Bret's photo I am a faculty member in the School of Renewable Natural Resources at Louisiana State University. My work is focused on wildlife population ecology where my interests primarily lie in population dynamics and harvest management, focused on sampling design and parameter estimation of mammal and bird populations,capture-mark-recapture modeling, spatial modeling, and associated statistical and computational ecology questions.

Contact information

School of Renewable Natural Resources          		Off Phone: Deprecated...(I have one, I don't check it, email is best)
Renewable Natural Resources Building RM: 341		Cell Phone:  Not a chance...email is best
Louisiana State University                      	e-mail: paste("bret", "lsu.edu", sep="@")
Baton Rouge, LA 70803		                    	www:    rnr.lsu.edu/bret and Twitter: @DrShortSpur

Current Research Program

Here is a (much abbreviated) list of the ongoing work I am currently doing. Of course these larger headings overlay a variety of individual studies that fall within each category.

Current Teaching

  • RNR 4011: Wildlife Management Techniques (Fall 16)
  • RNR 7013: Wildlife Population Dynamics (Fall 16) [Class Link]

    R Packages, Course Notes, and Code Snippets

    In an effort to ensure my analyses are reproducible for other scientists if needed, here are some R packages/code/data for some recent projects (older stuff is coming out more slowly).

  • Texas Chapter TWS R Workshop (Austin 2014) R Notes ([Notes]), set up information ([RSetup]), R code ([Code]) and package files ([Packages])
  • ByrneDBBMM: (ByrneDBBMM). R package supporting Byrne et al. (2014) that wraps up the raw data and dynamic Brownian bridge movement model code for fine scale temporal modeling of habitat selection by several species.
  • Advanced MARK Workshop (Fort Collins 2013) RMark Notes ([Notes]) and R code ([Code]) and Presentation ([Presentation])
  • Txmrds: (Txmrds). R package supporting Collier et al. (2013) that wraps up the raw data and mrds modeling code for Golden-cheeked warblers and Black-capped vireo's on the live fire region of Fort Hood Military Installation, Texas. Will be incorporated into R package mrds .
  • foRthood: (foRthood). R package supporting Farrell et al. (2013) that wraps up the raw data and occupancy modeling code for Golden-cheeked warblers and Black-capped vireo's RSF creation on the live fire region of Fort Hood Military Installation, Texas.
  • moveud: (moveud_1.0.5). R package that creates time-step specific polygons shapefiles from a dynamic Brownian Bridge movement model (R package move) and for a brownian.bridge model (R package BBMM) for export to GIS (if you choose) for further analysis. Draft Vignette (vignette)
  • biRdkern: (biRdkern). R package supporting development of simple kernel densities from repeated locations from avian territory mapping (see ?bird for more info)
  • bfdeeR: (bfdeeR). R package supporting Collier et al. (2013) that wraps up data for a Huggins double-observer closed capture model evaluating whether we should continue to use spotlights to survey white-tailed deer. Code/raw data is also included in RMark examples.
  • bRwwdo: (bRwwdo). R package supporting Collier et al. (2012) that wraps up the raw data and a multi-strata, mark-recapture, band recovery analysis for white-winged doves here in Texas.
  • rRwwdo: (rRwwdo). R package supporting Collier et al. (2013) that wraps up the raw data and a JS-POPAN capture-recapture analysis for white-winged doves banded in Alice, Texas during 2009 and 2010. Code/raw data is also included in RMark examples.
  • I contributed (a bit) to a R package for point-based mark-recapture distance sampling ([.pdf]). The R package (mrpt) is currently being integrated into Jeff Laake's mrds (mark-recapture distance sampling) R package which is a part of Distance (Distance Web Page).
  • Code for a semiparametric occupancy model allowing for spatially explicit estimates of occupancy I did for Golden-cheeked warblers in Texas (WinBugsCode) & ([.pdf]).
  • Building Confidence Intervals for a GLM (Logistic Regression) in R (Example)
  • R for Ecologists which is a short course I put together introducing wildlife ecology grad students to R: ([Notes])

    Obligatory professional stuff

  • Publications: (Publications)