Clay tank breeding of blue crabs, artificial breeding of blue crab breeding skills

Two years ago, Zeng Shangling, a laid-off female worker in Fangcheng District, after a detailed inspection of all the mangrove tidal flats along the coastline of the Beibu Gulf, felt that more than 300 acres of mangrove forests in the Dalan sea area of Jiangshan Township were very suitable for raising blue crabs, and decided to use the mangrove forest void to place a clay tank to breed blue crabs. So she began to use 3,000 clay pots to try breeding, each clay pot put 1 crab seedling, 3 months later, success, the survival rate of blue crabs reached more than 90%, became a hot commodity in the market. She led the establishment of the mangrove tile tank blue crab breeding cooperative, now the farmers have developed to 98 households, the breeding area of 54 hectares, 600 breeding altars per mu, 210 kilograms of commercial crabs per mu, an annual output of 109 tons of blue crabs, an output value of 6.55 million yuan, and an average net income of 10,000 yuan.

This breeding method is simple, using a tank and a crab method, without artificial feed, using natural epiphytes and fish in the mangrove ecosystem as bait for blue crabs, and the excrement of blue crabs can also provide fertilizer for mangroves, which is conducive to the growth of mangroves.

Fake, my friend tried, 1: The amount of labor is too large, and one person can't manage much. 2: The change of sea water is difficult to control, the survival rate is still very low, and there are many problems!!

1. Specifications and time of burying and cultivating: summer seedlings are generally stocked in June and July, with a specification of about 15 50 grams (an average of 25 grams), and after 3 or 4 months of breeding, the current year can reach the specifications of commercial crabs; Autumn seedlings are generally stocked in September and October, the size is 10 20 grams, and the overwintering is cultivated until May and June of the following year, and the commercial specifications can be reached. If the number of overwintering stocking is insufficient, another 50 100 grams of crab fingerlings can be replenished in March and April of the following year.

Fattening breeding, generally 9 10 October harvest more than 150 200 grams and have mated lean crabs, breeding 30 40 days up to paste crabs.

2. Stocking density. 4 May stocking 50 100 grams of wintering crabs, 200 500 seedlings per mu is appropriate, if the size is small, the density of seedlings can be appropriately increased, about two months can be rotated. At this time, it is the season of summer seedlings, you can stockpile small size summer seedlings, and the number of stocking seedlings per mu is about 1000 1500 per mu.

Fattening breeding stocking time in August and October, stocking density depending on environmental conditions can be mastered at about 500 acres is appropriate.

3. Water quality management. On the eve of the arrival of the small tide, check and repair the seepage water of the earth dam, increase the elevation of the overflow outlet, fill the water level, generally keep the water level at about a meter on the beach, in case of heavy rain, let the overflow dam overflow the upper layer of fresh water, in case of heavy rain, in case of sudden drop in seawater salinity and cause blue crab disease.

To build an ornamental crab tank, you first need to choose a suitable container, and the owner can choose according to his preferences, such as fish tanks and aquariums. Raising ornamental crabs also requires sand, such as pebbles, tiles, etc., and owners of stones, sunken wood, and aquatic plants can also consider it. The owner can also raise other ornamental crabs or ornamental shrimp to improve the ornamentality.

If you want to build a tank for ornamental crabs, you first need to know the things and equipment you need to raise ornamental crabs. Aquariums and fish tanks can be used to raise ornamental crabs, and owners can decide on containers according to the species of ornamental crabs they raise and their preferences.

If you want to make the ornamental nature of the fish tank higher, the owner can also plant two or three aquatic plants, or sunken wood, large stones, etc., which are not affected by the ornamental crab.

Of course, if the owner wants to raise more than a few kinds of ornamental crabs, it is also possible, but it is necessary to consider the characteristics of various varieties of ornamental crabs, it is best not to raise varieties that like to fight, and you can also choose to raise ornamental shrimp to improve ornamental landscaping.

The shell of the shelled blue crab generally hardens within 12 hours, and the soft shell crab can be kept for up to 72 hours through low temperature.