Christine M. Drea
Earl D. McLean Professor
I have two broad research interests, sexual differentiation and social behavior, both focused on hyenas and primates. I am particularly interested in unusual species in which the females display a suite of masculinized characteristics, including male- like or exaggerated external genitalia and social dominance. The study of naturally occurring hormones in such unique mammals can reveal general processes of hormonal activity, expressed in genital morphology, reproductive development, and social behavior. Taking a combined laboratory and field approach allows me to relate captive data to various facets of the animals' natural habitat, thereby enhancing the ecological validity of assay procedures and enriching interpretation in an evolutionary framework. The goal of comparative studies of hyenas and lemurs is to help elucidate the mechanisms of mammalian sexual differentiation.
My research program in social behavior focuses on social learning and group cohesion. Using naturalistic tasks that I present to captive animals in socially relevant contexts, I can investigate how social interaction modulates behavior, problem- solving, and cognitive performance. By studying and comparing models of carnivore and primate foraging, I can better understand how group-living animals modify their actions to meet environmental demands. A primary interest is determining whether similar factors, related to having a complex social organization, influence learning and performance across taxonomic groups. I am also interested in how animals learn rules of social conduct and maintain social cohesion, as evidenced by their patterns of behavioral developmental, the intricate balance between aggression and play, the expression of scent marking, and the social facilitation or inhibition of behavior.
Drea, CM. "D'scent of man: a comparative survey of primate chemosignaling in relation to sex." Hormones and behavior 68 (February 2015): 117-133. (Review) Full Text
Crawford, JC, and Drea, CM. "Baby on board: olfactory cues indicate pregnancy and fetal sex in a non-human primate." Biology letters 11.2 (February 2015): 20140831-. Full Text Open Access Copy
Petty, JMA, and Drea, CM. "Female rule in lemurs is ancestral and hormonally mediated." Scientific reports 5 (January 2015): 9631-. Full Text
delBarco-Trillo, J, and Drea, CM. "Socioecological and phylogenetic patterns in the chemical signals of strepsirrhine primates." Animal Behaviour 97 (November 1, 2014): 249-253. Full Text
delBarco-Trillo, J, and Drea, CM. "Socioecological and phylogenetic patterns in the chemical signals of strepsirrhine primates." Animal Behaviour 97 (November 2014): 249-253. Full Text
Leclaire, S, Nielsen, JF, and Drea, CM. "Bacterial communities in meerkat anal scent secretions vary with host sex, age, and group membership." Behavioral Ecology 25.4 (July 1, 2014): 996-1004. Full Text
Kulahci, IG, Drea, CM, Rubenstein, DI, and Ghazanfar, AA. "Individual recognition through olfactory-auditory matching in lemurs." Proceedings. Biological sciences / The Royal Society 281.1784 (June 7, 2014): 20140071-. Full Text
Kulahci, IG, Drea, CM, Rubenstein, DI, and Ghazanfar, AA. "Individual recognition through olfactory-auditory matching in lemurs." Proceedings of the Royal Society B: Biological Sciences 281.1784 (June 2014): 20140071-. Full Text
Greene, LK, and Drea, CM. "Love is in the air: sociality and pair bondedness influence sifaka reproductive signalling." Animal Behaviour 88 (February 2014): 147-156. Full Text Open Access Copy
Cunha, GR, Risbridger, G, Wang, H, Place, NJ, Grumbach, M, Cunha, TJ, Weldele, M, Conley, AJ, Barcellos, D, Agarwal, S, Bhargava, A, Drea, C, Hammond, GL, Siiteri, P, Coscia, EM, McPhaul, MJ, Baskin, LS, and Glickman, SE. "Development of the external genitalia: Perspectives from the spotted hyena (Crocuta crocuta)." Differentiation 87.1-2 (January 2014): 4-22. Full Text