Pacific salmon * * * Dividend salmon, silver salmon, dog salmon, large scale salmon, fine scale salmon and cherry salmon. Sockeye salmon is distributed in the waters from the White Collar Strait to the Columbia River in Japan and North America. Silverfish are distributed in waters from the White Collar Strait to Monterey Bay in Japan and Mexico. Dog salmon are distributed in the waters from mackenzie river, Canada and Lena River in Russia to Japan in the south of the Arctic Circle. Salmon are distributed in the waters from yukon river in the United States and Canada to the coast of China and the Sacramento River in the United States. Salmon are distributed in the Klamath River from the Arctic to Japan and the United States. The salmon is distributed in the Pacific Ocean near Japan.
Atlantic salmon are distributed in the estuaries of rivers on both sides of the North Atlantic. The average weight of adult Atlantic salmon is about 4.5 kg, and that of large salmon is about 10 kg. Large salmon weighing 22-36 kg is also common. The average weight of dog salmon is about 4.5 ~ 5.5 kg; The average weight of silver salmon is about 3 ~ 4.5 kg; Red salmon weighs about 2 ~ 3 kg; Cherry salmon weighs about 1.3 ~ 2.7 kg.
Pacific salmon live in the sea most of the time, and adult salmon swim to the river to lay eggs. At this time, the female salmon dug a hole in the gravel at the bottom of the river, gave birth to the fertilized egg with the cooperation of the male salmon, and then covered the fertilized egg with sand. Pacific salmon will die soon after spawning. In contrast, the fate of many Atlantic salmon is much better. After laying eggs, they will return to the sea safely and come back to lay eggs in a year or two. Some of them can lay eggs three or four times in their lifetime. Salmon usually lay eggs in late summer and early autumn, and eggs hatch in late winter. Time depends on the water temperature, ranging from 60 days to 200 days. Before young fry can swim for food, they mainly rely on the nutrition in egg yolk to maintain their lives. The salmon fry swam into the sea as soon as they were born; The dog salmon fry stayed in the river for several weeks; Silver salmon fry live in the river for a whole year before swimming into the sea; The salmon fry produced in the lake may live in the lake for 1 ~ 5 years and then migrate to the sea.
Salmon living in the sea are usually silver-gray on both sides. During the breeding season, the colors of various salmon will change differently. Male salmon have hooked jaws. The change of male Pacific salmon to breeding season is particularly prominent. When spring or autumn comes, they go upstream, and basically eat nothing except touching the bait occasionally. They lay eggs at the seaside. On the other hand, dog salmon and scaly salmon have to go back to yukon river to spawn at the source of 3,200 kilometers. Driven by instinct, these migrating salmon will bravely fight against rapids in order to reach their spawning grounds, even without fear of falling waterfalls, and will never stop until they reach their destination. Even the salmon living in the deep water of the inner lake will go upstream along the river flowing into the lake to find the source to lay eggs in order to have children.
Although Atlantic salmon has commercial value in many areas, it mainly belongs to people's favorite fishing fish The fishing value of Pacific salmon is greater than that of Atlantic salmon, with an annual catch of millions of kilograms, half of which is salmon with fine scales.
Red salmon, silver salmon and large-scale salmon are several endangered animals.