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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.
Several Pacific salmon (Chinook, coho and Steelhead) have been introduced into the US Great Lakes, and have become potamodromous, migrating between their natal waters to feeding grounds entirely within fresh water. Life cycle of anadromous fish. From a U.S. Government pamphlet. (Click image to enlarge.)
They are not a different species from the sea-run Atlantic salmon but have independently evolved a freshwater-only life cycle, which they maintain even when they could access the ocean. Chinook salmon (Oncorhynchus tshawytscha) are also known in the United States as king salmon or "blackmouth salmon", and as "spring salmon" in British Columbia ...
California and the life cycle of salmon have been linked for centuries, beginning when only indigenous people lived in the state. ... The number of fall-run Chinook that made it upstream to spawn ...
In areas that are open for retention of coho salmon in the Willamette River basin upstream of Willamette Falls, anglers with a valid 2024 Oregon two-rod validation may fish with two rods including ...
This section details the stages and the particular names used for juvenile salmon. Sac fry or alevin – The life cycle of salmon begins and usually also ends in the backwaters of streams and rivers. These are their spawning grounds, where salmon eggs are deposited for among the gravels of stream beds. The salmon spawning grounds are also the ...
The fish run is so big in part because of better management: Dam operators on the Canadian side of the border have been using a computer model since 2004 that helps them improve water releases ...
Atlantic salmon do not require saltwater. Numerous examples of fully freshwater (i.e., "landlocked") populations of the species exist throughout the Northern Hemisphere, [2] including a now extinct population in Lake Ontario, which has been shown in recent studies to have spent its entire life cycle in the watershed of the lake. [22]