Graduate Students

ALEXUS ROBERTS 

Ph.D. Candidate, Graduate Group in Population Biology, University of California, Davis (2017-present)

B.S., Ecology, Evolution, and Environmental Sciences, Purdue University (2017)

Research Interests: I am interested in exploring the evolution of biomechanical processes in fish systems. More specifically, I am interested in using morphological data, ecomorphology, phylogenetics, and comparative methods to understand the diversification and potential constraints placed on functional mechanisms in closely related species. My previous research focused on the role of evolutionary integration in the diversification of the lower jaw adduction system in sculpins and related species. As a member of the Wainwright lab, I hope to expand my skills to understand more about morphological variation and movement across fish lineages.

Recent publications:

Roberts, A.S., Hodge, J.R., Chakrabarty, P., Wainwright, P.C., 2021. Anatomical basis of diverse jaw protrusion directionality in ponyfishes (Family Leiognathidae). Journal of Morphology 282: 427-437. doi: 10.1002/jmor.21314

Roberts, A.S., Farina, S.C., Goforth, R.R., and Gidmark, N.J., 2018. Evolution of skeletal and muscular morphology within the functionally integrated lower jaw adduction system of sculpins and relatives (Cottoidei). Zoology, 129: 59-65.

For more information about Alexus’ research, contact her at asroberts@ucdavis.edu.

 

DARIEN SATTERFIELD

Ph.D. Candidate, Graduate Group in Population Biology, University of California, Davis (2019-present)

M.S., Biology, California State University, Long Beach (2019)
B.S., Biology – Marine option, California State University, Northridge (2015)

Research Interests: I am interested in the relationships among morphological diversity and behavioral ecology in fishes. Specifically, I would like to address the ways in which morphology limits technique in feeding, swimming, and other behaviors. During my undergraduate research I focused primarily on the relationship among size and courtship and feeding behaviors in fish, and my masters thesis addressed local adaptation in behavior as a product of geographic isolation and spatial variation in fishing pressure among populations. I think that now it would be interesting to measure how morphological and behavior correlations may be impacted by selective pressures such as fishing which vary over space.

Recent publications:

Satterfield, D.R., Johnson, D.W. , 2020. Local adaptation of antipredator behaviors in populations of a temperate reef fish. Oecologia 194(4), 571-584. doi: 10.1007/s00442-020-04757-y

Johnson, D.W., Stirling, B.S., Paz, J., and Satterfield, D.R. (2019). Geographic variation in demography of black perch (Embiotoca jacksoni): Effects of density, food availability, predation, and fishing. Journal of Experimental Marine Biology and Ecology. doi: 10.1016/j.jembe.2019.04.008

Satterfield, D.R., and Steele, M.A., 2019. Effects of size and sex on the courting success and foraging behaviour of Embiotoca jacksoniJournal of Fish Biology. doi: 10.1111/jfb.13981

For more information about Darien’s research, visit her website or contact her at darien.glave@gmail.com.

 

NICHOLAS PEOPLES

Ph.D. Student, Graduate Group in Population Biology, University of California, Davis (2021-present)

M.S., Biology (Ecology, Behavior, Evolution), Boston University (2021)

B.S., Environmental Sciences, Duke University (2020)

Research Interests: I am interested in exploring the evolution of jaws and teeth in fishes. More specifically, I am interested in combining ecological, morphometric, and genomic data to explore trophic diversification in adaptive radiations. I have a particular interest in the haplochromine cichlids of Lake Victoria. As a member of the Wainwright lab, I hope to learn more about macroevolutionary patterns and explore new ways to quantify fish tooth traits such as shape.

For more information about Nick’s research, contact him at npeoples@ucdavis.edu.

 

KHALIL RUSSELL

Ph.D. Student, Graduate Group in Population Biology, University of California, Davis (2021-present)

B.S., Biology, College of William & Mary (2021)

Research Interests: I am interested in the relationship between morphology and ecology, the role of phenotypic plasticity in this relationship, and how it relates to outcomes of species introductions. I am particularly fascinated by the remarkable morphological plasticity, history of rapid speciation, and widespread invasive success of the family Cichlidae. My undergraduate work examined morphological differences between native and introduced cichlid populations using geometric morphometric methods. In the future, I would like to explore variation in morphological plasticity among fish families and its potential role in adaptive radiations and in determining invasive success.

For more information about Khalil’s research, visit his LinkedIn or contact him at ktrussell@ucdavis.edu.

 

Postdoctoral Researchers

MICHAEL YUAN

Center for Population Biology Postdoctoral Fellow (2021-present)

Ph.D., University of California, Berkeley (2021)

B.S., Cornell University (2014)

Research Interests: My research is primarily focused on understanding the generation and maintenance of phenotypic diversity through ecological selection. As the phenotype lies at the interface between an organism’s genotype and its environment, I approach the study of phenotypic diversity as inherently integrative, combining genomic, epigenomic, morphological, and ecological techniques. I am currently focused on understanding parallel adaptation in response to xeric-hydric habitat gradients and how differences in habitat modulate niche partitioning in Lesser Antillean anoles.

For more information about Michael’s research, visit his website or contact him at mlhyuan@ucdavis.edu.