Salmon will return to their hatching place to spawn. A single group of salmon may travel hundreds of miles back to the river of their birthplace, hopping over waterfalls, swimming upstream until they get to the place where they hatched. They will then mate and lay eggs, beginning into being another cycle of leaving and returning to spawn. This journey is very dangerous, due to bears waiting at the top of waterfalls to catch the returning salmon.
Salmon are plentiful in these rivers when they are spawning.
Nothing.
spawning grounds are where salmon and other fish lay their eggs
redd
Bears eat salmon they catch while the salmon are traveling upstream to their spawning grounds. The 'spawning run' for most North American salmon species starts in late spring or early summer and ends in the fall, October or November, in most spawning grounds.
the mother dies
A lot, actually. They swim upstream just to lay their eggs so their offspring can survive while they die soon after spawning. You might consider renting "Blue Planet" which includes information about salmon and their life habits. They are quite interesting.
A "salmon nest" is properly referred to as a salmon spawning bed.
not quite the answer is KELT
Salmon is renewable because salmon reproduce quickly, unlike oil, which takes millions of years to reform.
Salmon Spawning
Spawning