How would you use it? Rivers and streams are pretty different in Texas than up north. Looking at that "drift net," if I were to use it I think I would drop it over the edge of the boat, wait a few minutes, and then rapidly pull it back up.
Well, you have to be able to see the fish in order to use it. You throw it into the water, wait until the fish hover over it (a white net is best for this), and jerk it back in. This is for fishing from land/bridge. For boat use, you tow it through a school of fish. Shad will often churn the surface of the water, so you can target them. Blindly trolling with the net would not be productive, I would think.
I dunno about Texas fishes - a whole different set of rules may apply.