Ways to improve fish resistance

In recent years, with the expansion of the scale of aquaculture, the increase of aquaculture production, and the deterioration of the aquaculture environment, the diseases of aquatic aquaculture have become increasingly serious, which has, to some extent, restricted the increase of aquaculture production. At present, under the conditions of artificial breeding, it is unrealistic to control and eradicate all pathogens. To control the occurrence of fish diseases, the author believes that starting from the improvement of fish resistance and supplemented by medical treatment, the effect will be better. Here are some ways to improve fish resistance for your reference.

Stocking fine varieties This is the preferred method for improving fish resistance. In recent years, with the expansion of the scale of breeding, the introduction of species between regions has increased, and artificial breeding has not renewed their parents and inbreeding for a long period of time, resulting in mixed and degraded aquaculture species, premature sexual maturity, and reduced disease resistance. Therefore, the stocked species should use high-quality, pure seedlings, and they must go to a regular and qualified nursery to purchase seedlings. To understand its mother's source, specifications, age of reproduction, etc. The high-quality varieties have fast growth, large market specifications and strong disease resistance.

Scientific stocking changes the traditional way of stocking, changing the spring to winter. In winter, the water temperature is low, fish species are caught, transported, and operations are not easy to damage the fish body. The species can be stocked early, adapt to the environment as early as possible, and eat as early as possible. After the spring water temperature rises, feeding is started immediately, so that the fish body can be quickly restored and the resistance of the fish body can be enhanced.

Rational polyculture Rational polyculture can make full use of water space, increase the output per unit area of ​​the fishing pond, and also have a good effect on the prevention of fish diseases. Parasites on different fishes are not exactly the same. Some parasites can only parasitize a certain host. Other fish are immune to it. Due to polyculture, the individual density of the fish is reduced. Polyculture of squid can use excess plankton in the pool to increase the transparency of the water body. Tilapia can ingest cyanobacteria in water and play a role in water purification. Stingrays can eat water anchors and reduce parasites. Therefore, rational polyculture has a certain role in preventing fish diseases.

Scientifically selected feeds There are many types of feed on the market, and some feeds have high protein content. Some feeds are supplemented with irritants, hormones, etc. After the fish eats, they can quickly grow in a short period of time. However, fish are prone to “rich diseases”, such as liver and gallbladder, and the resistance is reduced. The morbidity and mortality rate are high and it is difficult to cure. Therefore, high-quality feed for fish should be selected, and should be purchased from qualified and qualified feed manufacturers. Feeds must not be added to fish and human hormones. The feed must be fresh, complete in nutrients, free from pathogens, and not spoiled. According to the different growth stages of fish, the feed with appropriate protein content is selected. The content of general seedlings ranges from 14% to 18%. During the adult fish stage, the protein content is 18% to 22%. The cultured cockroaches and sturgeons may be higher. Second, we must scientifically invest in bait, we must strictly adhere to the four principles of feeding. According to the size of the fish, different types, seasons, to control the amount of feeding. Pay attention to fine and crude combination. Increase the number of feedings, the fish has no stomach, and the feed has a short residence time in the intestine. If the total amount of feed is not changed, increase the number of feedings and reduce the amount of each feeding, so that the fish is always in a state of semi-starvation and can increase Feed utilization and fish body resistance.

Reactivating water quality fish is a temperature-changing animal that lives in the water and all its metabolism is carried out in water. Good water quality, high feed utilization, fast fish growth, and strong resistance. Therefore, during the growing season, water quality should be maintained for a long period of time. The first is to change the water at a proper time and during the growing season, change the bottom water periodically to allow the sun to reach the water body as deeply as possible so that the entire water body becomes an oxygen-rich area and promote the growth of fish. The second is the scientific use of aerators and the promotion of the use of biological agents such as photosynthetic bacteria. The third is timely fertilization, which brings in nutrients through fertilization and promotes growth and reproduction of pond plankton. Based on the application of basal fertilizer, according to the principle of “timely, less applied and industriously applied, top-dressing work should be done. The fertilizer should be used after being fully fermented and disinfected.

In the course of strengthening management and aquaculture, care must be taken to prevent fish from being injured. During the middle and late stages of breeding, fish caught in a timely manner should be able to reach the market size, reduce the density in the pool, and make full use of the feed. At the same time, we must do a good job in the sanitation of the fish ponds, diligently eliminate the grassy weeds, and diligently eliminate predators and intermediate hosts. Remove the bait and dead fish in time and clean and disinfect the food field regularly.

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Flowing Process of DCS-B Packing Machine:

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Technical Data

 

Model

DCS-5B

DCS-10B

DCS-25B

DCS-50B

Metering Range

0.5-5 KG

1-10 KG

5-25 KG

10-50 KG

Bagging Speed

Over 400 bag/H

Over 360 bag/H

Over 360 bag/H

Over 240 bag/H

Accuracy

±0.2%

Working Temperature

-10 Celsius ~ +40 Celsius



Dcs-B Bagging Scale System

Dcs-B Bagging Scale System,Digital Weighing Scale,Grain Weighing Scale,Bagging Scale

SHIJIAZHUANG SYNMEC INTERNATIONAL TRADING LIMITED , https://www.seedgraincleaner.com