when does salmon migrate?

Answer 1

Not all salmon return to their home stream at the same time of year. There are different runs of salmon that return from the sea at various times and seasons. Each run is genetically unique and specifically adapted to their stream. Some salmon migrate over 1000 miles up river to spawn.
When salmon reach their spawning grounds males and females pair off. Females look for rippling waters and clean streambed gravel that can be swept aside with broad tail strokes. The scooped-out gravel forms a depression about the shape of the female's body but twice as long. Males compete to spawn with the female. Sometimes smaller males called jacks are also present. Jack salmon are small because they migrate after only a year in the ocean but can spawn nevertheless. The female deposits some of her eggs in the redd and the male fertilizes them with a milky cloud of sperm called milt. Eggs are laid in batches deposited within the redd. Spawners guard the nest to protect it from intruders. Most Pacific salmon die within one to two weeks after spawning.

For salmon migration differential equations follow the link.

Answer 2

Salmon when born in the wild tend to return to their river of origin to spawn and ultimately die.

The migration of salmon entirely depends on where on earth they were born, and the river's location in relation to the breeding cycle.

They are in our rivers for only a few short months in each year, and they are only fit for the table when they are actually running upstream.

Answer 3

Probably when one of them says "Hang on people, I've got a great idea, lets go for a long swim"

Not sure of the month, earlier than June, I'm pretty sure

Answer 4

The go out to sea to grow up; do you know anyone you would wish that on; they return a few years later to have sex and die.

I don't think that is a good deal.

Answer 5

Not sure, but do know they try to swim up waterfalls when they are dying.

Answer 6

on the east coast,I think in june