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A grizzly bear ambushing a jumping salmon during an annual salmon run. A salmon run is an annual fish migration event where many salmonid species, which are typically hatched in fresh water and live most of their adult life downstream in the ocean, swim back against the stream to the upper reaches of rivers to spawn on the gravel beds of small creeks.
These salmon hatch in small freshwater streams. From there they migrate to the sea to mature, living there for two to six years. When mature, the salmon return to the same streams where they were hatched to spawn. Salmon are capable of going hundreds of kilometers upriver, and humans must install fish ladders in dams to
The world's largest producer and market supplier of Chinook salmon is New Zealand. In 2009, New Zealand exported 5,088 tonnes (5,609 short tons) of Chinook salmon, marketed as king salmon, equating to a value of NZ$61 million in export earnings. For the year ended March 2011, this amount had increased to NZ$85 million.
Now, ocean salmon fishing season is set to be prohibited this year off California and much of Oregon for the second time in 15 years after adult fall-run Chinook, often known as king salmon ...
The result was a release of about 500,000 juvenile salmon last week. The pressure is on those salmon to reach the ocean so they can help grow the population over the next couple of years.
Heavy water flows during the winter have eroded the foundation of the weir and piers, prompting major repairs in 1963, 1982, 1986, and 1999. Erosion holes in the weir were a major problem because they allowed adult Chinook salmon to pass through the weir, defeating its purpose and preventing the salmon from reaching the Hatchery's fish ladder ...
Some species such as Pacific salmon migrate to reproduce; every year, they swim upstream to mate and then return to the ocean. [8] Temperature is a driving factor of migration that is dependent on the time of year. Many species, especially birds, migrate to warmer locations during the winter to escape poor environmental conditions. [9]
Aug. 23—The California Department of Fish and Wildlife (CDFW) announced on Wednesday that it has completed the release of about 23 million fall-run Chinook salmon raised at its four Central ...