Protein of catfish contains 8 kinds of amino acids necessary for human body, which is completely protein and easy to be digested and absorbed by human body. Catfish is a good nourishing food with low fat content and many trace elements. Fish is tender and easy to digest, with few bone spurs, which is especially suitable for the elderly, women and children.
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Reproductive characteristics of catfish
Catfish can reach maturity at the earliest age of 1 day, but only some of them grow faster (the smallest mature catfish is: female fish is 22.4cm long and weighs 51g; ; The male fish is 17.8cm long and weighs 34g), accounting for about 50% of the population, and all the second-year-old individuals are sexually mature. In natural environment, the breeding season is from April to July, and the suitable water temperature for spawning is 9~30℃.
Catfish lay eggs in a special type, and the development of oocytes in their ovaries is synchronous, but they are not produced in batches, but in multiple times. Under artificial conditions, a parent fish can lay eggs 3-4 times a year, with an average of about 2000 eggs each time, and the total number of eggs laid each year is slightly lower than the number of pregnant eggs. The diameter of eggs laid in the late stage of reproduction is slightly smaller than that laid in the early stage.
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