How are oysters grown and what are the growing conditions for oysters?

Oysters are oysters, oysters, also known as spiders, oysters, marine mollusks, and meat for consumption, which is a very expensive seafood in restaurants.

Oysters, also known as oysters, oysters, etc., are a type of seafood sedentary bivalve shellfish, generally sessile to live on rocks suitable for sea areas. There are many species of it, which are distributed in the north and south coasts of China, and the main species suitable for breeding in the southern sea area are pleated oysters; The main species suitable for aquaculture in the northern sea are Pacific oysters and Dalian Bay oysters.

The adaptability of oysters to various factors of the water environment is also different due to different species, and even varies greatly. The saline range of pleated oysters is that higher or lower is not conducive to growth. The suitable water temperature for the growth of Pacific oysters is 6-32, the water temperature is higher than 28 or lower than 6, the growth is slow or stopped, and the fastest growth is at the water temperature of 15-25. The suitable salinity range is optimal.

There are many oyster culture methods, including stone throwing culture, bamboo cutting, raft culture, floating raft culture, bottom sowing and multiplication. Due to the different breeding methods, the design yield per mu is also very different. Taking raft culture fold oysters as an example, rafts are set up at the lower edge of the tidal stream zone and low tide area, and oysters are hung on the rafts, each raft is 50-60 meters long, and a bunch of oyster seedlings are hung every 30 cm, with about 30 oysters per bunch. The spacing of the raft platform is 3-4 meters, the platform is one acre, the general breeding can be harvested after 7-8 months, the harvest season is 1-4 months, the individual size is 7-8 cm long, and the general yield per mu can reach 6-10 tons (fresh weight with shell).

Hello, I am glad to answer for you, 1. Take raft culture oysters (oysters) as an example, the breeding site should be selected in the sea area with less wind and waves, stable water quality, no industrial pollution, and the bottom is muddy or muddy, the water depth is guaranteed to be more than 8m, the water temperature change is small, and the summer is not more than 30, and the surface flow rate is between and the specific gravity is between. 2. Omi oysters, the suitable temperature range for growth is 10-33, and the suitable salt range is 5-25 coarse Zen. 3. The survival temperature range of Oyster is minus 3 to 32, the suitable temperature range for growth is 5-28, the suitable salt range is 10-37, and 20-30 is more suitable.

4. The living temperature range of the oyster is the same as that of the long oyster, which is minus 3 to 32, but the suitable salt range is narrow, which is 27-34. 5. The suitable temperature range for the growth of folded oysters is 6-25, and the adaptability to salinity is wide (close to that of Omijiang oysters), and it is distributed in the inner bay and near the sea. 6. The suitable water temperature range for the growth of Dalian Bay oysters is 6-25, and the suitable salt range is narrow, which is 25-34.

Oysters grow in the ocean, eat micro-algae, organic detritus and other foods in the seawater, and in the process of eating, they will suck the seawater into their mouths and filter out the seawater through filtration, and eat the algae mixed in the seawater.

They have no special regularity in feeding, they can live in 0 32 water temperature, the optimal water temperature for growth is 15 25, and the general water temperature is 10 25 when the feeding is vigorous, but in the breeding period, the feeding intensity is relatively weakened.

Introduction to Oyster Varieties:

Oysters, also known as oysters, are shellfish, their shell is divided into three layers, namely cuticle, nacre, prismatic layer, of which the cuticle is thin and transparent, the main component of prismatic layer and nacre is calcium carbonate, and oysters are resistant to stress, and can survive for two weeks after leaving the water.

Oyster farming methods:

Oysters can be cultivated on floating rafts, choose the sea area with small waves, stable water quality and a depth of more than 8 meters as the breeding area, and then put the oyster seedlings into the hanging box, and fix the hanging box on the floating raft.

1. Life style.

The life of an oyster is typical of the sessile type. Oysters are used to adapt to the living environment; As a result, the oyster's system, function, and living habits have developed adaptation to this sedentary lifestyle and ability. Oysters are fixed to other objects with a shell (left shell) and cannot move for life, so oysters have degenerate feet and very developed shells and spines to protect themselves.

Oysters do not have water pipes, and oysters' vital processes such as breathing and feeding are done by opening and closing shells.

2. Points. Cloth.

a) Horizontal distribution (regional distribution).

Due to the different adaptability of various oysters to temperature and salinity, there are wide and narrow varieties. The distribution zone of the well-adapted fold oysters extends from the Indian Ocean in tropical climate to the northern coast of Japan and China in subarctic climate, and mostly lives in the intertidal zone with variable salinity. Omi oysters are also widely distributed in Japan and China from the Yalu River in the Yellow Sea in the north to the coast of Hainan in the south, but it only inhabits the inner bays with low salinity near the estuary.

Pacific oysters were introduced from Japan and are distributed along the north and south coasts. Dalian Bay oysters, which are narrow-temperate and narrow-salin, are only distributed in the Yellow Sea and Bohai Seas, and live in high-salinity sea areas far from the estuary. Oyster is a species with wide temperature and narrow salinity, which is interspersed in some waters along the north and south coasts of China, and it is only suitable for living in high salinity seawater.

ii) Vertical distribution.

The vertical distribution of oysters also varies according to the species. For example, Omi oysters are generally most abundant near the low tide line to within 7 m depth, but have been observed in Longmen Port, Guangxi, from the mid-tide line to 20 m below the low tide line. Pleated oysters are found in the mid-to-low tide area and near the low tide line.

Dense-scaled oysters are found in deep seas. Dalian Bay oysters are generally distributed near the low tide line to a depth of more than 10 meters. The Pacific oyster is distributed in roughly the same water layer as the Omi oyster.

In the sea where oysters grow, the water that is not polluted is delicious, and now most of the sea water is polluted, and the environment in which oysters grow is very bad.

Many friends are catchy every day, "I haven't eaten pork and haven't seen a pig run". Many friends know that it is a fisherman's family, and they will ask if oysters are caught like fish? Today, I will tell you how the oysters grow, the delicacy that you enjoy every day.

Oysters are divided into those that grow naturally in the sea and those that are farmed. When it comes to naturally grown oysters, let's talk about the fun stories of my childhood. Shrimp farming by the sea in my hometown, the big pond of shrimp farming is called shrimp pond, it is built with cement, about ten meters high, the sea water can rise to half of the surrounding pond at high tide, so the outer wall of the shrimp pond is adhered to a large piece of small oysters with large nails, when I was a child, I often took a small short wood at low tide, nailed a nail at the end of one end, brought a small plastic bag, and went to the shrimp pond wall to dig oysters, and took down the meat, this is a delicacy, you can cook soup, you can also fry pho, this taste is many times stronger than fried Niu River.

There are two ways to raise oysters in my hometown, one is hanging and the other is planting. As the name suggests, hanging samples are naturally hoisted with ropes; Rice transplanting is to let the oysters be adsorbed on the pillars and the pillars are inserted in Haiti for cultivation. Oysters grow by feeding on microorganisms from the sea.

Today, let's take a look at the hanging oysters, the breeding cycle of hanging oysters is very short, generally around the month of each year, the sea people will go to the nursery to select seedlings.

Before August, the oyster seedlings will be purchased and the hoisting operation will be completed, the scaffolding will be erected, the pile will be purchased, the bamboo will be cut, and the workers will be transported to the ship, and after they reach the sea, they will dig a pit, erect the pile, build a shelf, and finally hang the newly purchased oyster seedlings Please take care of it by someone who understands the sea. The so-called understanding of the sea is to grasp the time of high tide and low tide according to the solar terms, which is definitely a person who lives by the sea, and must be an "expert" of the sea.

It can be sold in January of the next year, the breeding cycle of hanging oysters is very short, the oysters are about doubled in about 5-6 months, February is the death period of hanging oysters, the early opening climate is not suitable, late breeding, it will raise the size is not big enough, the oysters with shells are bought by the catty, once the size is not big enough, in addition to all the costs, there is little to earn, if you do not sell in time, once the batch dies, it is difficult to make money.

The harvest is tedious and painstaking, requiring workers to cut threads, trim excess adsorbent and sell them, and the oysters are either wholesaled to wholesale traders or retailed to nearby diners.

The people who buy are happy, and the people who sell are also happy, after all, the cost is being recovered little by little, and the hard work has been rewarded!!

1. It lives near the low tide line to the water depth of about 7 m near the estuary of the Jianglapaan River, and the salinity is 10% to 25%. Omnivorous, feeding on small plankton. Breeding season 5 September.

2. Inhabit mudflats and muddy seabed at a depth of more than 10 meters from the intertidal zone to the low tide line, and usually live in normal seawater. The individuals that live in seawater with low salinity are large. It is distributed in Lianghao along the coast of China, and is an excellent species for estuarine and inner bay aquaculture.

3. It inhabits the intertidal impoundment and the rocky reef about 20 m below the low tide line, with high salinity, and the breeding period is June and August.

It inhabits rocky reefs with a depth of about 15 to 30 m below the low tide line, or at the bottom of the muddy and sandy sea cover, and can sometimes be seen several meters below the low tide line. The salinity is 27% to 34%, and the breeding season is 5 September, when the water temperature is 17 19 to start spawning.

<>1. The growth process of oysters is as follows: the fertilized eggs of oysters develop into swimming larvae, which are called marginal membrane larvae. After two weeks, the larvae permanently anchor to other objects, such as other oyster shells or rocks, and after three days of immobilization, the larvae lose their ability to swim and become small adults called oysters.

Harvest after 3 to 5 years.

2. Oysters, also known as sea oysters, oysters, etc., are a kind of bivalve shellfish with a sessile life type of seafood, which generally lives on rocky oranges suitable for sea areas. There are many kinds of Qiaohe group, which are distributed in the north and south coasts of China, and the main species suitable for breeding in the southern sea area are the oyster; The main species suitable for aquaculture in the northern sea are Pacific oysters and Dalian Bay oysters.