I find it curious that the PFBC has not released its findings for the lower Susquehanna River on YOY fish survival in 2006. I believe, as others have posted above, that past surveys have confirmed that there has been a poor crop of YOY fish for the last 6 years because of high water during / after spawning time, and the mysterious fish kill last year. One can only guess that the trend continued in 2006, since the recent survey is not published.
My opinion, based only on my and other peoples fishing experience this year, is that the smallmouth population has fared better on the north branch. There seems to have been more fish caught, and more year classes represented in the catch. The fishing hasn’t been great, but it appears better than the main branch north of Harrisburg down to Maryland.
Let’s hope that Mother Nature cooperates in coming years, and this proves to be just the low point of a natural cycle, and the population rebuilds itself. At least to my knowledge, no other factor for the population downturn has been identified; all we have left is hope.