Profile

Prof Len Thomas

Prof Len Thomas
Professor of Statistics


 

My main research areas are: (1) Development of methods and software for estimating the size, density and distribution of wild animal and plant populations. I mostly work on a group of related methods called distance sampling. (2) Use of computer intensive methods to fit and compare stochastic models of wildlife population dynamics. Here, I mostly work on algorithms called particle filters. For more details about my work, including links to my publications, please see my personal home page.

source: symbiosis

 

50 (of 67 published available) for lt5 with keyword Ocean clear keyword filter (source: University of St Andrews PURE)
Please click title of any item for full details

Comparing methods suitable for monitoring marine mammals in low visibility conditions during seismic surveys Ursula K. Verfuss, Douglas Michael Gillespie, Jonathan Charles David Gordon, Tiago A. Marques, Brianne Miller, Rachael Plunkett, James A. Theriault, Dominic John Tollit, Daniel P. Zitterbart, Philippe Hubert, Len Thomas
Marine Pollution Bulletin 2018 vol.126 pp.1-18
Estimating effective detection area of static passive acoustic data loggers from playback experiments with cetacean vocalisations Hanna K. Nuuttila, Katharina Brundiers, Michael Dähne, Jens C. Koblitz, Len Thomas, Winnie Courtene-Jones, Peter G. H. Evans, John R. Turner, Jim D. Bennell, Jan G. Hiddink
Methods in Ecology and Evolution 2018 vol.9 pp.2362-2371
Fin whale density and distribution estimation using acoustic bearings derived from sparse arrays Danielle Harris, Jennifer L. Miksis-Olds, Julia A. Vernon, Len Thomas
Journal of the Acoustical Society of America 2018 vol.143 pp.2980-2993
Marine mammals and sonar Catriona M Harris, Len Thomas, Erin Falcone, John Hildebrand, Dorian Houser, Petter Kvadsheim, Frans-Peter A. Lam, Patrick Miller, David J. Moretti, Andrew Read, Hans Slabbekoorn, Brandon L. Southall, Peter Lloyd Tyack, Douglas Wartzok, Vincent Janik
Journal of Applied Ecology 2018 vol.55 pp.396-404
Modelling the broadband propagation of marine mammal echolocation clicks for click-based population density estimates Alexander von Benda-Beckmann, Len Thomas, Peter Lloyd Tyack, Michael Ainslie
Journal of the Acoustical Society of America 2018 vol.143 pp.954-967
Understanding the population consequences of disturbance Enrico Pirotta, Daniel P. Costa, Erica Fleishman, Scott D. Kraus, David Lusseau, David Moretti, Leslie Frances New, Robert Schilling Schick, Lisa K. Schwarz, Samantha E. Simmons, Len Thomas, Peter Lloyd Tyack, Michael J. Weise, Randall S. Wells, John Harwood
Ecology and Evolution vol.Early View
Assigning stranded bottlenose dolphins to source stocks using stable isotope ratios following the Deepwater Horizon oil spill A A Hohn, Len Thomas, R. H. Carmichael, J. Litz, C. Clemons-Chevis, S. F. Shippee, C. Sinclair, S. Smith, T. R. Speakman, M. C. Tumlin, E. S. Zolman
Endangered Species Research 2017 vol.33 pp.235-252
Estimation bias under model selection for distance sampling detection functions Len Thomas, Tiago A. Marques
Environmental and Ecological Statistics 2017 vol.24 pp.399-414
Extinction is imminent for Mexico’s endemic porpoise unless fishery bycatch is eliminated Barbara L Taylor, Lorenzo Rojas-Bracho, Jeffrey Moore, Armando Jaramillo-Legorreta, Jay M Ver Hoef, Gustavo Cardenas-Hinojosa, Edwyna Nieto-Garcia, Jay Barlow, Tim Gerrodette, Nicholas Tregenza, Len Thomas, Philip Steven Hammond
Conservation Letters 2017 vol.10 pp.588-595
Individual, ecological, and anthropogenic influences on activity budgets of long-finned pilot whales Saana Isojunno, Dinara Sadykova, Stacy Lynn De Ruiter, Charlotte Curé, Fleur Visser, Len Thomas, Patrick Miller, Catriona M Harris
Ecosphere 2017 vol.8
Last call: Passive acoustic monitoring shows continued rapid decline of critically endangered vaquita Len Thomas, Armando Jaramillo-legorreta, Gustavo Cardenas-hinojosa, Edwyna Nieto-garcia, Lorenzo Rojas-bracho, Jay M. Ver Hoef, Jeffrey Moore, Barbara Taylor, Jay Barlow, Nicholas Tregenza
Journal of the Acoustical Society of America 2017 vol.142 pp.EL512-EL517
Model-based approaches to deal with detectability Tiago A. Marques, Len Thomas, Marc Kery, Stephen Terrence Buckland, David Louis Borchers, Eric Rexstad, Rachel M. Fewster, Darryl I. Mackenzie, J. Andrew Royle, Gurutzeta Guillera-Arroita, Colleen M. Handel, David C. Pavlacky, Richard Joseph Camp
Ecological Applications 2017 vol.27 pp.1694-1698
Quantifying injury to common bottlenose dolphins from the Deepwater Horizon oil spill using an age-, sex- and class-structured population model Lori H. Schwacke, Len Thomas, Randall S Wells, Wayne E. McFee, Aleta A. Hohn, Keith D. Mullin, Eric S. Zolman, Brian M. Quigley, Teri K. Rowles, John H. Schwacke
Endangered Species Research 2017 vol.33 pp.265-279
Spatio-temporal variation in click production rates of beaked whales Victoria E. Warren, Tiago A. Marques, Danielle Harris, Len Thomas, Peter Lloyd Tyack, Natacha Aguilar de Soto, Mark Johnson
Journal of the Acoustical Society of America 2017 vol.141 pp.1962-1974
Statistical modelling of individual animal movement Toby A Patterson, Alison Parton, Roland Langrock, Paul G. Blackwell, Len Thomas, Ruth King
Advances in Statistical Analysis 2017 vol.101 pp.399-438
Survival, density, and abundance of common bottlenose dolphins in Barataria Bay (USA) following the Deepwater Horizon oil spill Trent L. McDonald, Fawn E. Hornsby, Todd R. Speakman, Eric S. Zolman, Keith D. Mullin, Carrie Sinclair, Patricia E. Rosel, Len Thomas, Lori H. Schwacke
Endangered Species Research 2017 vol.33 pp.193-209
Techniques for estimating the size of low-density gopher tortoise populations Jonathan M. Stober, Lora L. Smith, Tiago A. Marques, Len Thomas
Journal of Fish and Wildlife Management 2017 vol.8 pp.377-386
Whale distribution in a breeding area Daniel Danilewicz, Philip Steven Hammond, Len Thomas, Alexandre N Zerbini
Marine Ecology Progress Series 2017 vol.585 pp.213-227
Where were they from? Modelling the source stock of dolphins stranded after the Deepwater Horizon oil spill using genetic and stable isotope data Len Thomas, P E Rosel, A. Hohn, J. Litz, L H Schwacke
Endangered Species Research 2017 vol.33 pp.253-264
An efficient acoustic density estimation method with human detectors applied to gibbons in Cambodia Benjamin M. Rawson, David Louis Borchers, Ben Stevenson, Tiago A. Marques, Len Thomas
PLoS One 2016 vol.11 pp.1-16
Delphinid echolocation click detection probability on near-seafloor sensors Kaitlin E. Frasier, Sean M. Wiggins, Danielle Harris, Tiago A. Marques, Len Thomas, John A. Hildebrand
Journal of the Acoustical Society of America 2016 vol.140 pp.1918-1930
Estimating Key Largo woodrat abundance using spatially explicit capture–recapture and trapping point transects Stephen Terrence Buckland, Len Thomas, Anne Savage
Wildlife Society Bulletin 2016 vol.40 pp.331-338
From physiology to policy Natacha Aguilar de Soto, Sascha Kate Hooker, Saana Isojunno, Mark Johnson, Patrick Miller, Peter Lloyd Tyack, Paul Wensveen, Carl Robert Donovan, Catriona M Harris, Danielle Harris, Laura Helen Marshall, Cornelia Sabrina Oedekoven, Rocio Prieto, Len Thomas
Proceedings of Meetings on Acoustics 2016 vol.27
Gauging allowable harm limits to cumulative, sub-lethal effects of human activities on wildlife Rob Williams, Len Thomas, Christopher W. Clark, Philip Steven Hammond
Marine Policy 2016 vol.70 pp.58-64
Marine Strategy Framework Directive. Estimating the European Grey Seal population Debbie JF Russell, Nora Nell Hanson, Len Thomas
2016
The challenges of analyzing behavioral response study data Catriona M Harris, Len Thomas, Dinara Sadykova, Stacy Lynn De Ruiter, Peter Lloyd Tyack, Brandon L. Southall, Andrew J. Read, Patrick Miller
2016 pp.399-407
A description of LATTE outputs Tiago A. Marques, Len Thomas
2015
A path reconstruction method integrating dead-reckoning and position fixes applied to humpback whales Paul Wensveen, Len Thomas, Patrick Miller
Movement Ecology 2015 vol.3
A unifying model for capture-recapture and distance sampling surveys of wildlife populations David Louis Borchers, Ben Stevenson, Len Thomas, Tiago A. Marques
Journal of the American Statistical Association 2015 vol.110 pp.195-204
Dose response severity functions for acoustic disturbance in cetaceans using recurrent event survival analysis Catriona M Harris, Dinara Sadykova, Stacy Lynn De Ruiter, Peter Lloyd Tyack, Patrick Miller, Petter Kvadsheim, Frans-Peter Lam, Len Thomas
Ecosphere 2015 vol.6
Efficient abstracting of dive profiles using a broken-stick model Theoni Photopoulou, Philip Lovell, Mike Fedak, Len Thomas, Jason Matthiopoulos
Methods in Ecology and Evolution 2015 vol.6 pp.278-288
Impacts of anthropogenic noise on marine life Andrew J Wright, LK Blight, R Bruintjes, R Canessa, CW Clark, S Cullis-Suzuki, DT Dakin, C Erbe, Philip Steven Hammond, MD Merchant, PD O'Hara, J Purser, AN Radford, SD Simpson, Len Thomas, MA Wale
Ocean and Coastal Management 2015 vol.115 pp.17-24
Inter-annual and seasonal trends in cetacean distribution, density and abundance off southern California G.S. Campbell, Len Thomas, K. Whitaker, A.B. Douglas, J. Calambokidis, J.A. Hildebrand
Deep Sea Research Part II: Topical Studies in Oceanography 2015 vol.112 pp.143-157
Passive acoustic monitoring of beaked whale densities in the Gulf of Mexico John Hildebrand, Simone Baumann-Pickering, Kaitlin Frasier, Jennifer Trickey, Karlina Merkens, Sean Wiggins, Mark McDonald, Lance Garrison, Danielle Harris, Tiago A. Marques, Len Thomas
Scientific Reports 2015 vol.5
Procedure description Tiago A. Marques, Jessica Shaeffer, Len Thomas
2015
The effect of animal movement on line transect estimates of abundance Richard Glennie, Stephen Terrence Buckland, Len Thomas
PLoS One 2015 vol.10
Tracking marine mammals in 3D using electronic tag data C. Laplanche, Tiago A. Marques, Len Thomas
Methods in Ecology and Evolution 2015 vol.6 pp.987-996
Dose-response relationships for the onset of avoidance of sonar by free-ranging killer whales Patrick Miller, Ricardo Nuno Antunes, Paul Wensveen, Filipa Isabel Pereira Samarra, Ana Catarina De Carvalho Alves, Peter Lloyd Tyack, Petter H. Kvadsheim, Lars Kleivane, Frans-Peter A. Lam, Michael A. Ainslie, Len Thomas
Journal of the Acoustical Society of America 2014 vol.135 pp.975-993
Modelling population dynamics Ken Newman, Stephen Terrence Buckland, Byron Morgan, Ruth King, David Louis Borchers, Diana Cole, Panagiotis Besbeas, Olivier Gimenez, Len Thomas
2014
Spatial variation in maximum dive depth in gray seals in relation to foraging. Theoni Photopoulou, Mike Fedak, Len Thomas, Jason Matthiopoulos
Marine Mammal Science 2014 vol.30 pp.923–938
Statistical ecology comes of age Olivier Gimenez, Stephen Terrence Buckland, Byron J. T. Morgan, Nicolas Bez, Sophie Bertrand, Remi Choquet, Stephane Dray, Marie-Pierre Etienne, Rachel Fewster, Frederic Gosselin, Bastien Merigot, Pascal Monestiez, Juan M. Morales, Frederic Mortier, Francois Munoz, Otso Ovaskainen, Sandrine Pavoine, Roger Pradel, Frank M. Schurr, Len Thomas, Wilfried Thuiller, Verena Trenkel, Perry de Valpine, Eric Rexstad
Biology Letters 2014 vol.10
Using short-term measures of behaviour to estimate long-term fitness of southern elephant seals. Leslie Frances New, James Clark, Daniel Costa, Erica Fleishman, Mark Hindell, Tin Klanjšček, David Lusseau, Scott Kraus, Clive McMahon, Patrick Robinson, Robert Schilling Schick, Lisa Schwartz, Samantha Simmons, Len Thomas, Peter Lloyd Tyack, John Harwood
Marine Ecology Progress Series 2014 vol.496 pp.99-108
Estimating animal population density using passive acoustics Tiago A. Marques, Len Thomas, Stephen Martin, David Mellinger, Jessica Ward, David Moretti, Danielle Harris, Peter Lloyd Tyack
Biological Reviews of the Cambridge Philosophical Society 2013 vol.88 pp.287–309
Estimating resource acquisition and at-sea body condition of a marine predator Robert Schilling Schick, Leslie New, Len Thomas, Daniel Costa, Mark Hindell, Clive McMahon, Patrick Robinson, Samantha Simmons, Michele Thums, John Harwood, James Clark
Journal of Animal Ecology 2013 vol.82 pp.1300-1315
Evidence for density-dependent changes in body condition and pregnancy rate of North Atlantic fin whales over four decades of varying environmental conditions Gisli A. Vikingsson, Astthor Gislason, Christina Lockyer, Leslie New, Len Thomas, Philip Steven Hammond
ICES Journal of Marine Science 2013

Contact Details:

Prof Len Thomas
The Observatory
Buchanan Gardens
University of St Andrews
St Andrews
KY16 9LZ
Fife
UK

tel: (44) (0) 1334 461801
fax: (44) (0) 1334 461800
room: 208
email: lt5@st-andrews.ac.uk

Related:

research@st-andrews
Personal Homepage
Centre for Research into Ecological & Environmental Modelling
School of Mathematics & Statistics
National Centre for Statistical Ecology
Scottish Oceans Institute

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Contact

The Secretary
Scottish Oceans Institute
Institiud Chuantan na h-Alba
Gatty Marine Laboratory
East Sands St Andrews
KY16 8LB
Scotland
UK

tel: +44 (0) 1334 463472
fax: +44 (0) 1334 463443
email: soi@st-andrews.ac.uk

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