Len Thomas Publications
Submitted
- Mateos, M., G.M. Arroyo and L. Thomas. The development and use of a method to fill time gaps in migration counts: seabird conservation applications.
In press
- Buckland, S.T., A.J. Plumptre, L. Thomas and E.A. Rexstad. Line transect sampling of primates: Can animal-to-observer distance methods work? International Journal of Primatology.
- Buckland, S.T., A.J. Plumptre, L. Thomas and E.A. Rexstad. Design and analysis of line transect surveys for primates. International Journal of Primatology.
- Marques, T.A., S.T. Buckland, D.L. Borchers, E. Rexstad and L. Thomas. Distance sampling. Springer's International Lexicon of Statistical Sciences.
- Thomas, L., S.T. Buckland, E.A. Rexstad, J.L. Laake, S. Strindberg, S.L. Hedley, J.R.B. Bishop, T.A. Marques and K.P. Burnham. Distance software: design and analysis of distance sampling surveys for estimating population size. Journal of Applied Ecology.
Published in peer-reviewed journals
- Fewster, R.M., S.T. Buckland, K.P. Burnham, D.L. Borchers, P.E. Jupp, J.L. Laake and L. Thomas. 2009. Estimating the encounter rate variance in distance sampling. Biometrics 65: 225-236.
- Marques, T.A., L. Thomas, J. Ward, N. DiMarzio, P. L. Tyack. 2009. Estimating cetacean population density using fixed passive acoustic sensors: an example with beaked whales. Journal of the Acoustical Society of America 125: 1982-1994.
- Newman, K.B., C. Fernández, S.T. Buckland and L. Thomas. 2009. Monte Carlo inference for state-space models of wild animal populations. Biometrics 65: 572-583.
- Williams, R. and L. Thomas. 2009. Cost-effective abundance estimation of rare marine animals: small-boat surveys for killer whales in British Columbia, Canada. Biological Conservation 142: 1542-1547.
- Patterson, T.A., L. Thomas, C. Wilcox, O. Ovaskainen and J. Matthiopoulos. 2008. State-space models of individual animal movement. Trends in Ecology and Evolution 23: 87-94.
- Buckland, S.T., K.B. Newman, C. Fernández, L. Thomas and J. Harwood. 2007. Embedding population dynamics models in inference. Statistical Science 22: 44-58.
Marques, T.A., L. Thomas, S.G. Fancy and S.T. Buckland. 2007. Improving estimates of bird density using multiple covariate distance sampling. The Auk 127: 1229-1243.
Thomas, L., R. Williams and D. Sandilands. 2007. Designing line transect surveys for complex survey regions. Journal of Cetacean Research and Management 9: 1-13.
Williams, R. and L. Thomas. 2007. Distribution and abundance of marine mammals in the coastal waters of British Columbia, Canada. Journal of Cetacean Research and Management 9: 15-28.
[full text (pdf)]
Harrison, P.J., S.T. Buckland, L. Thomas, R. Harris, P. Pomeroy and J. Harwood. 2006. Incorporating movement into models of grey seal population dynamics. Journal of Animal Ecology 75: 634-645.
[doi:10.1111/j.1365-2656.2006.01084.x article at publishers web site (pdf and html)]
Buckland, S.T., R.W. Summers, D.L. Borchers and L. Thomas. 2006. Point transect sampling with traps or lures. Journal of Applied Ecology 43: 377-384.
Newman, K.B., S.T. Buckland, S.T. Lindley, L. Thomas & C Fernández. 2006. Hidden process models for animal population dynamics. Ecological Applications 16: 74-86.
Matthiopoulos, J., J. Harwood & L. Thomas. 2005. Metapopulation consequences of site fidelity for colonially breeding mammals and birds. Journal of Animal Ecology 74: 716-727.
Thomas, L., S.T. Buckland, K.B. Newman & J. Harwood. 2005. A unified framework for modelling wildlife population dynamics. Australian and New Zealand Journal of Statistics 47: 19-34.
Buckland, S.T., K.B. Newman, L. Thomas & N.B. Koesters. 2004. State-space models for the dynamics of wild animal populations. Ecological modelling 171: 157-175.
Anderson, D.R., K.P. Burnham, B.C. Lubow, L. Thomas, P.S. Corn, P.A. Medica, & R.W. Marlow. 2001. Field testing line transect estimation of desert tortoise abundance. Journal of Wildlife Management 65: 583-597.
Thomas, L. 1997. Retrospective power analysis. Conservation Biology 11: 276-280.
Thomas, L. & J. Proctor. 1997. Invertebrates in the litter and soil on the ultramafic Mount Giting-Giting, Republic of the Philippines. Journal of Tropical Ecology 13: 125-131.
Thomas, L. 1996. Monitoring long-term population change: why are there so many analysis methods? Ecology 77: 49-58.
Thomas, L. & F. Juanes. 1996. The importance of statistical power analysis: an example from Animal Behaviour. Animal Behaviour 52: 856-859.
Thomas, L. & K. Martin. 1996. The importance of analysis method for Breeding Bird Survey population trend estimates. Conservation Biology 10: 479-490.
Hannon, S., K. Martin, L. Thomas & J. Scheik. 1993. Investigator disturbance and clutch predation in Willow Ptarmigan: methods for evaluating impact. Journal of Field Ornithology 64: 575-586.
Other publications
- Thomas, L. 2009. Grey seals red in tooth and claw: how Darwin helps model their population. Significance 6(3):108-112
- Baillie, S.R., S.P. Brooks, R. King and L. Thomas. 2008. Using a state-space model of the UK Song Thrush Turdus philomelos population to diagnose the causes of a population decline. Pp 543-564 in Thomson, D.L., E.G. Cooch and M.J. Conroy (Eds.) Modeling Demographic Processes in Marked Populations. Environmental and Ecological Statistics Vol 3. Springer. ISBN: 978-0-387-78150-1.
- Giminez, O., S. Bonner, R. King, R.A. Parker, S. Brooks, L.E. Jamieson, V. Grosbois, B.J.T. Morgan and L. Thomas. 2008. WinBUGS for population ecologists: Bayesian modeling using Markov Chain Monte Carlo methods. Pp 885-918 in Thomson, D.L., E.G. Cooch and M.J. Conroy (Eds.) Modeling Demographic Processes in Marked Populations. Environmental and Ecological Statistics Vol 3. Springer. ISBN: 978-0-387-78150-1.
- Nichols, J.D., L. Thomas and P.B. Conn. 2008. Inferences about landbird abundance from count data: recent advances and future directions. Pp 203-238 in Thomson, D.L., E.G. Cooch and M.J. Conroy (Eds.) Modeling Demographic Processes in Marked Populations. Environmental and Ecological Statistics Vol 3. Springer. ISBN: 978-0-387-78150-1.
- Buckland, S.T., K.B. Newman, C. Fernández, L. Thomas and J. Harwood. 2006. Defining matrix population models and fitting them to data. Actos do XIII Congresso Annual da SPE, pp.15-27.
- Buckland, S.T., D.R. Anderson, K.P. Burnham, J.L. Laake, D.L. Borchers & L. Thomas (editors). 2004. Advanced Distance Sampling. Oxford University Press.
- Thomas, L., K.P. Burnham & S.T Buckland. 2004. Temporal inferences from distance sampling surveys. Chapter 5 in Buckland, S.T., D.R. Anderson, K.P. Burnham, J.L. Laake, D.L. Borchers & L. Thomas (Eds.), Advanced Distance Sampling. Oxford University Press.
- Strindberg, S., S.T Buckland & L. Thomas. 2004. Design of distance sampling surveys and Geographic Information Systems. Chapter 7 in Buckland, S.T., D.R. Anderson, K.P. Burnham, J.L. Laake, D.L. Borchers & L. Thomas (Eds.), Advanced Distance Sampling. Oxford University Press.
- See above for book links.
- Thomas, L., G. Geupel, N. Nur & G. Ballard. 2004. Optimizing the allocation of count days in a migration monitoring program. Pp. 97-111 in Ralph, C.J. & E.H. Dunn (Eds.), Monitoring Bird Populations Using Mist Nets, Studies in Avian Biology 29, Cooper Ornithological Society.
- Thomas, L., S.T. Buckland, K.P. Burnham, D.R. Anderson, J.L. Laake, D.L. Borchers & S. Strindberg. 2002. Distance sampling. Pp 544-552 in Encyclopedia of Environmetrics. A.H. El-Shaarawi & W. W. Piegorsch. John Wiley & Sons, Chichester.
- Thomas, L. and K.U. Karanth. 2002. Statistical concepts: Estimating absolute densities of prey species using line transect sampling. Pp 87-110 in Monitoring Tigers and Their Prey. K.U. Karanth & J.D. Nichols, editors. Centre for Wildlife Studies, India.
- Karanth, K.U., L. Thomas & N.S. Kumar. 2002. Field surveys: estimating absolute densities of prey species using line transect sampling. Pp 111-120 in Monitoring Tigers and Their Prey. K.U. Karanth & J.D. Nichols, editors. Centre for Wildlife Studies, India.
- Buckland, S.T., L. Thomas, F.F.C. Marques, S. Strindberg, S.L. Hedley, J.H. Pollard, D.L. Borchers & M.L. Burt. 2002. Distance sampling: recent advances and future directions. P79-97 in Quantitative Methods for Current Environmental Issues. V. Barnett, A. El.Shaarawi, C. Anderson and P. Chatwin, editors. Springer-Verlag.
- Buckland, S.T., D.R. Anderson, K.P. Burnham, J.L. Laake, D.L. Borchers & L. Thomas. 2001. Introduction to Distance Sampling. Oxford University Press.
- Steidl, R.J. & L. Thomas. 2001. Power analysis and experimental design. Pp 14-36 in Design and Analysis of Ecological Experiments, 2nd edition. S. Scheiner and J. Gurevitch, editors. Oxford University Press.
- Thomas, L. 1999. Distance 3.5. Bulletin of the Ecological Society of America 80(2): 114-115.
- Thomas, L. & C. Krebs. 1997. A review of power analysis software. Bulletin of the Ecological Society of America 78(2): 128-139.
Unpublished and technical reports
- Cabrelli, A., J. Harwood, J. Matthiopoulos, L. New and L. Thomas. 2009. A critical review of the literature on population modelling. Final report to the Joint Industry Project of the International Association of Oil and Gas Producers on contract JIP22 07_20. July 2009.
- Thomas, L. 2008. Potential use of Joint Cetacean Protocol data for determining changes in species' range and abundance: exploratory analysis of southern Irish Sea data. Report to Joint Nature Conservation Committee, National Parks and Wildlife Service, and Countryside Council for Wales. JNCC Contract No. F90-01-1208. Dated June 2008, revised January 2009.
- Thomas, L. and J. Harwood. 2008. Estimating the size of the UK grey seal population between 1984 and 2007. NERC Special Committee on Seals Briefing Paper 08/3.
- Thomas, L., T. Marques, D. Borchers, C. Stephenson, D. Moretti, R. Morrissey, N. DiMarzio, J. Ward, D. Mellinger, S. Martin and P. Tyack. 2007. DECAF - Density Estimation for Cetaceans from passive Acoustic Fixed sensors. Annual Report to National Oceanographic Partnership Program for period 1 Oct 2007 - 30 Sept 2008.
- Thomas, L., M.O. Hammill and W.D. Bowen. 2007. Estimated size of the Northwest Atlantic grey seal population 1977-2007. Canadian Science Advisory Secretariat Research Document 2007/082.
- Thomas, L. and J. Harwood. 2007. Estimating the size of the UK grey seal population between 1984 and 2006. NERC Special Committee on Seals Briefing Paper 07/3.
- Thomas, L., T. Marques, D. Borchers, C. Stephenson, D. Moretti, R. Morrissey, N. DiMarzio, J. Ward, D. Mellinger, S. Martin and P. Tyack. 2007. DECAF - Density Estimation for Cetaceans from passive Acoustic Fixed sensors. Annual Report to National Oceanographic Partnership Program for period 1 Oct 2006 - 30 Sept 2007.
- Lynam, C. R. King, L. Thomas, S.T. Buckland. 2007. Incorporating Model Uncertainty into the Sequential Importance Sampling Framework using a Model Averaging Approach, or Trans-Dimensional Sequential Importance Sampling. CREEM Technical Report 2007-6.
- Matthiopoulos, J., L. Thomas, B. McConnell, C.D. Duck, D. Thompson, P. Pomeroy, J. Harwood, E.J. Milner-Gulland, N. Wolf and M. Mangel. 2006. Putting long-term, population monitoring data to good use: the causes of density dependence in UK grey seals. NERC Special Committee on Seals Briefing Paper 06/8.
- Thomas, L. and J. Harwood. 2006. Estimating the size of the UK grey seal population between 1984 and 2005, and related research. NERC Special Committee on Seals Briefing Paper 06/3.
- Thomas, L. and J. Harwood. 2005. Estimating the size of the UK grey seal population between 1984 and 2004: model selection, survey effort and sensitivity to priors. NERC Special Committee on Seals Briefing Paper 05/3.
- Thomas, L., T. van Lamsweerde and J. Harwood. 2004. The nature of density dependence in British grey seal populations. NERC Special Committee on Seals Briefing Paper 04/4.
- Thomas, L. and J. Harwood. 2004. A comparison of grey seal population models incorporating density dependent pup survival and fecundity. NERC Special Committee on Seals Briefing paper 04/6.
- Thomas, L. and J. Harwood. 2004. Possible impacts on the Brisith grey seal population of deliberate killing related to salmon farming. NERC Special Committee on Seals Briefing paper 04/7.
- Matthiopoulos, J. J. Harwood and L. Thomas. 2003. Modelling the short-term movements of grey seals between breeding colonies and their long-term population consequences. NERC Special Committee on Seals Briefing paper 03/12.
Thomas, L. and J. Harwood. 2003. Estimating grey seal population size using a Bayesian state-space model. NERC Special Committee on Seals Briefing paper 03/3.
Northridge, S. and L. Thomas 2003. Monitoring levels required in European Fisheries to assess cetacean bycatch, with particular reference to UK fisheries. Report to DEFRA.
D.L. Borchers and L. Thomas. 2003. Incorporating dual-observer methods into software Distance: preliminary work. DFO project 41207-110-178-4802-90618.
Thomas, L., R. Beyers, J. Hart and S.T. Buckland. 2001. Recommendations for a survey design for the Central African forest region. Monitoring Illegal Killing of Elephants Central African Pilot Project, Technical Report 1.
Beyers, R., L. Thomas, J. Hart and S.T. Buckland. 2001. Recommendations for ground-based survey methods for elephants in the Central African forest region. Monitoring Illegal Killing of Elephants Central African Pilot Project, Technical Report 2.
Thomas, L. 2001. Consultancy Report. WCS-India Ungulate Density Project.
Thomas, L. 2001. Development of statistical procedures and software for long-term monitoring of birds in National Parks. U.S. National Parks Service P2370000005.
Thomas, L. 1997. Evaluation of statistical methods for estimating long term population change from extensive wildlife surveys. PhD Thesis, University of British Columbia.
Theses I have (co-)supervised
- Brady, I.J. 2009. Increasing the efficiency of Insights discovery questionnaires. MSc in Applied Statistics and Datamining, University of St Andrews.
- Kidney, D. 2009. Line transect sampling using triangulation: investigating the effect of bearing error on density estimation. MSc in Statistics, University of St Andrews.
- Bishop, J.R.B. 2009. Embedding population dynamics in mark-recapture models. PhD in Statistics, University of St Andrews.
- Faustino, C.E.S. 2008. Designing a shipboard line transect survey to estimate cetacean abundance off the Azores Archipelago, Portugal. MRes in Marine Mammal Science, University of St Andrews.
- DiTraglia, F.J. 2007. Models of Random Wildlife Movement with an Application to Distance Sampling. MMaths Statistics, University of St Andrews.
- Photopoulos, T. 2007. Behavioural changes of a long-ranging diver in response to oceanographic conditions. MRes in Environmental Biology, University of St Andrews.
- Gangadharan, A. 2005. Density Estimation and Time Trend Analysis of Large Herbivores in Nagarhole, India. MRes in Environmental Biology, University of St Andrews.
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