CATDOLL : CATDOLL: Which marine fish are suitable for breeding in the north?

1. What marine fish are suitable for breeding in the north?

Cold-water fish such as rainbow trout, Taimen salmon, and Ussuri whitefish have advantages in breeding in Heilongjiang. Crayfish cannot be bred outdoors under the current temperature conditions in the north. If you have financial strength, you can breed them in a small laboratory and expand the scale when the time is right. Crayfish are mainly grown in Hunan and Hubei. The crayfish in Yuanjiang City, Hunan are good. Maybe there are fewer wild ones now, and they are basically farmed. I wish you success.

2. What are the main marine farmed fish in my country?

There are more than 2,200 species of marine fish in my country, of which at least 90 species from 30 families are farmed. The main farmed species include sea bass, grouper, red fish, cobia, crucian carp, sea bream, yellow croaker, pufferfish, and flatfish.

3. What is the marine aquaculture area in the North Sea?

Beihai City focuses on promoting the construction of a national marine ranch demonstration zone, adheres to the concept of "ecology, efficiency, and brand", highlights the orientation of "quality, safety, and efficiency", uses the sea area scientifically, vigorously develops deep-sea aquaculture, expands the scale of deep-water wind and wave resistant cage aquaculture, accelerates the establishment of a modern marine aquaculture demonstration zone, and promotes the transformation and upgrading of traditional offshore aquaculture to modern deep-sea aquaculture; in the first quarter, the city's fishery output value increased by 4.2%. At present, Beihai City has developed into the largest cage aquaculture base in Guangxi, with an aquaculture area of ​​more than 350,000 square meters.

4. Fish farming technology?

1.

Stocking time selection: Fish should be released on sunny days when the temperature is not too low. Generally, the temperature should be between 2℃ and 5℃. At this stage, the fish scales are tight and the activity is small. It is not easy to injure the fish during fishing, transportation and stocking operations, which can reduce the morbidity and mortality of fish. It is easy to frostbite the fish on rainy days with low temperature or snowy, frozen and windy weather; when the temperature is too high, the fish scales are loose and the activity is large, which is easy to injure the fish during operation.

2.

Stocking of fish: Before stocking the fish, check whether the drugs have lost their effectiveness after pond cleaning. In early spring, the water temperature is low and the toxicity disappears slowly. Water should be taken in advance and test fish should be released. According to the stocking plan, individual size, density, and matching species and specifications, the fish that can be released at one time should not be released in batches, so that the fish can adapt to the environment, start eating early, and promote growth. At the same time, [Gold Iodine] should be used for drug disinfection when stocking fish.

3.

Feeding at the right time When the water temperature rises to 810℃, fish begin to eat, and the amount of food intake gradually increases with the increase of water temperature, so they should be fed in time. Feed once a day or every other day, and choose to feed at noon on a sunny day; as the water temperature continues to rise, the number of feedings can be increased to twice, that is, feeding once in the morning and once in the afternoon. Feeding should adhere to the principle of four determinations (timing, quality, positioning, and quantity), and the specific daily feeding amount should be flexibly controlled according to the weather, water temperature, and the feeding situation of fish. For grass carp weighing more than 1 jin, it is recommended to feed Da Beinong high-grade expanded feed 8103 in the early stage of feeding; for small grass carp mode, it is recommended to feed Da Beinong microecological juvenile fish special feed [Intestinal Liver Health], and the feeding rate is controlled at about 0.5%1%. This product is rich in nutrients and probiotics, which can quickly repair the fish intestines, restore the physique, and improve immunity.

5. How many species of fish are farmed?

Grass carp, black carp, silver carp, bighead carp, carp, crucian carp, bream, and bighead carp are farmed fish. These eight fish are all carp fish, warm-water fish, with large spawning capacity and strong reproductive capacity. They can spawn naturally, have sufficient seedling sources, strong disease resistance, a long history of artificial breeding, and mature artificial breeding technology. The breeding method is flexible, and can be intensive or extensive, and can be fed with artificial bait or commercial fish feed.

6. Fish breeding techniques?

1.

Stocking time selection: Fish should be released on sunny days when the temperature is not too low. Generally, the temperature should be between 2℃ and 5℃. At this stage, the fish scales are tight and the activity is small. It is not easy to injure the fish during fishing, transportation and stocking operations, which can reduce the morbidity and mortality of fish. It is easy to frostbite the fish on rainy days with low temperature or snowy, frozen and windy weather; when the temperature is too high, the fish scales are loose and the activity is large, which is easy to injure the fish during operation.

2.

Stocking of fish: Before stocking the fish, check whether the drugs have lost their effectiveness after pond cleaning. In early spring, the water temperature is low and the toxicity disappears slowly. Water should be taken in advance and test fish should be released. According to the stocking plan, individual size, density, and matching species and specifications, the fish that can be released at one time should not be released in batches, so that the fish can adapt to the environment, start eating early, and promote growth. At the same time, [Gold Iodine] should be used for drug disinfection when stocking fish.

3.

Feeding at the right time When the water temperature rises to 810℃, fish begin to eat, and the amount of food intake gradually increases with the increase of water temperature, so they should be fed in time. Feed once a day or every other day, and choose to feed at noon on a sunny day; as the water temperature continues to rise, the number of feedings can be increased to twice, that is, feeding once in the morning and once in the afternoon. Feeding should adhere to the principle of four determinations (timing, quality, positioning, and quantity), and the specific daily feeding amount should be flexibly controlled according to the weather, water temperature, and the feeding situation of fish. For grass carp weighing more than 1 jin, it is recommended to feed Da Beinong high-grade expanded feed 8103 in the early stage of feeding; for small grass carp mode, it is recommended to feed Da Beinong microecological juvenile fish special feed [Intestinal Liver Health], and the feeding rate is controlled at about 0.5%1%. This product is rich in nutrients and probiotics, which can quickly repair the fish intestines, restore the physique, and improve immunity.

Four,

Add organic fertilizer to improve the fertility of the water body. Sanyingshuiwang organic biological fertilizer has a long-lasting fertilizer effect. Yizaoyuan promotes algae growth and quickly fertilizes the water. After the fish pond is cleaned, frozen, and disinfected in winter, the fertility of the water body is low. As the saying goes, raising fish starts with raising water, so fertilizing the pond water is particularly important. In spring, it is best to apply organic fertilizer. It is recommended to use biological fertilizers rich in various trace elements [Sanyingshuiwang] or Yizaoyuan, which are rich in trace elements. The specific amount of fertilizer and frequency should be determined according to the quality of pond water and fertilizer.

The general principle is: early spring, large amount and few times, late spring, small amount and many times. Make the pool water green (including blue-green, yellow-green and bean green) or brown (including yellow-brown, reddish brown and tea-brown), the water transparency is moderate, maintained at about 30 cm, the water temperature is low in early spring, it should be controlled at 20-30 cm, the temperature is high in late spring, it should be controlled at 25-35 cm, the water quality should be kept rich, active, tender and refreshing.

7. Marine fish farming cycle?

The breeding cycle of different species is different. The breeding cycle of blue grouper and oily grouper is about 1 year, while the breeding cycle of eastern grouper and humphead grouper is as long as 2-3 years. Cost analysis: The cost of breeding grouper includes seedlings, feed labor costs, water and electricity costs, management fees, epidemic prevention costs, etc. The breeding cost of one acre of grouper is about 400,000 yuan, and the profit is more than one million yuan, which is very considerable.

8. What is the definition of artificial fish farming?

Fishery farming is also known as aquaculture, which is the artificial breeding of various fish species and seafood to meet market demand. It can be roughly divided into three categories: freshwater farming, saltwater farming and marine farming. Freshwater farming is carried out in inland ponds, lakes and other waters.

Freshwater aquaculture includes fish farming in rice fields, reservoirs, ponds, etc., mainly breeding fish and shrimps, with a high production level, large output and high returns.

Saltwater aquaculture is suitable for breeding some seafood that have special requirements for water quality, such as tilapia, pike, white shrimp, American red fish, carp, etc.

Marine aquaculture utilizes coastal beaches and bays to cultivate fish, shrimp, shellfish, algae, sea cucumbers, etc. It has high yields, short growth cycles, and high economic benefits.

9. Marine aquaculture methods?

There are currently two main types of farming: beach enclosures and cage farming in the sea.

10. Marine diatom farming?

Diatoms are a relatively good algae phase in aquaculture, and they have a very solid foundation for promoting water quality and the growth of aquaculture objects. However, it is not easy to maintain diatom water quality in aquaculture, especially in soil ponds. The cost of maintaining diatoms is relatively expensive. We need to understand the purpose and function of the algae phase, so we can use non-diatom water quality to replace the algae phase in the water body. The water quality that combines diatoms and green algae, yellow-green water, is also a very good algae phase. It is located below the diatoms, but its function and purpose are the same. Moreover, compared with diatom water quality, its algae and bacterial phases are more stable, and it is not easy to overturn or transfer algae. It is also a kind of water quality that is very suitable for aquaculture objects to adapt to water quality. Diatom cultivation is a process of fertilizing water, so to be more specific, it is water fertilization. There are several ways to fertilize water, one is fertilizing water with compound fertilizer, the second is fertilizing water with fermented manure, and the third is fertilizing water with microecological methods. The first two cannot form a closed loop, and the water quality and algae phase after fertilization are unstable, and it is easy for algae to overturn or turn into algae, so it is not recommended to use the first two for fertilizing water. The latter can form a closed-loop management, forming a good and stable algae phase, stable water quality, bacteria promoting algae, and algae promoting water. The two work together and inhibit each other, and it is not easy for algae to overturn or turn into algae, even if there is a sudden change in temperature or weather (such as heavy rainfall, etc.). Therefore, the latter is used in a higher proportion of the model applied in conventional water body aquaculture.