CATDOLL : CATDOLL: Fish farming technology? Complete guide to marine aquaculture technology?

1. 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.

2. Complete guide to marine aquaculture technology?

Recently, the Agriculture and Animal Husbandry Bureau of Tangshan City, Hebei Province organized relevant experts from the Ocean University of China, the Chinese Academy of Fishery Sciences, the National Fisheries Technology Extension Center and other units to conduct on-site acceptance of the "Seawater Pond Engineering Recirculating Aquaculture Technology Demonstration Project" undertaken by the Tangshan Fisheries Technology Extension Station and implemented by Tangshan Haidu Aquatic Food Co., Ltd.

The expert group listened to the report of the project unit, reviewed the materials submitted by the project team, and conducted on-site acceptance. It is worth noting that the application of pond engineering recirculating water aquaculture technology in seawater pond aquaculture is the first time in China.

With the technical support of Ocean University of China, this seawater pond engineered recirculating aquaculture technology demonstration project has constructed an engineered recirculating aquaculture system for seawater ponds suitable for the northern region, and successfully explored two aquaculture models with redfin pufferfish and striped seabass as the main aquaculture species, and Manila clams, hard-shell clams and seahorses as water-purifying plant and animal species.

During the breeding process, not only was zero discharge of aquaculture wastewater achieved, but solid waste such as feces and leftover bait was also utilized as resources; the fish in the experimental pond grew well and were in healthy condition, and the incidence rate in the experimental pond was significantly lower than that in the control pond. The redfin pufferfish, striped sea bass, Manila clam, American white clam and sea horsetooth all reached the expected specifications and yields.

The seawater pond engineering recirculating water aquaculture technology can effectively save water resources, achieve zero emissions, improve aquaculture production efficiency, and ensure the quality and safety of aquatic products. The application of this technology can accelerate the transformation of new and old kinetic energy in the marine aquaculture industry, promote the transformation of the marine aquaculture industry from traditional aquaculture methods to high-yield and high-efficiency aquaculture methods, and achieve the goals of improving quality, increasing efficiency, saving water and reducing emissions.

3. Marine shrimp farming technology?

1. Breeding facilities

The pond area should be 4-10 mu, 1-1.5 meters deep, and the slope ratio should be 1:2.5. The bottom of the pond should be flat, loam is preferred, the slope of the pond should be hard, the pond should have good water retention, and the water level should be easy to control. The water source should be sufficient and the water quality should be pollution-free. According to the pattern of high irrigation and low drainage, the water inlet and outlet channels should be built to ensure that water can be irrigated and discharged.

2. Preparation before stocking

Thoroughly clean and disinfect the pond. 20-30 days before stocking shrimp fry and shrimp fingerlings, drain the pond water, remove excess silt, repair the pond bank, and use 75 kg of quicklime or bleaching powder, bleaching powder essence and other drugs per acre to thoroughly clean and disinfect the pond.

3. Stocking of shrimp fry and shrimp seeds

Summer stocking mode. The first batch of juvenile shrimps hatched that year are mainly stocked in mid-to-late July. The size of the juvenile shrimps is more than 0.8 cm. 30,000 to 40,000 shrimps are stocked per mu. ~ (4) Scientific feeding

In the juvenile stage, they feed on rotifers, cladocerans, copepods and aquatic insect larvae, while in the adult stage, they feed on both animal feed and plant feed. After shrimp fry and shrimp seeds are released, fertilizers should be applied in time to improve the water quality. During the rapid growth period of crayfish from August to October, they should be fed with more bran, bean cakes and green feed, and animal feed as appropriate.

5. Daily management

Establish a pond inspection system. Patrol the pond every day and take timely countermeasures when abnormalities are found. Prevent shrimps from escaping and preventing diseases. Strengthen inspections during the flood season to prevent shrimps from escaping. Do a good job in disease prevention and pest control and enemy removal.

4. Technical plan for marine aquaculture?

Aquatic ecological aquaculture is a combination of aquatic biological systems and aquatic environments. From the perspective of ecological benefits, aquaculture is a natural regeneration process, and attention should be paid to maintaining the balance of the ecosystem. In 1986, Qian Xuesen, a famous scientist in my country, pointed out that in order to develop the "marine industry", it is necessary to make good use of the vast shallow seas and tidal flats. Using various technical means such as marine biotechnology, developing effective ecological aquaculture methods such as three-dimensional aquaculture of marine fish, shellfish and algae, fish and shrimp polyculture, shrimp and shellfish polyculture, and improving marine productivity is an effective way to promote the further development of the "marine industry".

5. Water transfer technology for marine aquaculture?

Adding and changing water is the simplest water regulation measure, but it also has its limitations. First, some aquaculture areas have inconvenient water sources and no water can be added; second, adding and changing water will flow out many bait organisms, making the water quality light, which is not conducive to the growth of filter-feeding fish. Too light water quality also reduces the amount of oxygen added by photosynthesis; third, adding and changing water can easily cause stress reactions in fish and shrimp. Therefore, in the process of intensive breeding, if it is not necessary (pollution exceeds self-purification capacity), adding and changing water is generally not used as a water regulation measure.

6. 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.

7. Seawater farming technology of Oriental shrimp?

1. Breeding facilities

The pond area should be 4-10 mu, 1-1.5 meters deep, and the slope ratio should be 1:2.5. The bottom of the pond should be flat, loam is preferred, the slope of the pond should be hard, the pond should have good water retention, and the water level should be easy to control. The water source should be sufficient and the water quality should be pollution-free. According to the pattern of high irrigation and low drainage, the water inlet and outlet channels should be built to ensure that water can be irrigated and discharged.

2. Preparation before stocking

Thoroughly clean and disinfect the pond. 20-30 days before stocking shrimp fry and shrimp fingerlings, drain the pond water, remove excess silt, repair the pond bank, and use 75 kg of quicklime or bleaching powder, bleaching powder essence and other drugs per acre to thoroughly clean and disinfect the pond.

3. Stocking of shrimp fry and shrimp seeds

Summer stocking mode. The first batch of juvenile shrimps hatched that year are mainly stocked in mid-to-late July. The size of the juvenile shrimps is more than 0.8 cm. 30,000 to 40,000 shrimps are stocked per mu. ~ (4) Scientific feeding

In the juvenile stage, they feed on rotifers, cladocerans, copepods and aquatic insect larvae, while in the adult stage, they feed on both animal feed and plant feed. After shrimp fry and shrimp seeds are released, fertilizers should be applied in time to improve the water quality. During the rapid growth period of crayfish from August to October, they should be fed with more bran, bean cakes and green feed, and animal feed as appropriate.

5. Daily management

Establish a pond inspection system. Inspect the pond every day and take timely countermeasures when abnormalities are found. Prevent shrimps from escaping and preventing diseases. Strengthen inspections during the flood season to prevent shrimps from escaping. Do a good job in disease prevention and pest control and enemy removal.

8. 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.

9. What is the seawater culture technology of Agaricus lemaneiformis?

1. Raft-type monoculture of Agaricus lemaneiformis. This is the main form of cultivation, most of which are cultivated for three consecutive crops in autumn, winter and spring, and a few are cultivated for four consecutive crops without going ashore on the raft throughout the year.

2. Raft-type rotation culture of Agaricus lemaneiformis and Kelp: Agaricus lemaneiformis is cultivated from September to December, Kelp is cultivated from December to April of the following year, and Agaricus lemaneiformis is cultivated from April to July; in a few cases, Agaricus lemaneiformis is also cultivated from July to September.

3. Raft culture of Agaricus lemaneiformis and oysters. In summer, autumn and winter, oysters are cultured in suspension, and in winter and spring, one to two crops of Agaricus lemaneiformis are cultivated after the oysters are harvested.

2. Cultivation technology of Asparagus corylifolia

1. Sea area selection.

① Bottom: All types of bottom are acceptable except for the uneven rocky reef bottom.

② Water depth: Water depth above 2.0m below the low tide line in winter.

③ Wind, waves and water currents: At present, because the aquaculture equipment is sturdy and has strong resistance to wind and waves, aquaculture can be carried out in sea areas with faster tides. Sea areas with smaller winds and waves require smooth tides.

④ Water quality: The water quality in the southern sea areas is generally fertile. As long as the seawater density in the aquaculture season is above 1.018 and there is no serious pollution from industrial wastewater, it can be used.

2. Sea area layout: It is required to be arranged in a “品” shape.

10. What are the breeding techniques for marine blue lobster?

Basic conditions for aquaculture: The seawater density in the sea area is 1.018~1.023 all year round, the pH value is 8.0, the water temperature is 18℃~32℃, the seawater transparency is above 8 meters, there is no pollution source in the surrounding coastal zone, the water depth in the aquaculture pond is more than 2 meters on average, and it can be inflowed and drained twice a day. The bottom of the pond is gravel and has natural stone reef gaps and artificial stone throwing caves. A net cage is set up outside the pond as a temporary aquaculture supporting preparation.