Peter T. Ellison, chair of anthropology at Harvard University, will be giving two public lectures on the University of California, Davis, campus. Entitled "Ecology and Human Fecundity" and "Ecology and the Human Ovary," the talks will address a relatively new field in human biology called "reproductive ecology." The first will be on Monday, Oct. 16, and the second on Wednesday, Oct. 18. Both will begin at 4:10 p.m. and will be in 180 Med Sci Bldg. C. Chair of the Department of Anthropology at Harvard, Ellison is curator of human biology at the Peabody Museum of Archaeology and Ethnology and is director of the Reproductive Ecology Laboratory. Recently his research has focused on the effects of age, energetics and disease on the human reproductive system. He has done field research in Zaire, Poland, Bolivia and Nepal. Ellison studies variations in female reproductive cycles among healthy individuals and populations. In his first lecture, he will review different historical perspectives on human fertility. His second talk will focus on some of his recent research, which investigates how ecological factors -- such as nutrition, exercise and age -- affect ovarian physiology. The lectures are hosted by the Institute of Toxicology and Environmental Health and the Division of Biological Sciences at UC Davis. Financial support comes from the Storer Lectureship, established in 1960 to bring eminent life scientists from other institutions to the UC Davis campus. It is supported through funds donated by the late Tracy I. Storer, founding chair of the campus zoology department, and the late Dr. Ruth Risdon Storer, his wife and the first woman pediatrician in Yolo County.