How many years do Sturgeon breed and spawn

According to related studies, the age of female fish at spawning is about 16-29 years old, and the body weight is about 170-300kg, while the age of sexual maturity of male fish is about 9-22 years old and the body weight is about 40-125kg. The school of fish will stop eating during the spawning period, and the best hatching water temperature for fish eggs is about 20 ℃.

According to the observation of the data, the body weight of Chinese Sturgeon increases rapidly, with an average weight gain of 8-13 kg for females and 5-8 000 for males, but it takes 8-14 years from juvenile to adult to mature sexually. In the school of spawning fish, the female is about 16-29 years old and weighs 170-300 kg, while the male is about 9-22 years old and weighs 40-130 kg.

The parent Sturgeon will stop eating during reproduction, and the female parent fish will soon begin to descend to the bottom of the river after spawning. The eggs laid are sticky and mainly adhere to the gravel or rocks at the bottom of the river. When the water temperature is about 17-18 ℃, the fertilized eggs will hatch for 5-6 nights. The newly hatched larvae have a huge yolk sac, which is similar to the shape of tadpoles. As the water keeps drifting, about 12-14 days later the membrane begins to feed.

The living habits of Sturgeon

1. Chinese Sturgeon is a warm water fish, which can adapt to a wide range of water temperature. The survival water temperature of cultured Chinese Sturgeon is 0-37 ℃, and the suitable growth water temperature is 13-25 ℃, but the best growth water temperature is 20-22 ℃. The water temperature suitable for parent Sturgeon to induce spawning is about 17-24.5 ℃, while the most suitable water temperature for fish egg hatching is about 17-21 ℃. After entering the winter, when the water temperature drops to 9-6 ℃, the food intake of the Chinese Sturgeon will become very small, stop growing, and there will be weight loss.

2. The Chinese Sturgeon is a carnivorous benthic fish, and its feeding habits are quite narrow. The juvenile Chinese Sturgeon in the estuary mainly feed on the benthic fish of the genera Kun and pupa, as well as clams and krill, and stop eating during spawning. In the ocean, fish are dominant, crustaceans are secondary, and molluscs are relatively few. It mainly feeds on some slow-moving and small benthos in the river.

3. Before and after the the Beginning of Spring season, when the water temperature slowly rebounded to 10-13 degrees Celsius, a small amount of food began to feed, and the growth rate was relatively slow. In the Qingming Festival, when the water temperature reaches 15 ℃ or above, the feeding activity gradually becomes active and the growth rate is accelerated. When the water temperature is as high as 33-38 ℃, it will affect the normal activity of Chinese Sturgeon.

Fish fry have strong phototaxis in the stage of vertical swimming, and generally disappear gradually after turning to benthos. In general, ordinary light intensity has no significant effect on young Sturgeon and baby Sturgeon, but in order to avoid a sharp increase in the water temperature of the pool caused by strong light in summer, facilities such as sunshade or sunshade net should be set up on the pool.