Adjunct Associate Professor
S.O. Conte Anadromous Fish Research Center

Primary interests

Dr. Letcher’s area of research is population ecology. Particular interests include: the evolutionary ecology of stream salmonids, integrated modeling of population dynamics, development of models for forecasting effects on environmental change on population persistence, decision science applications, data visualization, and application of model results to management problems.

See for more details

Current Projects

  • Development of web applications to aid natural resource management []
  • Data visualization of data from tagging studies []
  • Development of integrated modeling across data types
  • Integration of survey data with capture-recapture models to characterize population trends across space
  • Estimates of lifetime fitness for stream-dwelling trout.
  • Development of PIT tag technologies.

Selected Recent Publications

Refereed :

Letcher, B.H., Hocking, D.J., O’Neil, K., Whiteley, A.R., Nislow, K.H., O’Donnell, M. 2016. A hierarchical model of daily stream temperature using air-water temperature synchronization, autocorrelation, and time lags. PeerJ

Kanno, Y, KC Pregler, NP Hitt, BH Letcher, DJ Hocking, and JEB Wofford, 2016. Seasonal temperature and precipitation regulate brook trout young-of-the-year abundance and population dynamics, Freshw. Biol., 61: 88-99.

Bassar, R., Letcher, B.H., Nislow, K.H., and Whiteley, A.R., 2016, Seasonal change in climate outpaces compensatory density-dependence in eastern brook trout, Global Change Biology, 22:577-593.

Kovach, RP, CC Muhlfeld, RAl-Chokhachy, JB Dunham, BH. Letcher, JL Kershner, 2015. How does climatic variation influence trout over time?  A global synthesis and new pathway forward, Reviews in Fish and Fisheries, DOI: 10.1007/s11160-015-9414-x

Kanno,Y., Letcher, B.H., Hitt, N., Boughton, D., Wofford, J., and Zipkin, E., 2015. Seasonal weather patterns drive population vital rates and persistence in a stream fish. Global change biology, 21:1856-1870.

Letcher, B.H., Schueller, P., Bassar, R., Nislow, K.H., Coombs, J.A., Sakrejda, K, Morrissey, M., Sigourney, S., Whiteley, A.R., O’Donnell, M. , Dubreuil, T., 2014. Robust estimates of environmental effects on population vital rates: an integrated capture-recapture model of seasonal brook trout growth, survival and movement in a stream network, Journal of Animal Ecology. DOI: 10.1111/1365-2656.12308

Zipkin,E., J. Thorson, K. See, H. Lynch, E. Grant, Y. Kanno, R. Chandler, B.H. Letcher, and J. Royle. 2014. Modeling structured population dynamics using data from unmarked individuals. Ecology, 95:22-29 doi:10.1890/13-1131.1

Kanno, Y, B. H. Letcher, J Coombs, and K.H. Nislow, 2014.  Linking fish movement and reproductive history to assess habitat connectivity in a heterogeneous stream network, Freshw. Biol. 59(1): 142-154 doi:10.1111/fwb.12254

Steinschneider S., Polebitski A, Brown C, Letcher BH. 2012. Towards a statistical framework to quantify the uncertainties of hydrologic response under climate change, Water Resources Journal, 48, W11525, 10.1029/2011WR011318

Sigourney, D. B., Munch, S. B., & Letcher, B. H., 2012. Combining a Bayesian nonparametric method with a hierarchical framework to estimate individual and temporal variation in growth. Ecol. Model., 247, 125–134.

Letcher, B.H., K.H. Nislow, J.A. Coombs, M. J. O’Donnell, T. D. Dubreuil. 2007. Population response to habitat fragmentation in a stream-dwelling brook trout population. PLoS ONE 2(11): e1139. doi:10.1371/journal.pone.0001139.