Dissertation/Thesis Abstract

Reproductive success of migrant hamadryas baboons in anubis baboon groups
by Hemmalin, Holly A., Ph.D., New York University, 2009, 174; 3342407
Abstract (Summary)

In Ethiopia’s Awash National Park (ANP) there is a well-documented zone of hybridization between anubis and hamadryas baboons. Frequent immigration of hamadryas males into and long-term residence within anubis/anubis-hybrid troops are considered to be among the most important factors for recent structure and maintenance of this hybrid zone (Phillips-Conroy et al. 1992). This study focuses on the genetic contribution of these hamadryas male migrants to maintenance of the ANP hybrid zone.

To determine reproductive success for migrant hamadryas males, I conducted paternity likelihood analyses (Marshall et al. 1998; Kalinowski et al. 2006) of microsatellite allele data obtained from several anubis/anubis-hybrid groups in the Awash that had adult and younger hamadryas males in residence during field seasons between 1983-1998. Only one group in the ANP, group H, has had genetic testing of predictions of mating success based on fieldwork. This study tests Nystrom’s (1992) predictions of mating and reproductive success for hamadryas males and their “one male unit” females in another ANP baboon group, group C. Also, because not all groups’ individuals were trapped and sampled for DNA, I compared frequencies of hamadryas-associated alleles’ (Woolley-Barker 1999) in natal and non-natal individuals of several groups to indirectly determine reproductive success for the migrant hamadryas males. The hypothesis was simply that if hamadryas migrants were reproductively successful, their alleles would be more prevalent among natal versus non-natal group members.

In addition, this study became, in effect, a test of the utility of the likelihood and pairwise methods for determining paternity where maternity is unknown and field observations are limited to non-existent. With recognition of the limitations of the data and the methods of analyses, the goal was to begin to determine future parameters for measuring hamadryas contributions to hybridization in the Awash baboon hybrid zone.

Indexing (document details)
Advisor: Jolly, Clifford J.
Commitee: Bailey, Shara E., DiFiore, Anthony F., Disotell, Todd R., Harrison, Terry, Jolly, Clifford J.
School: New York University
Department: Anthropology
School Location: United States -- New York
Source: DAI-A 70/01, Dissertation Abstracts International
Subjects: Physical anthropology, Organismal biology
Keywords: Anubis baboons, Hamadryas baboons, Hybrid zones, Microsatellites, Reproductive success
Publication Number: 3342407
ISBN: 978-1-109-90266-2
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