CATDOLL : CATDOLL: Summer flower fish fry fish farming

Fish farming with summer flower fry

The big belly may be because the body rots quickly in summer. The fish itself is small and fish is high in protein, so it rots quickly, so the belly is big. This is the case when the fish has been dead for a long time.

I don't know what kind of fish you put in, if there is a large-scale death, it is very likely due to lack of oxygen. Death due to lack of oxygen usually does not exceed three days, because the dead fish will sink to the bottom of the lake and ferment, and the most dead fish will die on the second day. (Generally, if there is death due to lack of oxygen, the first to die is in the following order: bream-silver carp-grass carp-bighead carp-crucian carp). If every type of fish dies, it should be due to lack of oxygen, and it is very serious. Experienced fish farmers know that if even crucian carp dies due to lack of oxygen, then there are basically no fish in the fish pond, because it is the most resistant to lack of oxygen.

Another possible cause of death is bacterial disease. The number of deaths will increase day by day. You can use bleaching powder (chlorine content is 30%), generally use 20 grams per cubic meter of water, and immediately sprinkle it evenly in the pool after it is fully dissolved. Bacterial diseases are caused by parasites and bacteria in the water. You can distinguish them by looking at the appearance of fresh dead fish. Dead fish with bacterial diseases have the following symptoms: rotten gills, rotten tails, erect fish scales, and congestion of the body.

If parasites are not removed in time, they can also cause bacterial complications. Use trichlorfon to remove them (100 grams per acre). Fish with parasites will splash at night and suffer from hypoxia earlier.

Generally, there are 2,000 to 5,000 fry of each species per acre, and oxygenation equipment is required.

Do not feed too much. Uneaten feed will cause water quality to deteriorate and increase fish diseases.

I have some experience in contracting fish ponds before, I hope it will be useful.

What are the benefits of eating fish to the body?

Fish is rich in nutritional value

The protein content of fish is about 15-24%, so fish is a good source of protein, and the absorption rate of these proteins is very high, about 87-98% will be absorbed by the human body. The fat content of fish is much lower than that of livestock meat, and fish contains very special ω-3 fatty acids, such as EPA (Ecosapenoic acid, eicosapentaenoic acid) and DHA (Decosahexanoid acid, docosahexaenoic acid).

In addition, fish oil is rich in vitamins A and D, especially in fish liver. Fish also contains water-soluble vitamins B6, B12, niacin and biotin. Fish also contains minerals. The most noteworthy ones are anchovies or sardines, which are a good source of calcium if eaten with bones. Marine fish are rich in iodine. Other minerals such as phosphorus, copper, magnesium, potassium, iron, etc. can also be taken in when eating fish.

DHA is a key element in boosting brain power

Why do we often hear that eating fish can make you smarter? There is actually a scientific basis for this. The DHA contained in fish is mainly found in the brain, retina and nerves in the human body. DHA can maintain the normal function of the retina. Infants especially need this nutrient to promote healthy vision development. DHA is also of great benefit to the development of the human brain and intelligence, and is an indispensable nutrient for the growth of the nervous system.

Most seafood contains DHA, but deep-sea fish such as salmon, mackerel, sardines, saury, and bluefin bream are rich in DHA, especially in the fat tissue near the fish's eyeballs. Although cod, milkfish, and mullet have high oil content, their ω-3 fatty acid content is not very high; tuna, yellow croaker, sea bass, and hairtail have even lower ω-3 fatty acid content.

DHA is very important for the rapid brain development of fetuses and infants. Infants cannot produce enough DHA for brain cell and nerve development. They must obtain DHA from breast milk or infant formula. Breast milk is rich in DHA. Babies fed with breast milk have better visual development and intellectual cognitive development than babies fed with infant formula. The longer the baby is breastfed, the higher the IQ of the baby will be, and the better the academic performance will be when they grow up. Therefore, breast milk is the best food for babies.

However, if the mother does not supplement enough DHA-rich foods during pregnancy or breastfeeding, the body will not contain enough DHA, and the DHA concentration in the infant may be insufficient. Therefore, pregnant and breastfeeding women should consume more deep-sea fish to increase the amount of DHA in the body during pregnancy, or pass it to the baby through breastfeeding. If it is inconvenient or you don’t like to eat fish, you may have to consider taking capsule-shaped DHA supplements. When the mother is unable to or stops breastfeeding, it is advisable to add DHA to the infant’s diet, such as choosing formula milk powder with added DHA, or using more fish to make supplementary food. However, some infant formula milk powders do not contain DHA, so you should pay attention to the label when purchasing.

People with Alzheimer's disease have an average of 30 to 40 percent less DHA in their blood than normal people. People who eat fish regularly are less likely to have their brains deteriorate, and their symptoms of Alzheimer's disease can even be improved. Even for healthy people, a lack of DHA can cause reduced memory and learning abilities.

Medical evidence shows that eating fish regularly has many benefits

Fish is rich in protein, which can help infants, children and teenagers grow and develop, and can also help recovery and healing when they are sick or have wounds. In addition, fish protein has shorter muscle fiber structure and less connective tissue, so fish tastes more delicate and tender than other animal meats, and is easier to digest, making it very suitable for infants and the elderly. Fish contains less fat than animal meat, so the calories are lower than animal meat.

Medical research has found that the Eskimos have a very low rate of cardiovascular disease. It turns out that this is because they have a lot of marine fish rich in EPA and DHA in their diet. A survey in Japan also found that residents of coastal fishing villages have a lower rate of cardiovascular disease than farmers inland. The two special ω-3 fatty acids EPA and DHA in fish can lower blood lipids, especially triglycerides and low-density lipoprotein cholesterol (bad cholesterol), and make platelets less likely to aggregate, thereby preventing cardiovascular diseases and strokes caused by thrombosis, and protecting the heart.

A study in Finland found that people who eat fish less than once a week have a higher rate of mild depression than those who eat fish regularly, because EPA and DHA in fish can eliminate anxiety and prevent schizophrenia. In short, eating fish can make people healthier and smarter.