Spawning habitat, behavior, and morphology as isolating mechanisms of the golden redhorse, Moxostoma erythrurum, and the black redhorse, M. duquesnei, two syntopic fishes

Golden redhorse, Moxostoma erythrurum, and black redhorse, M. duquesnei, were observed spawning during the springs of 1984 through 1987 in Stony Creek, Illinois, at water temperatures ranging from 15–21°C. Both species spawned simultaneously within the same stream reach in 1987. Male golden redhorse aggressively defended territories on shoals and were… CONTINUE READING