Comparing depth in a lake and depth in a river is apples to oranges.
Pike habitat in the Tri-Cities?
Like where the largest tributary of the Columbia River dumps in?
Like where giant caspian tern and cormorant colonies are for good reason?
Like where the water temp gets optimal for warm water spp right when subyearlings are migrating?
Like the time of year the highest levels of predation occur?
Like any of that stuff?
Wait you're right I'm sure pike will be kegged up and hugging the bottom in 50' of water in mid-August. Sorry I don't know what I was thinking...
They're going to occupy the same depths, river or lake. Look at the Pend Orielle, they are caught in the shallow water areas just like lakes.
I guess you didnt get my point or I dont get yours? Yes the Tri-Cities are of the Columbia and down river from there has suitable shallow warmer habitat for Pike, hence why I said Tri-Cities. If it holds Largemouth Bass, it will hold Pike. Yes they will eat some young of the year Salmonids running through the area. I doubt they will impact it anymore than the Smallmouth have, if even that much. Pike grow large and wont be chasing fry very long. They can consume fish 1/3 their size and will do so over smaller offerings. It's expenditure of energy vs energy consumption. I see a lot of Carp, Tench, Squaws, Chubs, Suckers, and Daces in their diet along with Bass, Walleye, and Salmonids. The young pike will be the worst on the Salmonids.
Not sure how you got that out of what I said, last I checked mid August is not winter
