Dave thanks. I have quickly read but not studied the paper yet. I missed the part about the hypothetical lengths and only saw the actual samples from Barnett. I also did not catch the differences from one set of charts to the other. I guess I almost backed into the answer to my question.

I was looking for broad based PSD , year class and growth info for management purposes. Those were in the first set of charts as I thought but for the wrong reason. Even a blind hog can sometimes find an acorn.

My question is far more basic than that. What type , if any , of conclusions/info can we draw from the first set of charts using average mort rates wrt age , length and year class size of populations.