CATDOLL : CATDOLL: What is the driving force behind salmon migration?

The motivation for salmon migration comes from the need for reproduction. Due to the influence of physiological requirements, genetics and external environmental factors, they cause periodic directional back and forth movement. Migration is a characteristic of fish formed during the process of system development. It is a long-term adaptation of fish to the environment. It can enable the population to obtain more favorable living conditions and better reproduce offspring.

salmon:

Salmon (Oncorhynchus), also known as salmon, salmon, salmon, belongs to the class of bony fish, order of Salmoniformes, genus Salmon, and is mainly distributed in the waters where the Atlantic Ocean, Pacific Ocean, and Arctic Ocean meet. It is a cold-water highly migratory fish and is known as the "King of the Ice Sea" by the international food industry. Studies have shown that both tuna and salmon are delicious, nutritious, and rich in bioactive substances such as EPA and DHA. There are more than 30 commercially valuable varieties of salmon, and the most common ones are currently two types of trout and four types of salmon.