Theory and applications of population biology; behavior of population models, as revealed by analytical methods and computer simulation; application to population problems such as endangered species; discussion of classical and current literature in population biology. Pre: one of 453, 454, 456, NREM 680, PEPS 671, ZOOL 439, ZOOL 467, ZOOL 620, or ZOOL 623; or consent. (Cross-listed as ZOOL 652)