Chinook salmon


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Related to Chinook salmon: chum salmon

Chinook salmon

a Pacific salmon, Oncorhynchus tschawytscha, valued as a food fish

Chinook Salmon

 

(Oncorhynchus tshawytscha), also king salmon or black salmon, a fish of the genus Oncorhynchus, comprising the Pacific salmon. The Chinook salmon differs from other salmon in the large number of gill rays, which number 15 to 19. The back is covered by tiny, roundish black spots, as are the dorsal and caudal fins. The Chinook salmon is the largest of all the Pacific salmon. The body length of the representatives caught off Kamchatka averages 90 cm, and the weight 8–10 kg; some have been known to weigh more than 50 kg. The Chinook salmon is distributed in the northern part of the Pacific Ocean, inhabiting areas along the coast of North America, from Alaska to California, and areas along the coast of Asia, from the Anadyr’ River to Amur Bay.

The Chinook salmon attains sexual maturity at three to seven years of age. It spawns in July and August on the Kamchatka Peninsula; in the rivers of North America it also spawns in the autumn and winter. The fish enter the rivers in the spring, swimming far upstream. Fecundity is 4,200 to 20,000 eggs, which are large, nearly the size of the eggs of the chum salmon (O. keta). The fry live in rivers from the age of three or four months to one to two years of age.

A very valuable commercial fish, the Chinook salmon is bred and acclimatized.

REFERENCES

Nikol’skii, G. V. Chastnaia ikhtiologiia, 3rd ed. Moscow, 1971.
Zhizn’ zhivotnykh, vol. 4, part 1. Moscow, 1971.
Smirnov, A. I. Biologiia, razmnozhenie i razvitie tikhookeanskikh lososei. Moscow, 1975.

A. I. SMIRNOV

chinook salmon

[shə¦nu̇ ′sa·mən]
(vertebrate zoology)
Oncorhynchus tshawytscha. The Pacific's largest salmon, possibly exceeding 46 kilograms (100 pounds) at maturity, often spawns in tributaries located a considerable distance from the ocean. Also known as king salmon.
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A sub yearling fall-run juvenile Chinook salmon from the Mokelumne River fish hatchery was attached to the distal end of the fluorocarbon leader by means of a loop threaded through the mouth and operculum.
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Under a regulated flow regime, spring-run chinook salmon migrate to the bedrock reaches at the base of large water-supply dams in the spring and summer and hold in pools supplied with cold water releases from the bottom of reservoirs.
Chinook salmon eggs were obtained from Big Qualicum River Hatchery (BC), brought to the West Vancouver Laboratory (Fisheries and Oceans Canada, West Vancouver, BC) and placed in incubation trays, supplied with well water at 10[degrees]C.
Predatory coho and chinook salmon were stocked into Lake Huron in the 1960s to control explosive populations of two other exotic species, the alewife and the rainbow smelt.
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The Reach also supports the last healthy native population of Pacific fall chinook salmon in the Columbia River Basin.
This paper extends the standard travel cost method (TCM) to develop estimates of the economic value of recreational chinook salmon fishing on the Gulkana River, Alaska, under existing and hypothetical fishery management conditions.
The Snake River sockeye salmon was recently listed as endangered, and the Snake River chinook salmon as threatened under the Endangered Species Act.