Mesoscale variation in fish populations in two small Appalachian streams (fish population data).

We examined the reach-scale distributions of three fish species to determine which biotic and abiotic factors are influential in the fishes distributions.1.Within each of the 150m stream section, we used three-pass electroshocking to derive estimates of mean ( + SD) abundance for C. bairdi , R. cataractae, and O. mykiss. We placed block nets at the beginning and end of each reach to prevent emigration of the fish to adjacent reaches