If Atlantic salmon may swim upstream and spawn multiple times in their life, why aren’t there millions more Atlantic salmon than Pacific salmon that die after spawning in freshwater?

Question

Am I missing something here? — I’ve seen the salmon runs in Alaska and they are incredible. Yet I’ve never seen any footage of anything like it concerning Atlantic Salmon.

In: Biology

Answer 1

Mostly because almost all of the rivers that Atlantic salmon traditionally spawned in can no longer support them or their fry because of dams and pollution.

We also way overfished the population, and now it’s vanishingly small.