CATDOLL : CATDOLL: Silver Snowfish Farming

Silver snow fish farming

Nutritional information of salmon: Nutrient content (per 100 grams) Calories (kcal) 139.00 Carbohydrates (g) 0.00 Fat (g) 7.80 Protein (g) 17.20

Salmon is rich in unsaturated fatty acids, which are essential for the normal physiological function of cells and are also precursors for the synthesis of prostaglandins and thromboxanes. Maintaining a normal level of unsaturated fatty acids in the human body can increase the activity of brain cells and increase high-density lipoprotein cholesterol, thereby preventing and treating cardiovascular diseases.

Salmon is also one of the raw materials for making cod liver oil in medicine. Cod liver oil is rich in vitamin D. Vitamin D can improve the body's absorption of trace primary colors such as calcium and phosphorus, and is especially suitable for young people who are growing and developing. Some people who work in the clothing industry for a long time should have little chance to be exposed to sunlight, and should also supplement vitamin D in time. Salmon is suitable for any group of people, young and old, especially for patients with cardiovascular disease, long-term mental workers and students. Eating more salmon can supplement the body with various nutrients it needs, and can also relieve the discomfort caused by long-term work pressure.

The nutritional value of salmon also occupies a "golden ratio" of the ideal diet, that is, the ideal ratio of vitamin E to polyunsaturated fatty acids in food is 0.4, while the ratio of salmon is as high as 0.73, which shows its high nutritional value and balanced nutritional distribution. A Swedish scientist confirmed that women who eat salmon once a week are much less likely to suffer from kidney cancer than other people. If you eat salmon regularly, the chance of suffering from kidney cancer is 74% lower than those who do not eat salmon. The omega-3 unsaturated fatty acids extracted from salmon can eliminate active biological substances that damage skin collagen and skin moisturizing factors, and play an anti-wrinkle effect.

The omega-3 unsaturated fatty acids contained in salmon can reduce the triglyceride content in human blood, increase high-density lipoprotein cholesterol, enhance blood vessel elasticity, effectively lower blood lipids and blood cholesterol, and are very effective in preventing and treating cardiovascular diseases and Alzheimer's disease.

In Europe, cod is called "the nutritionist on the table", and the French directly call it "liquid gold", which shows its high nutritional value. Cod has thick meat, few bones and delicious taste. Nutrition experts point out that its protein content is very high, and its fat content is extremely low to less than 0.5%. It also contains A, D, E, DHA and high-grade protein and multiple vitamins. It is an important part of the human retina, and is also recognized as an important nutrient for improving memory and promoting the development of children's brain, which makes humans strengthen their physical fitness. In France, there is a "Cod Culture Festival" every year, and restaurants specializing in cod can be seen everywhere in the city. It is said that there are at least 365 ways to cook cod in the local area, among which the most famous is "steamed cod". The method is to put potatoes (potatoes) and onion slices on the cod, then put it in a steamer and steam it, and finally decorate it with boiled eggs and black olives. Cod is low in fat, high in protein, and has few bones. It is a nutritious food suitable for all ages. Cod has the advantages of high nutrition, low cholesterol, and easy absorption by the human body. Cod fish fat contains globulin, albumin and phosphorus nucleoprotein, as well as various amino acids necessary for children's development. The ratios are very close to the amount required by children, and it is easily digested and absorbed by humans. It also contains unsaturated fatty acids, calcium, phosphorus, iron, B vitamins, etc. Cod fish fat contains globulin, albumin and phosphorus nucleoprotein, as well as various amino acids necessary for children's development. The ratios are very close to the amount required by children, and it is easily digested and absorbed by humans. It also contains unsaturated fatty acids, calcium, phosphorus, iron, B vitamins, etc. Cod fish is low in fat, high in protein, and has few bones. It is a nutritious food suitable for all ages. Cod fish has the advantages of high nutrition, low cholesterol, and easy absorption by the human body.

Freshwater cod breeding technology, what is the suitable temperature

1. Pond treatment: 15 days before stocking, pour new water into the pond, and then use 80-100kg of quicklime per mu to sprinkle the whole pond. 2. Stocking density: From spring to summer, stock 150,000 to 200,000 spring fingerlings per mu, from summer to autumn, stock 15,000 to 30,000 fingerlings per mu, and raise 200-300 silver carp at the same time, from autumn to commercial fish, stock 1,800 to 2,300 autumn fingerlings per mu, and raise silver carp and bighead carp at the same time.

1. Freshwater cod breeding technology

1. Pond

(1) Before stocking, drain the water from the pond and expose it to the sun for 2-3 days.

(1) About 15 days before stocking, fill the pond with new water to a depth of 0.3m, then sprinkle 80-100kg of quicklime per acre of pond, or sprinkle 15-18kg of bleaching powder slurry per acre of pond.

(2) About 2-3 days after disinfection, apply 200-300 kg of decomposed chicken manure per acre of pond.

2. Stocking density

(1) From water flower to summer flower, 150,000 to 200,000 water flower fingerlings are stocked per acre of pond. After about 30 days of breeding, 120,000 to 160,000 summer flower fingerlings (about 3-4 cm) can be obtained.

(2) From summer to autumn, 15,000 to 30,000 fingerlings are stocked per mu of pond, and 200 to 300 silver carp of the same age are raised at the same time. After about 90 days of breeding, 14,000 to 28,000 autumn fish fingerlings (80-100g/fish) can be obtained.

(3) From autumn flake fingerlings to commercial fish, 1800-2300 autumn flake fingerlings are stocked per acre of pond, along with 15-20 silver carp and 10-15 bighead carp.

3. Feeding

(1) From the blooming stage to the summer blooming stage, the protein content of the feed is controlled at about 42%. From the summer blooming stage to the autumn flake fingerling stage, the protein content of the feed is controlled at about 38%. From the autumn flake fingerling stage to the commercial fingerling stage, the protein content of the feed is controlled at about 35%.

(2) When the water temperature is around 15°C, the daily feed amount is 0.2-0.3% of the fish body weight. When the water temperature is 16-20°C, the daily feed amount is 0.6-1.2% of the fish body weight. When the water temperature is 21-25°C, the daily feed amount is 1.2-3% of the fish body weight. When the water temperature is 26-30°C, the daily feed amount is 3-6% of the fish body weight.

(3) From the water flower to summer flower stage, feed 3-4 times a day, and it is best if the fish eat all the food within 50 minutes after feeding. From summer flower to autumn flake fingerlings, feed 2-3 times a day, and it is best if the fish eat all the food within 60 minutes after feeding. From autumn flake fingerlings to commercial fingerlings, feed 2 times a day, and it is best if the fish eat all the food within 60 minutes after feeding.

(4) If feeding is done more than twice a day, the amount fed in the morning should account for about 40-45% of the daily feeding amount.

2. What is the suitable temperature for freshwater silver cod?

1. Freshwater silver cod (large scale) can survive in an environment of 1-30°C. The suitable water temperature for growth is 18-27°C, and the optimal water temperature for growth is 24-27°C.

2. When the water temperature is below 15°C, freshwater silver cod almost stop eating and gather in the deep part of the pond to hibernate (during the winter, the water temperature should be kept above 4°C).

3. Freshwater silver cod is a salt-alkali tolerant farmed fish. When the salinity in the water is lower than 3.2‰ and the alkalinity is lower than 14.32mmol/L, the embryonic development of freshwater silver cod is not affected. When the salinity in the water is lower than 5.1% and the alkalinity is lower than 14.32mmol/L, the fry of freshwater silver cod are not affected.

4. During breeding, it is recommended that the salinity of the breeding water should not exceed 6‰ and the alkalinity should not exceed 25.1mmol/L.

1. Pond treatment: 15 days before stocking, pour new water into the pond, and then use 80-100kg of quicklime per mu to sprinkle the whole pond. 2. Stocking density: From spring to summer, stock 150,000 to 200,000 spring fingerlings per mu, from summer to autumn, stock 15,000 to 30,000 fingerlings per mu, and raise 200-300 silver carp at the same time, from autumn to commercial fish, stock 1,800 to 2,300 autumn fingerlings per mu, and raise silver carp and bighead carp at the same time.

1. Freshwater cod breeding technology

1. Pond

(1) Before stocking, drain the water from the pond and expose it to the sun for 2-3 days.

(1) About 15 days before stocking, fill the pond with new water to a depth of 0.3m, then sprinkle 80-100kg of quicklime per acre of pond, or sprinkle 15-18kg of bleaching powder slurry per acre of pond.

(2) About 2-3 days after disinfection, apply 200-300 kg of decomposed chicken manure per acre of pond.

2. Stocking density

(1) From water flower to summer flower, 150,000 to 200,000 water flower fingerlings are stocked per acre of pond. After about 30 days of breeding, 120,000 to 160,000 summer flower fingerlings (about 3-4 cm) can be obtained.

(2) From summer to autumn, 15,000 to 30,000 fingerlings are stocked per mu of pond, and 200 to 300 silver carp of the same age are raised at the same time. After about 90 days of breeding, 14,000 to 28,000 autumn fish fingerlings (80-100g/fish) can be obtained.

(3) From autumn flake fingerlings to commercial fish, 1800-2300 autumn flake fingerlings are stocked per acre of pond, along with 15-20 silver carp and 10-15 bighead carp.

3. Feeding

(1) From the blooming stage to the summer blooming stage, the protein content of the feed is controlled at about 42%. From the summer blooming stage to the autumn flake fingerling stage, the protein content of the feed is controlled at about 38%. From the autumn flake fingerling stage to the commercial fingerling stage, the protein content of the feed is controlled at about 35%.

(2) When the water temperature is around 15°C, the daily feed amount is 0.2-0.3% of the fish body weight. When the water temperature is 16-20°C, the daily feed amount is 0.6-1.2% of the fish body weight. When the water temperature is 21-25°C, the daily feed amount is 1.2-3% of the fish body weight. When the water temperature is 26-30°C, the daily feed amount is 3-6% of the fish body weight.

(3) From the water flower to summer flower stage, feed 3-4 times a day, and it is best if the fish eat all the food within 50 minutes after feeding. From summer flower to autumn flake fingerlings, feed 2-3 times a day, and it is best if the fish eat all the food within 60 minutes after feeding. From autumn flake fingerlings to commercial fingerlings, feed 2 times a day, and it is best if the fish eat all the food within 60 minutes after feeding.

(4) If feeding is done more than twice a day, the amount fed in the morning should account for about 40-45% of the daily feeding amount.

2. What is the suitable temperature for freshwater silver cod?

1. Freshwater silver cod (large scale) can survive in an environment of 1-30°C. The suitable water temperature for growth is 18-27°C, and the optimal water temperature for growth is 24-27°C.

2. When the water temperature is below 15°C, freshwater silver cod almost stop eating and gather in the deep part of the pond to hibernate (during the winter, the water temperature should be kept above 4°C).

3. Freshwater silver cod is a salt-alkali tolerant farmed fish. When the salinity in the water is lower than 3.2‰ and the alkalinity is lower than 14.32mmol/L, the embryonic development of freshwater silver cod is not affected. When the salinity in the water is lower than 5.1% and the alkalinity is lower than 14.32mmol/L, the fry of freshwater silver cod are not affected.

4. During breeding, it is recommended that the salinity of the breeding water should not exceed 6‰ and the alkalinity should not exceed 25.1mmol/L.