I think most of us are aware the damage that Cormorants and Goosanders can do.  We see it for ourselves most days when we are on the river.   Just what that impact is on stocks is difficult to calculate but take a look at the picture below from this months Trout and Salmon magazine to see just how devastating it must be and why it must surely be one of the first priorities that has to be addressed by the powers that be, or anyone with a shotgun!!.