When does the black fish lay eggs?

At present, black fish is a popular kind of edible fish, which is not only of high nutritional value, but also has few spines, so it is suitable for both men and women, old and young, so many areas are farmed. If you want to raise black fish well, you must understand the knowledge related to spawning. When will the black fish lay eggs?

When does the black fish lay eggs?

The age of sexual maturity of black fish is 2 winter years old, the individual length is more than 30 cm and the weight is more than 0.5 kg. The number of eggs with a body length of 50 cm is 35000, that of 40 cm is 20 000, and that of 30 cm is about 10 000. Generally, the number of eggs per kilogram is 10, 100, 000 eggs, which is divided into multiple spawning shapes. The spawning season is from April to May in South China and May to July in North China. The breeding water temperature of black fish is 18-30 ℃, and the optimum temperature is 23-28 ℃. Natural spawning is mostly carried out on the banks of still water with lush aquatic plants. Before spawning, female and male parent fish together pick up aquatic plants or plant fragments to build round fish nests. It is about 50 cm in diameter and floats on the water. After the nest is built, before the calm dawn, female and male fish chase each other, estrus, and finally lay eggs on the nest. After spawning, the parent fish lurks at the bottom of the nest and protects the eggs until the seedlings grow to 4-5 cm.

Second, how big can the black fish grow?

Black fish can generally grow to 5 jin, snakehead life can reach more than 100 years, is the longevity of freshwater fish. Black fish has strong vitality and ranks first among freshwater fish.

So far, the largest snakehead has been found to be nearly 1.5 meters long (some say 1.2 meters) and weighs 15 pounds (about 7 kilograms). It is said to have been found in Russia.

Generally speaking, the spawning time of black fish varies in different areas, but most of them spawn around May. When spawning, males and females build nests first and then lay eggs.