Abstract of Smith, G.R., and T.N. Todd. 1984. Evolution of species flocks of fishes in north temperate lakes., p. 45-68 in A. Echelle and I. Kornfield (eds.), Evolution of Fish Species Flocks. Univ. Maine Orono Press, Orono, 257 pp.

Seven species of Great Lakes ciscoes, 25 species of Baikal sculpins, 3 species of Bear Lake whitefish, and numerous coregonine pairs in glaciated regions show intralacustrine differentiation by segregation of spawning populations to different spawning times and places. The driving force was probably competitive selection of modal populations centered on zooplankton peaks in time and space.