Yes, of course.
I believe it's an obvious problem. There's a lot of evidence to say that predation, by pinnipeds particularly, is an issue.
Where to start or how to tackle that challenge is difficult. I'm afraid I don't have a silver bullet, other than to say that something surely needs to be done and you need to start somewhere.
You've had Dr. Carl Walters propose that a focused approach in estuaries would not make for compelling results.