Cod liver oil (oil content is 20 ~ 40%) can be extracted from cod liver oil, which is rich in vitamin A and vitamin D. Cod liver oil has inhibitory effect on mycobacterium tuberculosis, and the concentration of unsaturated acid can prevent bacteria from multiplying. Cod liver oil can also kill bacteria in infected wounds.
Ointment made of cod liver oil can quickly liquefy gangrenous tissue. Cod pancreas contains a lot of insulin. 12000IU insulin can be extracted from 1kg pancreas, which has a good hypoglycemic effect and can be used to treat diabetes. Fish is rich in magnesium, which has a good protective effect on cardiovascular system and is conducive to preventing cardiovascular diseases such as hypertension and myocardial infarction.
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Living habits of cod
Cod feeds on other fish and invertebrates, with large food intake and fast growth, and can grow to 1 m in about 10 years; It is a gluttonous migratory fish and eats a lot. Because of social life, it is easy to catch, and it has been a quite famous edible fish since ancient times.
Arctic cod is a typical cold-water fish, which is distributed throughout the Arctic. When the temperature exceeds 5℃, they will disappear. It is a small and medium-sized fish, the longest of which can reach 36 cm, and it is one of the important economic fish in the Arctic.
By September every year, the Arctic cod began to migrate to the west and south, and laid eggs at sub-zero temperature in winter, which were floating eggs, and the number of eggs laid was 9000 ~ 18000. Because of the low water temperature, the incubation period is as long as 4 ~ 5 months.
The age of sexual maturity of Arctic cod is generally 4 years old, and most of them only lay eggs once in their lives, and stop eating during the spawning period. After spawning, some Arctic cod swim into estuaries or downstream rivers, and then enter the high seas.
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