fengcheng, Tianheng and other coastal mudflats, with an area of about 5,000 acres. It is the main production area of Qingdao crab farming.

Every spring, conservationists harvest wild female crabs from the high seas for breeding. Therefore, most of the crabs farmed are seedlings raised by local nurseries. Farmers generally start planting seedlings in the first half of May, and from the end of September, as the water temperature gradually decreases, our activities will become fatter and the meat will become more delicious, and the harvest period can last until November.

Our captive crabs seem to have much less competition for survival than catching crabs in the sea, but our nature is aggressive. When we are crab seedlings, we will use crab claws to push and fight with each other, which is easy to cause**. Farmers would mix us with the chaff during transportation, reducing the chances of us fighting.