What are the prospects for cold-water fish culture? What's the method?

Cold-water fish is a living fossil in water. In China, there are many varieties of cold-water fish and abundant resources. After more than 50 years of development, cold-water fish industry has taken shape. To get into this business, we need to understand what the future holds for cold-water fish farming. How?

What is Cold Water Fish?

The concept of cold-water fish is put forward according to the living habits of fish. It usually refers to fish that live in waters between 18 ° C and 23 ° C. Cold-water fish mainly include cold-water trout, subcold-water sturgeon and Schizothorax.

II. What are the prospects for cold water fish farming

The living environment of cold water fish is relatively high quality, most of them live in clean and pollution-free waters, which determines their pollution-free product characteristics. Free-growing cold-water fish has tender flesh, no muscle spines, rich in unsaturated fatty acids such as EHA and DHA, high nutritional value and high economic value.

2. From the perspective of natural conditions, China has the basis for vigorously developing cold-water fish culture of Salmonidae. At present, the flow rate of cold water resources available in China exceeds 5000 cubic meters per second, and the potential of cold water fish culture exceeds 500,000 tons. In 2018, salmon trout fish farming accounted for only 8% of the available resources.

3. China's cold water resources are mostly distributed in the northeast, northwest, north and southwest regions. Relying on local natural resources, the rational development of cold water fish industry is of great significance to industrial poverty alleviation and the development of modern fisheries. In many regions, financial departments carry out poverty alleviation in combination with industries according to local actual conditions. Local farmers can also attract investment according to local natural advantages.

For example, Jiangkou County is located in the southeast of Fanjing Mountain, located in karst mountain area, rich in cold water resources, good water quality, very suitable for cold water fish breeding. Based on its own resource advantages, the local government has vigorously attracted investment. By the end of 2017,12 sites have been developed and utilized, 12 bases have been built, with a breeding area of 5000 mu and an output of 3100 tons. The county adopts the mode of "company + cooperative (or farm)+ poor household", which maximizes the benefits, not only improves the life of local people, but also solves the employment problem.

4. China's cold water fish industry is still in the development stage, and the breeding mode and product form are relatively single. Through technical guidance, project support and capital introduction, the breeding personnel can vigorously develop the cold water fish industry, and at the same time, based on the local foundation, expand the market outward, develop new products, and develop derivative industries based on cold water fish. Aquatic products, fisheries and tourism can be combined.

For example, Sichuan has become a big province of cold water fish industry. The cold water fish industry characterized by trout, sturgeon, elegant fish and indigenous fish has a strong development momentum, with a breeding area of 100,000 cubic meters of water and an annual output value of more than 1 billion yuan. In addition, they have made caviar their new business card. At present, the output reaches 20 tons and the export volume reaches 18 tons. More than one third of the output value of leisure fishery comes from cold water fish industry. This year, Sichuan Province finance combined with poverty alleviation policy invested 8 million yuan to support local cold water fish breeding.

2. What is the cold water fish farming method

1. At present, there are mainly two categories of trout and sturgeon. The selected aquaculture water conditions are good, the water temperature is low, 10-18℃ is appropriate, and spring water or clear river water can be selected as the aquaculture water source.

2, the construction of the culture pond to meet the needs of healthy farming, rectangular, rounded corners of the structure is the best, no dead corners, reasonable water, fish can be evenly distributed in the whole pool. Sewage discharge facilities shall be provided at the outlet of fishing pond. One layer of fish fence and two layers of gate shall be set, and inverted siphon drainage shall be adopted;

Parallel water supply should be adopted to reduce cross infection of fish disease. The water supply condition of fishing pond is not good. If the water supply of fishing pond in series is adopted, a sedimentation tank should be set under the drain to reduce the harm of metabolites such as residual bait and fish dung to the fish in the lower pond.

3. Although the stocking density of cold water fish can increase with the increase of water exchange and dissolved oxygen, the stocking density of cold water fish is too large, which may lead to turbidity of water body and increase of hydration index, thus further affecting the survival sense of fish, resulting in slower growth and weaker disease resistance.

Feed scientifically according to density, fish population, water temperature and other conditions.

In order to make cold water fish grow healthily, it is necessary to pay attention to the sanitary conditions of the culture pond at all times during the breeding process. Regularly clean up residue, dirt, water shortage, high water temperature, can use aeration equipment and supplement groundwater to increase dissolved oxygen in water to reduce water temperature; disinfection in the pool.

5, in addition to ordinary feed, but also need to regularly put some inorganic salts and other nutritional bait, this is to make cold water fish have better disease resistance, while helping the fish accumulate more nutrients.

When introducing new varieties in each region, quarantine work should be done to prevent sick fish from mixing in.

Cold-water fish farming needs to be carried out in combination with local excellent natural resources. With the support of industrial poverty alleviation policies, it should be done well. Taking the local market as the starting point and developing to the periphery, many cold-water fish farmers have now gone abroad.