Abstract # 4526 Poster # 152:

Scheduled for Friday, June 21, 2013 07:00 PM-09:00 PM: Session 21 (SG Foyer ABC) Poster Presentation


A CASE OF HYBRIDIZATION IN GUENONS AT NYUNGWE FOREST NATIONAL PARK, RWANDA: CERCOPITHECUS ASCANIUS SCHMIDTI X C. POGONIAS DENTI

K. M. Detwiler1, J. Gray2 and B. A. Kaplin3
1Florida Atlantic University, Department of Anthropology, Boca Raton, FL 33431, USA, 2Miami Dade College, 3Department of Environmental Studies, Antioch University New England
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Guenons offer a unique opportunity to study primate hybridization because of their ability to hybridize in nature. African rainforests often contain 3-5 ecologically distinct guenon species, and it is common for these species to form polyspecific associations. Hybridization is rare between sympatric species, and is thought to occur when individuals are faced with low availability of conspecific mates. In March 2004, we discovered an adult female hybrid Cercopithecus ascanius schmidti x C. pogonias denti living with a group of colobus monkeys (Colobus angolensis) in a forest fragment 1.4 km from the main forest of Nyungwe National Park, Rwanda. We identified the hybrid as an F1 because of her intermediate phenotype, and returned in August 2005 to collect noninvasive fecal samples to confirm her hybrid status. We used X-chromosomal DNA (human Xq13.3 homolog) to test for biparental ancestry. Sequence data showed 17 polymorphic sites, of which 13 sites were already known from guenon phylogenic studies to differ between the parental species. The variable sites indicate that the hybrid had one X-DNA lineage from C. ascanius and the other from C. pogonias, supporting her F1 status. This is the first study to use noninvasive genetic techniques in wild guenons to confirm hybrid identity. Identification of hybrid monkeys is important, as it helps us understand frequency of hybridization in the wild, and the context in which it occurs.