A steams lack of nutrients, or lack of dead spawners isn't in it's self a factor for recovery, but rather it's a result of other way bigger limiting factors.
To be more clear, you can stuff as many carcasses as you see fit in any stream, but until the real limiting factors are addressed, recovery isn't going to happen.
The only way recovery in going to happen is to raise the river's carrying capacity, and depositing carcasses and limiting harvest isn't going to raise that capacity one bit.


Again Aunty can you produce a scientific stock survey that specifically states that over harvest is a factor for recovery?