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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.
The life cycle of a salmon begins in a freshwater stream or river that dumps into the ocean. [2] After spending four or five years in the ocean and reaching sexual maturity, many salmon return to the same streams they were born in to spawn. There are several hypotheses on how salmon are able to do this.
Many species of salmon are anadromous and can migrate long distances up rivers to spawn Allowing fish and other migratory animals to travel the rivers can help maintain healthy fish populations. Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ...
Oct. 1—TRAVERSE CITY — They've started late, and warm water in Grand Traverse Bay has them slow to head up the Boardman River, but the salmon spawn has started in earnest, and the Department ...
Chum salmon. Chum salmon are also named dog or calico salmon. The species develop large, canine-like teeth during spawning, and typically grow to 10-15 pounds but can be as large as 33 pounds.
The hatchery, located off Hazel Avenue in the eastern portion of the county, opens its ladder annually for salmon and steelhead trout as they journey upriver to spawn.
Most Atlantic salmon follow an anadromous migration pattern, [2] in that they undergo their greatest feeding and growth in saltwater; however, adults return to spawn in native freshwater streams where the eggs hatch and juveniles grow through several distinct stages. [citation needed] Atlantic salmon do not require saltwater.
Pink salmon in their native range have a strict two year life cycle, thus odd and even-year populations do not interbreed. In the state of Washington, pink salmon runs occur on odd years. [12] Adult pink salmon enter spawning streams from the ocean, usually returning to the stream where they originated.