They are opportunistic animals and so part of the problem is that there is now enough of a population that they're in places where they might ordinarily have appeared seasonally when they know that the smolts are coming out or the adults are coming in. Now they are there all year round and then, of course, they are there in greater numbers at those times and places where they understand that there will be salmon there for them to consume.
On April 24th, 2023. See this statement in context.