![]() ![]() She is overseeing the creation of a searchable, online database providing access to Goodall's research material.Down syndrome in humans is a chromosome aberration caused by the presence of a third copy of chromosome 21 (HSA21), or trisomy 21 (Down 1866 Jacobs et al. Pusey brought all of Goodall's field notes and photographs from 48 years in Gombe to the University of Minnesota. The Jane Goodall Institute's Center for Primate Studies was established in 1995 at the College of Biological Sciences by Pusey, a former student of Goodall's. "We plan to study more alpha males to determine if grooming is a common strategy that small-bodied males use to placate rivals or cultivate cooperative alliances." "We were aware that Frodo was a bully and a stingy groomer, but we did not know how closely grooming patterns would correlate with body size," Pusey said. Gilby is now a post-doctoral fellow at Harvard, and Murray a post-doctoral fellow at Lincoln Park Zoo. Statistics graduate student Alicia Johnson of the U of M Statistics Clinic guided the statistical analysis. Other collaborators included EEB graduate students Ian Gilby, who guided Foster in the initial outline of the question and in data extraction Carson Murray, who guided data analysis and Emily Wroblewski, who analyzed data on male dominance hierarchies. Pusey is director of the Jane Goodall Institute's Center for Primate Studies at the University of Minnesota and a University McKnight Distinguished Professor in the College of Biological Sciences' department of ecology, evolution and behavior (EEB). "Mark showed extraordinary creativity and tenacity in pulling together this study while still an undergraduate and then seeing it through to publication," said Anne Pusey, who was senior author. Sullivan Fellowship he later spent six months in Tanzania and Gombe and then became an educational assistant at the Lincoln Park Zoo in Chicago. in acting when the research was conducted, was the study's lead author of the study. Mark Foster, who was an undergraduate pursuing a bachelor of arts degree in anthropology and a B.F.A. While it's widely known that grooming plays an important role in chimpanzee social interaction, this study is the first to show that it can be a strategy for achieving dominance. The findings are reported in the February issue of the American Journal of Primatology. (The average male chimp in Gombe weighs about 39 kg (85.8 lbs.). And Freud, who weighed 44.8 kg (98.6 lbs.), used a combination of the two strategies. At the other end of the spectrum, Wilkie, who weighed only 37 kg (81.4 lbs.), obsessively groomed both male and female chimpanzees to maintain his top position. While he allowed other chimpanzees to groom him, he seldom returned the favor. He relied on his size and aggression to rule. Frodo, one of the largest and most aggressive male chimpanzees ever observed at Gombe, weighed 51.2 kg (112.6 lbs.) at his peak. The study focused on three alpha males who reigned between 19. Analysis showed that larger males relied more on physical attacks to dominate while smaller, gentler males groomed other chimpanzees, both male and female, to gain broad support. The finding was gleaned from 10 years of observing dominant male chimpanzees in Gombe National Park, Tanzania, looking at behaviors they used to compete for alpha male status relative to their size. ![]()
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