Abstract
In the past decade, ecologists have witnessed vast improvements in our ability to collect animal movement data through animal-borne technology, such as through GPS or ARGOS systems. However, more data does not necessarily yield greater knowledge in understanding animal ecology and conservation. In this paper, we provide a review of the major benefits, problems and potential misuses of GPS/Argos technology to animal ecology and conservation. Benefits are obvious, and include the ability to collect fine-scale spatio-temporal location data on many previously impossible to study animals, such as ocean-going fish, migratory songbirds and long-distance migratory mammals. These benefits come with significant problems, however, imposed by frequent collar failures and high cost, which often results in weaker study design, reduced sample sizes and poorer statistical inference. In addition, we see the divorcing of biologists from a field-based understanding of animal ecology to be a growing problem. Despite these difficulties, GPS devices have provided significant benefits, particularly in the conservation and ecology of wide-ranging species. We conclude by offering suggestions for ecologists on which kinds of ecological questions would currently benefit the most from GPS/Argos technology, and where the technology has been potentially misused. Significant conceptual challenges remain, however, including the links between movement and behaviour, and movement and population dynamics.
References
Anderson D. P., Forester J. D.& Turner M. G. . 2008When to slow down: elk residency rates on a heterogeneous landscape. J. Mammal. 89, 105–114. (doi:10.1644/07-MAMM-A-035.1). Crossref, ISI, Google ScholarArnemo J., Ahlqvist P., Anderson R., Bernesten F., Ericsson G., Odden J., Brunberg S., Segerstrom P.& Swenson J. . 2006Risk of capture-related mortality in large free-ranging mammals: experiences from Scandanavia. Wildl. Biol. 12, 109–113. (doi:10.2981/0909-6396(2006)12[109:ROCMIL]2.0.CO;2). Crossref, ISI, Google ScholarBarnett A. H.& Moorcroft P. R. . 2008Analytic steady-state space use patterns and rapid computations in mechanistic home range analysis. J. Math. Biol. 57, 139–159. (doi:10.1007/s00285-007-0149-8). Crossref, PubMed, ISI, Google ScholarBartumeus F., Catalan J., Fulco U. L., Lyra M. L.& Viswanathan G. M. . 2002Optimizing the encounter rate in biological interactions: Lévy versus Brownian strategies. Phys. Rev. Lett. 88, 097901. (doi:10.1103/PhysRevLett.88.097901). Crossref, PubMed, ISI, Google ScholarBerger J. . 2004The last mile: how to sustain long-distance migration in mammals. Conserv. Biol. 18, 320–331. (doi:10.1111/j.1523-1739.2004.00548.x). Crossref, ISI, Google ScholarBeyer H. L., Haydon D. T., Morales J. M., Frair J. L., Hebblewhite M., Mitchell M.& Matthiopoulos J. . 2010The interpretation of habitat preference metrics under use-availability designs. Phil. Trans. R. Soc. B 365, 2245–2254. (doi:10.1098/rstb.2010.0083). Link, ISI, Google ScholarBlock B. A., Teo S. L. H., Walli A., Boustany A., Stokesbury M. J. W., Farwell C. J., Weng K. C., Dewar H.& Williams T. D. . 2005Electronic tagging and population structure of Atlantic bluefin tuna. Nature 434, 1121–1127. (doi:10.1038/nature03463). Crossref, PubMed, ISI, Google ScholarBoone R. B., Thirgood S. J.& Hopcraft J. G. C. . 2006Serengeti Wildebeest migratory patterns modeled from rainfall and new vegetation growth. Ecology 87, 1987–1994. (doi:10.1890/0012-9658(2006)87[1987:SWMPMF]2.0.CO;2). Crossref, PubMed, ISI, Google ScholarBörger L., Franconi N., De Michele G., Gantz A., Meschi F.& Manica A. . 2006bEffects of sampling regime on the mean and variance of home range estimates. J. Anim. Ecol. 75, 1393–1405. (doi:10.1111/j.1365-2656.2006.01164.x). Crossref, PubMed, ISI, Google ScholarBoyce M. S., Pitt J., Northrup J. M., Morehouse A. T., Knopff K. H., Cristescu B.& Stenhouse G. B. . 2010Temporal autocorrelation functions for movement rates from global positioning system radiotelemetry data. Phil. Trans. R. Soc. B 365, 2213–2219. (10.1098/rstb.2010.0080). Link, ISI, Google ScholarCagnacci F., Boitani L., Powell R. A.& Boyce M. S. . 2010Animal ecology meets GPS-based radiotelemetry: a perfect storm of opportunities and challenges. Phil. Trans. R. Soc. B 365, 2157–2162. (doi:10.1098/rstb.2010.0107). Link, ISI, Google ScholarChester C. C. . 2006Landscape vision and the Yellowstone to Yukon Conservation Initiative. Conservation across borders: biodiversity in an interdependent world (ed.& Chester C. C. ), pp. 134–157. Washington, DC: Island Press. Google ScholarCooke S. J., Hinch S. G., Wikelski M., Andrews R. D., Kuchel L. J., Wolcott T. G.& Butler P. J. . 2004Biotelemetry: a mechanistic approach to ecology. Trends Ecol. Evol. 19, 334–343. (doi:10.1016/j.tree.2004.04.003). Crossref, PubMed, ISI, Google ScholarCraighead J. J., Sumner J. S.& Mitchell J. A. . 1995The grizzly bears of Yellowstone: their ecology in the Yellowstone ecosystem. New York, NY: Island Press. Google ScholarDalziel B. D., Morales J. M.& Fryxell J. M. . 2008Fitting probability distributions to animal movement trajectories: using artificial neural networks to link distance, resources, and memory. Am. Nat. 172, 248–258. Crossref, PubMed, ISI, Google ScholarDavis R. W., Fuiman L. A., Williams T. M., Collier S. O., Hagey W. P., Kanatous S. B., Kohin S.& Horning M. . 1999Hunting behavior of a marine mammal beneath the Antarctic fast ice. Science 283. (doi:10.1126/science.283.5404.993). Crossref, ISI, Google ScholarDurner G. M., 2009Predicting 21st-century polar bear habitat distribution from global climate models. Ecol. Monogr. 79, 25–58. (doi:10.1890/07-2089.1). Crossref, ISI, Google ScholarDyer S. J., O'Neill J. P., Wasel S. M.& Boutin S. . 2001Avoidance of industrial development by woodland caribou. J. Wildl. Manage. 65, 531–542. Crossref, ISI, Google Scholar- Environment Canada. 2009Scientific review for the identification of critical habitat for Woodland caribou (Rangifer tarandus caribou), Boreal Population, in Canada., pp. 254. Ottawa, ON. Google Scholar
Fieberg J., Matthiopoulos J., Hebblewhite M., Boyce M. S.& Frair J. L. . 2010Correlation and studies of habitat selection: problem, red herring, or opportunity?Phil. Trans. R. Soc. B 365, 2233–2244. (doi:10.1098/rstb.2010.0079). Link, ISI, Google ScholarFortin D., Beyer H., Boyce M. S., Smith D. W., Duchesne T.& Mao J. S. . 2005Wolves influence elk movements: behaviour shapes a trophic cascade in Yellowstone National Park. Ecology 86, 1320–1330. (doi:10.1890/04-0953). Crossref, ISI, Google ScholarFrair J. L., Fieberg J., Hebblewhite M., Cagnacci F., DeCesare N. J.& Pedrotti L. . 2010Resolving issues of imprecise and habitat-biased locations in ecological analyses using GPS telemetry data. Phil. Trans. R. Soc. B 365, 2187–2200. (doi:10.1098/rstb.2010.0084). Link, ISI, Google ScholarFritz H., Said S.& Weimerskirch H. . 2003Scale-dependent hierarchical adjustments of movement patterns in a long-range foraging seabird. Proc. R. Soc. Lond. B 270, 1143–1148. (doi:10.1098/rspb.2003.2350). Link, ISI, Google ScholarGaillard J. M., Hebblewhite M., Loison A., Fuller M., Powell R., Basille M.& Van Moorter B. . 2010Habitat-performance relationships: finding the right metric at a given spatial scale. Phil. Trans. R. Soc. B 365, 2255–2265. (doi:10.1098/rstb.2010.0085). Link, ISI, Google ScholarGarshelis D. L. . 2000Delusions in habitat evaluation: measuring use, selection, and importance. Research techniques in animal ecology: controversies and consequences (eds, Boitani L.& Fuller T. K. ), pp. 111–154. New York, NY: Columbia University Press. Google ScholarGau R. J., 2004Uncontrolled field performance of Televilt GPS-SimplexTM collars on grizzly bears in western and northern Canada. Wildl. Soc. Bull. 32, 693–701. (doi:10.2193/0091-7648(2004)032[0693:UFPOTG]2.0.CO;2). Crossref, ISI, Google ScholarGraham M. D., Douglas-Hamilton I., Adams W. M.& Lee P. C. . 2009The movement of African elephants in a human-dominated land-use mosaic. Anim. Conserv. 12, 445–455. (doi:10.1111/j.1469-1795.2009.00272.x). Crossref, ISI, Google ScholarGriffith B., Douglas D. C., Walsh N. E., Young D. D., McCabe T. R., Russell D. E., White R. G., Cameron R. D.& Whitten R. . 2002The Porcupine Caribou herd. Biological sciences report (eds, Douglas D. C., Reynolds P. E.& Rhode E. B. ). Washington, DC: US Geological Survey, Biological Resources Division. Google ScholarHandcock R. N., Swain D. L., Bishop-Hurley G. J., Patison K. P., Wark T., Valencia P., Corke P.& O'Neill C. J. . 2009Monitoring animal behaviour and environmental interactions using wireless sensor networks, GPS collars and satellite remote sensing. Sensors 9, 3583–3603. Crossref, ISI, Google ScholarHaydon D. T., Morales J. M., Yott A., Jenkins D. A., Rosatte R.& Fryxell J. M. . 2008Socially informed random walks: incorporating group dynamics into models of population spread and growth. Proc. R. Soc. B 275, 1101–1109. (doi:10.1098/rspb.2007.1688). Link, ISI, Google ScholarHebblewhite M. . 2009Linking wildlife populations with ecosystem change: state-of-the-art satellite technology for National park science. Park Sci. 26, 1–14. Google ScholarHebblewhite M.& Merrill E. . 2008Modelling wildlife-human relationships for social species with mixed-effects resource selection models. J. Appl. Ecol. 45, 834–844. (doi:10.1111/j.1365-2664.2008.01466.x). Crossref, ISI, Google ScholarHebblewhite M., Merrill E. H.& McDermid G. . 2008A mutli-scale test of the forage maturation hypothesis for a partially migratory montane elk population. Ecol. Monogr. 78, 141–166. (doi:10.1890/06-1708.1). Crossref, ISI, Google ScholarHirzel A. H.& Le Lay G. . 2008Habitat suitability modelling and niche theory. J. Appl. Ecol. 45, 1372–1381. (doi:10.1111/j.1365-2664.2008.01524.x). Crossref, ISI, Google ScholarHuete A., Didan K., Miura T., Rodriguez E. P., Gao X.& Ferreira L. G. . 2002Overview of the radiometric and biophysical performance of the modis vegetation indices. Remote Sens. Environ. 83, 195–213. (doi:10.1016/S0034-4257(02)00096-2). Crossref, ISI, Google ScholarInman R. M., Wigglesworth R. R., Inman K. H., Schwartz M. K., Brock B. L.& Rieck J. D. . 2004Wolverine makes extensive movements in the greater Yellowstone ecosystem. Northwest Sci. 78, 261–266. ISI, Google ScholarJames M. C., Myers R. A.& Ottensmeyer C. A. . 2005Behaviour of leatherback sea turtles, Dermochelys Coriacea, during the migratory cycle. Proc. R. Soc. B 272, 1547–1555. (doi:10.1098/rspb.2005.3110). Link, ISI, Google ScholarKie J. G., Matthiopoulos J., Fieberg J., Powell R. A., Cagnacci F., Mitchell M. S., Gaillard J. M.& Moorcroft P. R. . 2010The home-range concept: are traditional estimators still relevant with modern telemetry technology?Phil. Trans. R. Soc. B 365, 2221–2231. (doi:10.1098/rstb.2010.0093). Link, ISI, Google ScholarLeban F. A., Wisdom M. J., Garton E. O., Johnson B. K.& Kie J. G. . 2001Effect of sample size on the performance of resource selection analyses. Radio tracking and wildlife populations (eds, Millspaugh J. J.& Marzluff J. M. ), pp. 291–307. New York, NY: Academic Press. Google ScholarLeimgruber P., McShea W. J., Brookes C. J., Bolor-Erdene L., Wemmer C.& Larson C. . 2001Spatial patterns in relative primary productivity and gazelle migration in the eastern steppes of Mongolia. Biol. Conserv. 102, 205–212. (doi:10.1016/S0006-3207(01)00041-6). Crossref, ISI, Google ScholarLindberg M. S.& Walker J. . 2007Satellite telemetry in avian research and management: sample size considerations. J. Wildl. Manage. 71, 1002–1009. (doi:10.2193/2005-696). Crossref, ISI, Google ScholarLittaye A., Gannier A., Laran S.& Wilson J. P. F. . 2004The relationship between summer aggregation of fin whales and satellite-derived environmental conditions in the northwestern Mediterranean Sea. Remote Sens. Environ. 90, 44–52. (doi:10.1016/j.rse.2003.11.017). Crossref, ISI, Google ScholarManly B. F. J., McDonald L. L., Thomas D. L., McDonald T. L.& Erickson W. P. (eds) 2002Resource selection by animals: statistical analysis and design for field studies, 2nd edn.Boston, MA: Kluwer. Google ScholarMauritzen M., Belikov S. E., Boltunov A. N., Derocher A. E., Hansen E., Ims R. A., Wiig O.& Yoccoz N. . 2003Functional responses in polar bear habitat selection. Oikos 100, 112–124. (doi:10.1034/j.1600-0706.2003.12056.x). Crossref, ISI, Google ScholarMcloughlin P. D., Dunford J. S.& Boutin S. . 2005Relating predation mortality to broad-scale habitat selection. J. Anim. Ecol. 74, 701–707. (doi:10.1111/j.1365-2656.2005.00967.x). Crossref, ISI, Google ScholarMerrill E., Sand H., Zimmermann B., McPhee H., Webb N., Hebblewhite M., Wabakken P.& Frair J. L. . 2010Building a mechanistic understanding of predation with GPS-based movement data. Phil. Trans. R. Soc. B 365, 2279–2288. (doi:10.1098/rstb.2010.0077). Link, ISI, Google ScholarMeyburg B. U., Paillat P.& Meyburg C. . 2003Migration routes of Steppe Eagles between Asia and Africa: a study by means of satellite telemetry. Condor 105, 219–227. (doi:10.1650/0010-5422(2003)105[0219:MROSEB]2.0.CO;2). Crossref, ISI, Google ScholarMoll R. J., Millspaugh J. J., Beringer J., Sartwell J.& He Z. . 2007A new ‘view’ of ecology and conservation through animal-borne video systems. Trends Ecol. Evol. 22, 660–668. (doi:10.1016/j.tree.2007.09.007). Crossref, PubMed, ISI, Google ScholarMoorcroft P. R.& Barnett A. . 2008Mechanistic home range models and resource selection analysis: a reconciliation and unification. Ecology 89, 1112–1119. (doi:10.1890/06-1985.1). Crossref, PubMed, ISI, Google ScholarMoorcroft P. R.& Lewis M. A. . 2006Mechanistic home range analysis. Monographs in Population Biology. Princeton, NJ, USA: Princeton University Press. Google ScholarMoorcroft P. R., Lewis M. A.& Crabtree R. L. . 2006Mechanistic home range models capture spatial patterns and dynamics of Coyote territories in Yellowstone. Proc. R. Soc. B 273, 1651–1659. (doi:10.1098/rspb.2005.3439). Link, ISI, Google ScholarMorales J. M., Haydon D. T., Frair J., Holsinger K. E.& Fryxell J. M. . 2004Extracting more from relocation data: building movement models as mixtures of random walks. Ecology 85, 2436–2445. (doi:10.1890/03-0269). Crossref, ISI, Google ScholarMorales J. M., Moorcroft P. R., Matthiopoulos J., Frair J. L., Kie J. G., Powell R. A., Merrill E. H.& Haydon D. T. . 2010Animal movement and population dynamics. Phil. Trans. R. Soc. B 365, 2289–2301. (doi:10.1098/rstb.2010.0082). Link, ISI, Google ScholarMueller T., Olson K. A., Fuller T. K., Schaller G. B., Murray M. G.& Leimgruber P. . 2008In search of forage: predicting dynamic habitats of Mongolian gazelles using satellite-based estimates of vegetation productivity. J. Appl. Ecol. 45, 649–658. (doi:10.1111/j.1365-2664.2007.01371.x). Crossref, ISI, Google ScholarMurray D. L. . 2006On improving telemetry-based survival estimation. J. Wildl. Manage. 70, 1530–1543. (doi:10.2193/0022-541X(2006)70[1530:OITSE]2.0.CO;2). Crossref, ISI, Google ScholarMusiani M., Okarma H.& Jedrzejewski W. . 1998Speed and actual distances travelled by radiocollared wolves in Bialowieza Primeval Forest (Poland). Acta Theriol. 43, 409–416. Crossref, Google ScholarNathan R., Getz W. M., Revilla E., Holyoak M., Kadmon R., Saltz D.& Smouse P. E. . 2008A movement ecology paradigm for unifying organismal movement research. Proc. Natl Acad. Sci. USA 105, 19 052–19 059. (doi:10.1073/pnas.0800375105). Crossref, ISI, Google ScholarOsko T. J., Hiltz M. N., Hudson R. J.& Wasel S. M. . 2004Moose habitat preferences in response to changing availability. J. Wildl. Manage. 68, 576–584. (doi:10.2193/0022-541X(2004)068[0576:MHPIRT]2.0.CO;2). Crossref, ISI, Google ScholarOwen-Smith N., Fryxell J.& Merrill E. H. . 2010Foraging theory upscaled: the behavioural ecology of herbivore movements. Phil. Trans. R. Soc. B 365, 2267–2278. (doi:10.1098/rstb.2010.0095). Link, ISI, Google ScholarPatterson T. A., Thomas L., Wilcox C., Ovaskainen O.& Matthiopoulos J. . 2008State-space models of individual animal movement. Trends Ecol. Evol. 23, 87–94. (doi:10.1016/j.tree.2007.10.009). Crossref, PubMed, ISI, Google ScholarPepin D., Adrados C., Mann C.& Janeau G. . 2004Assessing real daily distance traveled by ungulates using differential GPS locations. J. Mammal. 85, 774–780. (doi:10.1644/BER-022). Crossref, ISI, Google ScholarPolovina J. J., Howell E., Kobayashi D. R.& Seki M. P. . 2001The transition zone chlorophyll front, a dynamic global feature defining migration and forage habitat for marine resources. Progr. Oceanogr. 49, 469–483. (doi:10.1016/S0079-6611(01)00036-2). Crossref, ISI, Google ScholarPost E. S.& Inouye D. W. . 2008Phenology: response, driver, and integrator. Ecology 89, 319–320. (doi:10.1890/07-1022.1). Crossref, PubMed, ISI, Google ScholarPost E., Pedersen C., Wilmers C. C.& Forchhammer M. C. . 2008Warming, plant phenology and the spatial dimension of trophic mismatch for large herbivores. Proc. R. Soc. B 275, 2005–2013. (doi:10.1098/rspb.2008.0463). Link, ISI, Google ScholarRunning S. W., Nemani R. R., Heinsch F. A., Zhao M. S., Reeves M.& Hashimoto H. . 2004A continuous satellite-derived measure of global terrestrial primary production. Bioscience 54, 547–560. (doi:10.1641/0006-3568(2004)054[0547:ACSMOG]2.0.CO;2). Crossref, ISI, Google ScholarSawyer H., Nielson R. M., Lindzey F.& Mcdonald L. L. . 2006Winter habitat selection of mule deer before and during development of a natural gas field. J. Wildl. Manage. 70, 396–403. (doi:10.2193/0022-541X(2006)70[396:WHSOMD]2.0.CO;2). Crossref, ISI, Google ScholarSawyer H., Kauffman M. J.& Nielson R. M. . 2009Influence of well pad activity on winter habitat selection patterns of mule deer. J. Wildl. Manage. 73, 1052–1061. (doi:10.2193/2008-478). Crossref, ISI, Google ScholarSchick R. S., 2008Understanding movement data and movement processes: current and emerging directions. Ecol. Lett. 11, 1338–1350. (doi:10.1111/j.1461-0248.2008.01249.x). Crossref, PubMed, ISI, Google ScholarSkellam J. G. . 1951Random dispersal in theoretical populations. Biometrika 38, 196–218. Crossref, PubMed, ISI, Google ScholarSmouse P., Focardi S., Moorcroft P., Kie J., Forester J.& Morales J. . 2010Stochastic modelling of animal movement. Phil. Trans. R. Soc. B 365, 2201–2211. (doi:10.1098/rstb.2010.0078). Link, ISI, Google ScholarThirgood S., 2004Can parks protect migratory ungulates? The case of the Serengeti Wildebeest. Anim. Conserv. 7, 113–120. (doi:10.1017/S1367943004001404). Crossref, ISI, Google ScholarTomkiewicz S. M., Fuller M. R., Kie J. G.& Bates K. K. . 2010Global positioning system and associated technologies in animal behaviour and ecological research. Phil. Trans. R. Soc. B 365, 2163–2176. (doi:10.1098/rstb.2010.0090). Link, ISI, Google ScholarTurchin P. . 1998Quantitative analysis of movement: measuring and modeling population redistribution in animals and plants. Sunderland, MA: Sinauer Associates, Inc. Google ScholarUrbano F., Cagnacci F., Clement C., Dettki H., Cameron A.& Neteler M. . 2010Wildlife tracking data management: a new vision. Phil. Trans. R. Soc. B 365, 2177–2185. (doi:10.1098/rstb.2010.0081). Link, ISI, Google ScholarWeimerskirch H., Pinaud D., Pawlowski F.& Bost C. A. . 2007Does prey capture induce area-restricted search? A fine-scale study using GPS in a marine predator, the wandering albatross. Am. Nat. 170, 734–743. Crossref, PubMed, ISI, Google ScholarWhittington J., St. Clair C. C.& Mercer G. . 2005Spatial responses of wolves to roads and trails in Jasper National Park. Ecol. Appl. 15, 543–553. (doi:10.1890/03-5317). Crossref, ISI, Google ScholarWittmer H. U., Sinclair A. R. E.& Mclellan B. N. . 2005The role of predation in the decline and extirpation of woodland Caribou. Oecologia 144, 257–267. (doi:10.1007/s00442-005-0055-y). Crossref, PubMed, ISI, Google Scholar