Blackfish fry feed goldfish worms or water worms, etc.; the amount of food has a close relationship with the temperature of the water body, when the water body temperature is high in summer, snakeheads have a very large amount of food intake; when the water temperature is below 12 degrees Celsius, they will stop eating. The snakehead has a fierce temperament and lives in the bottom, belongs to carnivorous fish, and likes to live in the shallow water where the water grass is luxuriant. Blackfish meat taste delicious, nutritious, loved by consumers, is a high economic value of fish.
Expanded Information
Artificial Culture
Artificial Breeding
1, Parental Fish Cultivation: Before winter, acquire the wild and artificially bred snakeheads weighing more than 1000 grams of robustness from reservoirs as parental fish, and put them into the warming pond to cultivate them. 600 groups of parental fish, with a ratio of male to female of 1:1, and, at the same time, stocking 13.2~19.8 cm chub 100 kg, as snakeheads breeding bait. The area of the warm house was 300 square meters, and the water depth was kept at 0.6~1 meter.?
2, artificial spawning: May 11-29, selected in 7 batches of good maturity of the parent fish ****514 groups, the average tail weight of 1.6 kg, according to the 1:1 male and female fish pairing, each spawning box to put 1 group. Chorioallantoic membrane, ovulation promotion No.2 and dioctone were used as spawning catalysts.
Dispense the drugs according to the weight of each group of fish and inject them one by one, using two injection methods with an interval of 14~24 hours. After the injection of the breeding fish, the surrounding environment needs to be quiet and covered with a cover, and the water temperature is 23~25℃, after about 30 hours.
Breeding fish began to spawn one after another, breeding fish can not move eggs immediately after spawning, the use of breeding fish egg protection habits, to improve the hatch rate of eggs, after 1~2 days, the normal development of fertilized eggs fished into the hatchery pool for incubation and cultivation.
3, bait cultivation: the use of earthen ponds to cultivate natural bait, an area of 2 to 4 acres, preferably more than two ponds, fertilization cream, photosynthetic bacteria and other fertilizers, zooplankton reproduction bloom should be the same as the opening of the fry feeding time, you can judge from the water color, transparency, when the water color becomes lighter, grayish-white, or transparency increases, for the best time to fish for zooplankton.
Nutritional value
Protein
Snakehead snakehead is rich in nutrition, rich in protein, snakehead muscle contains 17.63% crude protein (higher than China's four major freshwater fishes), muscle amino acid content accounts for 77.07% of the total amount of amino acids, of which the total amount of seven essential amino acids is 29.73%.
4 kinds of fresh flavor amino acids (aspartic acid, glutamic acid, alanine, glycine) is 31.01%, which may be the reason for the fresh taste of snakehead.
The crude protein content of snakehead muscle was 17.63% (male) and 18.89% (female), and it contained 18 kinds of amino acids, among which 8 kinds of essential amino acids and flavor amino acids were found to be higher using the amino acid evaluation model.
The composition of essential amino acids in all parts of male and female snakeheads was relatively complete, with 53 points for male muscle and 50 points for female muscle. The protein content of snakehead muscle (16.94%) was higher than that of Siniperca chuatsi, grass carp, silver carp, bighead carp, Chinese soft-shelled turtle, scallop, shrimp and egg.?
Fat
Snakehead snakehead is a low-fat food with tasty meat, which is favored by many consumers and is especially suitable for nourishing and toning. Current research has found that the fat content in snakehead is low, and the feed nutrition level in aquaculture affects the growth rate of snakehead quality as follows: protein & gt; inorganic salts & gt; sugars & gt; fat, and fat is shown as the lowest.
Baidu Encyclopedia - Blackfish