James D. M. TolliverDoctoral Student
My main study system for these evolutionary studies is the ruff (Philomachus pugnax). This species represents a unique system for examining persistence of genetically distinct morphs. Both male and female ruffs fall into one of three distinct morphs called Independents, Satellites, and Faeders. Satellites and Faeders arose as the result of a chromosomal inversion. Remarkably, although recent findings suggest that this inversion represents a genetic handicap, the three morphs exist across ruff populations at relatively stable frequencies. Molecular dating indicates that they have been present in the ruff species for hundreds of thousands of years. Independents are the most frequent type in males and females whereas Faeders are very rare with less 1% of adults belonging to this morph. My central PhD project will examine the frequencies of the different morphs in the wild at different life stages with two sex demographic modeling. These population-matrix models are intended to provide parameter estimates that may elucidate how all three morphs persist within ruff populations.
- Presently: PhD student (Behavioural Genetics and Evolutionary Ecology), Max Planck Institute for Ornithology and the University of Konstanz, Germany. Thesis topic: Ruff Persistence: The evolutionary and behavioral maintenance of intraspecific diversity
- 2017: M.S. (Wildlife Ecology): Texas State University, USA. Title of thesis: Eastern black rail (Laterallus jamaicensis jamaicensis) occupancy and abundance along the Texas coast with implications for survey protocols.
- 2013: B.S.F. (Forest
Wildlife Management): Stephen F. Austin State University, USA