**If you are here because you caught a tagged fish, go here**
PhD Student, Fisheries, Wildlife and Conservation Biology
2013 – M.S., Wildlife and Fisheries, South Dakota State University
2009 – B.S., Biology, Wisconsin Lutheran College
My primary research interests are focused on addressing aquatic ecological questions that can be applied to fisheries and resource management. I am specifically interested in fish trophic interactions, growth and recruitment, movement patterns, mortality, and their use as biological health indicators. I use multiple approaches in my research, ranging from simulations and hierarchical modeling to hands on field work in the form of telemetry and fish tagging.
My research involves collaboration with state and federal agencies, fellow academic researchers, along with commercial and recreational fisherman. Previous research projects have focused on coral reef monitoring, lake management plans aimed at controlling invasive aquatic plants, and power plant compliance to the EPA’s 316(b) mandate.
For my masters I developed a stream indices of biotic integrity in South Dakota and researched the age structure, growth, and diet of northern pike in prairie streams. My current dissertational research focuses on better understanding the decline of weakfish (Cynoscion regalis) in North Carolina’s coastal waters by estimating fishing mortality through the use of high reward conventional tags and natural mortality through telemetry. Please visit the Weakfish Tagging Study page for additional project information.
Breeggemann, J. J., C. A. Hayer, J. R. Krause, L. D. Schultz, K. N. Bertrand, and B. D. S. Graeb. 2014 Estimating the ages of Black Hills Mountain Suckers: precision, population dynamics, and management implications. Western North American Naturalist 74:299-310.
Krause, J. R. , K. N. Bertrand, A. Kafle, and N. H. Troelstrup, Jr. 2013. A fish index of biotic integrity for South Dakota’s Northern Glaciated Plains Ecoregion. Ecological Indicators 34:313-322.
Kafle, A., N. H. Troelstrup, Jr., Krause, J. R., and K. N. Bertrand. 2013. Assemblage structure of Chironomidae (Diptera: Insecta) from wadeable streams of the Northern Glaciated Plains, South Dakota, USA. Proceedings of the South Dakota Academy of Science 92:31-49.
James, D. A., I. J. Csargo, A. Von Eschen, M. D. Thul, J. M. Baker, C. A. Hayer, J. Howell, Krause, J. R. , A. Letvin, and S. R. Chipps. 2012. A generalized model for estimating the energy density of invertebrates. Freshwater Science 31:69-77.