Pacific salmon * * * Dividends 6 kinds of salmon, silver salmon, dog salmon, large-scale salmon, fine-scale salmon and cherry salmon. Red salmon is distributed in the waters from the White Collar Strait to Japan and the Columbia River in North America. Silver salmon is distributed in the waters from the White Collar Strait to Japan and Monterey Bay in Mexico. Dog salmon is distributed in the waters from mackenzie river in Canada and Lena River in Russia to Japan in the south of the Arctic Circle. Salmon is 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 is distributed from the Arctic to Japan and the Kramas River in the United States. Cherry salmon is distributed in the Pacific Ocean near Japan.
Atlantic salmon are distributed in the estuary areas of rivers on both sides of the North Atlantic. The average weight of adult Atlantic salmon is about 4.5 kg, the average weight of large-scale salmon is about 10 kg, and large-scale salmon weighing 22 ~ 36 kg is also very 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 kilograms; Cherry salmon weighs about1.3 ~ 2.7 kg.
Pacific salmon live in the sea most of the time, and adult salmon swim to rivers to lay eggs. At this time, the female salmon dug a hole in the gravel at the bottom of the river, laid fertilized fish eggs with the cooperation of the male salmon, and then covered the fertilized eggs 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 they can come back to lay eggs one or two years later. Some of them can lay eggs three or four times in their lives. Salmon usually spawn in late summer and early autumn, and the eggs hatch in late winter. The time depends on the temperature of water, ranging from 60 to 200 days. Before the young fry can swim for food, they mainly rely on the nutrition in the yolk to maintain their lives. The salmon fry swam into the sea as soon as they were born; Dog salmon fry stay in the river for several weeks; Silver salmon fry live in the river for a whole year before swimming into the sea; The red salmon fry produced in lake water may live in lake water1~ 5 years later and move to the sea.
Salmon that inhabit the sea are usually silver-gray on both sides. In the breeding season, the colors of all kinds of salmon will change differently. Male salmon grow hooked jaws. The change from male Pacific salmon to breeding season is particularly prominent. When spring or autumn comes, they go up the river and basically eat nothing except occasionally touching the bait. They lay their eggs near the sea. On the other hand, the dog salmon and the scaly salmon have to go up the yukon river River to spawn at the source of 3,200 kilometers. Driven by instinct, these migratory salmon will fight the rapids bravely in order to reach their spawning grounds, even without fear of the descending waterfalls, and will never stop until they reach their destination. Even the salmon living in the deep water of the inner lake, in order to have children, will go upstream along the river flowing into the lake to find the source to lay eggs.
Although Atlantic salmon have commercial value in many areas, they mainly belong 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.