zwierzęta: Salmon run

Evidence: 49 • authority: 72

A salmon run is an annual fish migration event where many salmon 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. After spawning, most Atlantic salmon and all species of Pacific salmon die, and the salmon life cycle starts over again with the new generation of hatchlings. Salmon are anadromous, spending their juvenile life in rivers or lakes, and then migrating out to sea where they spend adult lives and gain most of their body mass. When they reach sexual maturity, the adults return to the upstream rivers to reproduce. Usuall…

Evidence: 43 • authority: 72

Salmon (; pl.: salmon) are any of several commercially important species of ray-finned fish that can live in either freshwater or saltwater from the genera Salmo and Oncorhynchus of the family Salmonidae, native to tributaries of the North Atlantic (Salmo) and North Pacific (Oncorhynchus) basins. Salmon is a colloquial or common name used for fish in this group, but is not a scientific name. Other closely related fish in the same family include trout, char, grayling, whitefish, lenok and taimen, all coldwater fish of the subarctic and cooler temperate regions with some sporadic endorheic populations in Central Asia. Salmon are typically anadromous: they hatch in the shallow gravel beds of f…

Evidence: 42 • authority: 92

Shifting stage-specific constraints on productivity shape recovery potential for Yukon River Chinook salmon.. Identifying key life history periods in which population productivity is constrained represents a persistent challenge in conservation and natural resource management. For species with complex life cycles, such as Pacific salmon (Oncorhynchus spp.), population dynamics may be shaped by interactions between natural and anthropogenic impacts occurring across multiple habitats and life history stages. In such cases, a stage-structured modeling approach is useful for identifying key life history periods and processes therein acting to drive realized abundance trends. Here, we develop an…

Evidence: 42 • authority: 72

The Chinook salmon (Oncorhynchus tshawytscha) is the largest and most valuable species of Pacific salmon. Its common name is derived from the Chinookan peoples. Other vernacular names for the species include king salmon, quinnat salmon, tsumen, spring salmon, blackmouth, and tyee salmon. The scientific species name is based on the Russian common name chavycha (чавыча). Chinook are anadromous fish native to the North Pacific Ocean and the river systems of western North America, ranging from California to Alaska, as well as Asian rivers ranging from northern Japan to the Palyavaam River in Arctic northeast Siberia. They have been introduced to other parts of the world, including New Zealand a…

Evidence: 37 • authority: 80

Evidence: 37 • authority: 80

Evidence: 36 • authority: 92

Enter Salmon: Trophic risk mediates riverine barrier-crossing behaviours of parr.. Freshwater biota are highly threatened by global stressors, among which fragmentation by artificial barriers has gained increasing attention in recent years. Barriers limit the movements of native species, notably the migrations of keystone fish, such as Atlantic salmon (Salmo salar), with ecological and socio-economic consequences. The severity of barrier impacts on salmon smolt and adult migratory stages has widely overshadowed the effects on juvenile river-resident stages, despite the importance of habitat availability during these years. We present the first study of crossing behaviours displayed by salmo…