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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 ...
Smoltification (also known as Parr-Smolt transformation) is a complex series of physiological changes where young salmonid fish adapt from living in fresh water to living in seawater.
The kokanee salmon (Oncorhynchus nerka), also known as the kokanee trout, little redfish, silver trout, kikanning, Kennerly's salmon, Kennerly's trout, or Walla, [2] is the non-anadromous form of the sockeye salmon (meaning that they do not migrate to the sea, instead living out their entire lives in freshwater). There is some debate as to ...
California officials will again truck millions of young salmon raised at fish hatcheries in the state's Central Valley agricultural region to the Pacific Ocean because projected river conditions ...
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.
Millions of young salmon are being trucked more than 100 miles to the San Francisco Bay to reach chillier waters, as severe drought engulfs much of California. Ordinarily, the silver salmon are ...
The colouration of young Atlantic salmon does not resemble the adult stage. While they live in fresh water, they have blue and red spots. At maturity, they take on a silver-blue sheen. The easiest way of identifying them as an adult is by the black spots predominantly above the lateral line, though the caudal fin is usually unspotted. When they ...
Salmon recruitment can be affected by beavers' dams because dams can: [67] [68] [69] Slow the rate at which nutrients are flushed from the water system; nutrients provided by adult salmon dying throughout the fall and winter remain available in the spring to newly hatched juveniles; Provide deeper salmon pools where young salmon can avoid avian ...