Andrea Schreier

image of Andrea Schreier

Adj Asst Professor


Animal Science

Offices and Labs

2235 Meyer Hall, Davis, CA 95616
+1 530 752 0664


2012 PhD Ecology University of California Davis
2006 MS Wildlife Genetics Purdue University
2003 BS Biology, Chemistry Minor Hillsdale College

Research Interests

Genetic tools to improve management/conservation of fish and wildlife species

My group uses genetic and genomic tools to answer questions that directly influence the management and conservation of North American fish and wildlife species.  We are particularly interested in the conservation of native California fishes such as delta smelt, sturgeon, and salmonids although we also study invertebrates, amphibians, and mammals. Much of this research is conducted collaboratively with state, tribal, or federal agency biologists, providing students with opportunities to work directly with conservation practitioners.

Improving conservation and commercial aquaculture to protect wild populations

Aquaculture is a tool that can be used to sustain endangered fish populations directly through release of captive reared fish into the wild (conservation aquaculture) or indirectly by providing an alternative source of fish protein to meet human demand (commercial aquaculture). My group applies genetics/genomics to improve the management of captive fish populations for conservation and commercial aquaculture.  We conduct ongoing genetic monitoring of captive breeding programs for delta smelt and white sturgeon. We also are studying the costs and benefits of spontaneous autopolyploidy to the white sturgeon commercial aquaculture industry.

Autopolyploidy in Acipenseriform fishes

Acipenseriform fishes (sturgeon and paddlefishes) are ancient polyploids that can spontaneously triploidize in aquaculture.  Spontaneous autopolyploid white sturgeon are fertile and produce viable offspring when crossed with normal conspecifics.  We know that the additional genome copy is due to retention of the second polar body in the maternal parent but its not clear what is causing some females to produce large numbers of triploid offspring in captivity while spontaneous autopolyploidy in the wild is rare. We are conducting experiments to determine what factors are responsible for high rates of second polar body retention as well as evaluating how genome duplication affects sexual development of spontaneous autopolyploids and their offspring. We are also interested in using families containing even ratios of normal and spontaneous autopolyploid offspring to determine how an incipient polyploidization event affects genome structure and function.


Robert L. Kendall Award (Best paper in Transactions of the American Fisheries Society in 2013)


American Fisheries Society
North American Sturgeon and Paddlefish Society (Executive Board member)
World Sturgeon Conservation Society

CBS Grad Group Affiliations

Integrated Genetics and Genomics

Specialties / Focus

Integrated Genetics and Genomics
  • Population and Quantitative Genetics
  • Ecological and Wildlife Genetics

Teaching Interests

I am interested in teaching courses related to molecular ecology and evolution. While teaching is not my primary focus as adjunct faculty, I plan to offer seminar courses of interest to IGG students.


ECL 200A I teach the population genetics and microevolution module of the Ecology Graduate Group core course (Winter)
ECL 290 Writing Science for Ecologists (Fall)

Personal Interests

In my spare time, I enjoying reading, hiking, travelling internationally, photographing wildlife, and raising food sustainably. My husband and I live on a small hobby farm where we grow fruits and vegetables as well as raise chickens.


1/10/2015 8:21:46 AM
  • Schreier, A., S. Stephenson, P. Rust, S. Young. 2015.  The case of the endangered Kootenai River white sturgeon (Acipenser transmontanus) highlights the importance of post-release genetic monitoring in captive and supportive breeding programs. Biological Conservation 192:74-81.

  • Gille, D. A., T. R. Famula, B. P. May, and A. D. Schreier.  2015.  Evidence for a maternal origin of spontaneous autopolyploidy in cultured white sturgeon (Acipenser transmontanus).  Aquaculture 435:467-474.

    Schreier, A. D., B. May, and D. A. Gille. 2013. Incidence of spontaneous autopolyploidy in cultured populations of white sturgeon, Acipenser transmontanus. Aquaculture 416-417:141-145.

    Drauch Schreier, A., B. Mahardja, and B. May. 2013. Variable patterns of population structure revealed across the range of the ancient octoploid white sturgeon, Acipenser transmontanus. Transactions of the American Fisheries Society 142(5):1273-1286.

    Nelson, T. C., P. Doukakis, S. T. Lindley, A. Drauch Schreier, J. E. Hightower, L. R. Hildebrand, R. E. Whitlock, and M. A. H. Webb. 2013. Modern technologies for an ancient fish: tools to inform management of migratory sturgeon stocks. PLoS ONE 8(8):e71552.

    Drauch Schreier, A., B. Mahardja, and B. May. 2012. Hierarchical patterns of population structure in the endangered Fraser River white sturgeon, Acipenser transmontanus, and implications for conservation. Canadian Journal of Fisheries and Aquatic Sciences 69:1968-1980.

    Drauch Schreier, A., J. Rodzen, S. Ireland, and B. May. 2011. Genetic techniques inform conservation aquaculture of the endangered Kootenai River white sturgeon, Acipenser transmontanus. Endangered Species Research 16:65-75.

    Drauch Schreier, A., D. A. Gille, B. Mahardja, and B. May. 2011. Neutral markers confirm the octoploid origin and reveal spontaneous polyploidy in white sturgeon, Acipenser transmontanus. Journal of Applied Ichthyology 27(Suppl 2): 24-33.

    Anders, P., A. Drauch Schreier, J. Rodzen, M. Powell, and S. Narum. 2011. A review of genetic evaluation tools for conservation and management of sturgeons: Roles, benefits, and limitations. Journal of Applied Ichthyology 27(Suppl 2): 3-11.

    Drauch, A. M., B. E. Fisher, E. K. Latch, J. A. Fike, and O. E. Rhodes, Jr. 2008. Evaluation of a remnant lake sturgeon population’s utility as a source for reintroductions in the Ohio River system. Conservation Genetics 9:1195-1209.

    Börk, K. B., A. M. Drauch, J. A. Israel, J. K. Pedroia, J. Rodzen, and B. P. May. 2008. Development of new microsatellite DNA primers for green and white sturgeon. Conservation Genetics 9:973-979.

    Fike, J. A., A. M. Drauch, J. C. Beasley, G. Dharmarajan, and O. E. Rhodes, Jr. 2007. Development of fourteen multiplexed microsatellite loci for raccoons (Procyon lotor). Molecular Ecology Notes 7: 525-527.

    Drauch, A. M. and O. E. Rhodes, Jr. 2007. Genetic evaluation of the lake sturgeon reintroduction program in the Mississippi and Missouri Rivers. North American Journal of Fisheries Management 27(2): 434-442.