wing of Drosophila santomea
1) Comparative quantitative genetics across Drosophila
This research will be one of the main foci of my postdoctoral research with Tony Frankino. We will be trying to isolate the QTLs responsible for interespecific wing shape variation. Comparisons will utilize three well studied Drosophila species pairs. This will also allow us to look for shared patterns of molecular and morphological evolution.2) Post-orbital color pattern variation and the evolution of a radiation of turtles (Grapteyms)
For my dissertation research, I examined the role of post-orbital color patterns in selection, speciation,and mate choice in the map turtle genus. I utilized a variety of techniques including phylogenetic and population genetic analyses, morphometrics, mate choice experiments, and multivariate heritability. While there are interesting patterns of morphological variation, post-orbital coloration does not appear to be a driving force in speciation or mate selection. I'm currently preparing several manuscripts for publication.
Graptemys geographica (Common map turtle females)
Trachemys scripta (red-eared slider turtle)
3) Plastron shape in slider turtles Trachemys scripta
With my collaborators, I examined plastron shape for 162 clutches of slider turtles and assesed differences in shape between populations, nests, and individuals. I calculated heritability and examined the direction of shape of shape. Subsequent research has examined the effects of body size and plastron shape during overland migration and in swimming performance. Future work in this system will examine the heritability of righting time. PDF1 PDF24) Cranial morphology in Plethodon salamanders.
With Dean Adams, I examining the effect of interspecific interactions between Plethodon cinereus and Plethodon shenandoah on salamander head morphology. We looked at populations on 3 mountains in the Applachains and compared populations across elevations. This work is in press. Additional research examined how cranial morphology of Plethodon cinereus differed between upland and lowland habitats. Additionally, the research examined the relationship of habitat and prey types and found a correlation between changes in head morphology and changes in diet.
Plethodon cinereus (red-backed salamander)
Ambystoma maculatum (spotted salamander)