Salmon (also known as salmon) is a kind of salty and fresh water amphibious fish with unique habits. Young fish usually hatch in fresh water with gentle flow in mountain streams. Each pair of female fish and male fish can lay about 4,000 fish eggs. Many fish eggs are eaten by other fish and birds, and the surviving fish eggs grow into young fish.

At the end of September, or early October, all mature salmon go upstream from the sea and go backwards along their route to the sea.

On the way back, they consume almost all the energy and physical strength in their bodies. Some salmon become the delicacies of other animals, others die of exhaustion before reaching their destination, and only a few surviving salmon can reach the spawning ground.

The spawning grounds are generally ponds or canyons with open water surface, gentle water flow, flat water depth and abundant sunshine. After the salmon arrived at the spawning site, regardless of fatigue, they began to dig holes in pairs at the bottom of the water to lay eggs and fertilize. After laying eggs and fertilizing, both male and female salmon died of exhaustion.

Extended data:

Each pair of salmon can lay an average of 4000 fish eggs. After a winter of bird pecking or other fish swallowing or other reasons, about 800 small fish will be hatched next spring. On the way to the lake and the sea, a lot of injuries were caused, and about 200 of them were able to reach the sea; Only about 10 can swim back after 4 years.

The competition in the living environment of wild salmon is very fierce. In order to survive, it takes three years to mature, so the muscle tissue is developed, the fat content is low, the meat is soft and firm, and there is a feeling of eating lean meat.

Salmon has been endangered many times. In the 1940s and 1950s, salmon in Thames disappeared, which was the result of human dam construction and river pollution.

In the past 100 years, uncontrolled fishing by human beings has also led to the disappearance of some precious salmon species. With the development of science and technology, the whole world has begun to cultivate salmon artificially, which not only ensures the number of wild salmon, maintains the ecological balance, but also greatly meets the human demand for it.

Zhonghua Kangwang —— The most splendid and tragic course of salmon migration.

Baidu Encyclopedia-Salmon