Mammal Research

, Volume 61, Issue 1, pp 1–11 | Cite as

Mapping the spatial configuration of hybridization risk for an endangered population of the European wildcat (Felis silvestris silvestris) in Scotland

  • Kerry Kilshaw
  • Robert A. Montgomery
  • Ruairidh D. Campbell
  • David A. Hetherington
  • Paul J. Johnson
  • Andrew C. Kitchener
  • David W. Macdonald
  • Joshua J. Millspaugh
Original Paper

Abstract

The wildcat in Scotland, UK, is currently at risk of extinction because of hybridization with feral domestic cats (ferals) and hybrids (wildcat × domestic cat crosses). Conservation efforts are hampered by limited information on the distribution of these three cat types and the spatial variation in hybridization risk. From January 2010 to July 2013, we conducted widespread camera-trapping surveys throughout northern Scotland to document the distribution of ferals, hybrids, and wildcats. Using single-season occupancy models, we predicted the probability of occupancy for these three cat types across Scotland. Over 49,031 camera-trapping days, we had 87 captures (photo of a cat at a camera-trap station within a 24-h period) of wildcats, 145 captures of hybrids, and 193 captures of ferals. At over 48 % of the camera-trap stations where we detected wildcats, we also detected ferals or hybrids. We predicted wildcat occupancy as a function of habitat covariates. Wildcat occupancy probability increased in habitat with a higher proportion of mixed woodland habitat and decreased in habitat with more edge (transition from closed to open habitats). Hybrids showed a clear overlap in their distribution pattern with both ferals and wildcats. The results indicate that wildcats in Scotland are at risk of hybridization across much of their current distribution from ferals and/or hybrids. In particular, hybrids have an increased probability of occupying much of the same habitat as wildcats compared to ferals, supporting recent suggestions that hybrids may pose a significant additional hybridization threat by facilitating gene flow between wildcats and ferals.

Keywords

Camera-trap Distribution Felis silvestris silvestris Hybridization Occupancy Wildcat 

References

  1. Ahumada JA, Hurtado J, Lizcano D (2013) Monitoring the status and trends of tropical forest terrestrial vertebrate communities from camera trap data: a tool for conservation. PLoS ONE 8, e73707. doi:10.1371/journal.pone.0073707 PubMedPubMedCentralCrossRefGoogle Scholar
  2. Allendorf FW, Leary RF, Spruell P, Wenburg JK (2001) The problems with hybrids: setting conservation guidelines. Trends Ecol Evol 16:613–622CrossRefGoogle Scholar
  3. Anile S, Bizzarri L, Ragni B (2007) Experiences obtained from camera trapping the wildcat in Sicily (Italy) Hystrix Italian. J Mammal Suppl V Eur Congress Mammal 294Google Scholar
  4. Anile S, Bizzarri L, Ragni B (2009) Camera trapping the European wildcat (Felis silvestris silvestris) in Sicily (southern Italy): preliminary results Hystrix. Ital J Mammal 20:55–60Google Scholar
  5. Balharry D (1993) Factors affecting the distribution and population density of pine martens (Martes martes L.) in Scotland. University of Aberdeen, AberdeenGoogle Scholar
  6. Balharry D, Daniels MJ (1998) Wild living cats in Scotland. Edinburgh, ScotlandGoogle Scholar
  7. Balharry E, Staines BW, Marquiss M, Kruuk H (1994) Hybridisation in British mammals. Joint Nature Conservation Committee, PeterboroughGoogle Scholar
  8. Barratt DG (1997) Home range size, habitat utilisation and movement patterns of suburban and farm cats Felis catus. Ecography 20:271–280CrossRefGoogle Scholar
  9. Birks JDS, Messenger JE, Halliwell EC (2005) Diversity of den sites used by pine martens Martes martes: a response to the scarcity of arboreal cavities? Mammal Rev 35:313–320CrossRefGoogle Scholar
  10. Biró Z, Szemethy L, Heltai M (2004) Home range size of wildcats (Felis sylvestris) and feral domestic cats (Felis sylvestris f. catus) in a hilly region of Hungary. Mamm Biol 69:302–310Google Scholar
  11. Burnham KP, Anderson DR (2002) Model selection and multimodal inference, a practical information-theoretic approach, 2nd edn. Springer-Verlag, New YorkGoogle Scholar
  12. Castells A, Mayo M (1993) Guıa de los mamıferos en libertad de Espana y Portugal. (Guide to the wild mammals of Spain and Portugal: In Spanish). Madrid: PiramideGoogle Scholar
  13. Corbett LK (1979) Feeding ecology and social organization of wild cats (Felis silvestris) and domestic cats (Felis catus) in Scotland. University of Aberdeen, PhD Thesis, 334 pp.Google Scholar
  14. Cove MV, Spínola RM, Jackson VL, Sáenz JC, Chassot O (2013) Integrating occupancy modelling and camera-trap data to estimate medium and large mammal detection and richness in a Central American biological corridor. Trop Conserv Sci 6:781–795Google Scholar
  15. Daniels MJ (1997) The biology and conservation of the wildcat in Scotland. PhD, University of OxfordGoogle Scholar
  16. Daniels MJ, Beaumont MA, Johnson PJ, Balharry D, Macdonald DW, Barratt E (2001) Ecology and genetics of wild-living cats in the north-east of Scotland and the implications for the conservation of the wildcat. J Appl Ecol 38:146–161CrossRefGoogle Scholar
  17. Davies AR, Gray D (2010) The distribution of Scottish wildcats (Felis silvestris) in Scotland (2006–2008). Natural Heritage Commissioned Report No. 360Google Scholar
  18. Easterbee N, Hepburn LV, Jefferies DJ (1991) Survey of the status and distribution of the wildcat in Scotland, 1983–1987. Nature Conservancy Council for Scotland, EdinburghGoogle Scholar
  19. Fiske I, Chandler RB (2011) unmarked: an R package for fitting hierarchical models of wildlife occurrence and abundance. J Stat Softw 43:1–23CrossRefGoogle Scholar
  20. Germain E, Benhamou S, Poulle M-L (2008) Spatio-temporal sharing between the European wildcat, the domestic cat and their hybrids. J Zool 276:195–203CrossRefGoogle Scholar
  21. Hetherington D, Campbell R (2012) The cairngorms wildcat project final report. Report to Cairngorms National Park Authority, Scottish Natural Heritage, Royal Zoological Society of Scotland, Scottish Gamekeepers Association and Forestry Commission ScotlandGoogle Scholar
  22. Hubbard AL, McOrist S, Jones TW, Boid R, Scott R, Easterbee N (1992) Is survival of European wildcats Felis silvestris in Britain threatened by interbreeding with domestic cats? Biol Conserv 61:203–208CrossRefGoogle Scholar
  23. Jerosch S, Götz M, Klar N, Roth M (2010) Characteristics of diurnal resting sites of the endangered European wildcat (Felis silvestris silvestris): implications for its conservation. J Nat Conserv 18:45–54CrossRefGoogle Scholar
  24. Kéry M, Guillera-Arroita G, Lahoz-Monfort JJ (2013) Analysing and mapping species range dynamics using occupancy models. J Biogeogr 40:1463–1474. doi:10.1111/jbi.12087 CrossRefGoogle Scholar
  25. Kéry M, Royle JA, Schmid H (2005) Modeling avian abundance from replicated counts using binomial mixture models. Ecol Appl 15:1450–1461Google Scholar
  26. Kilshaw K, Johnson PJ, Kitchener AC, MacDonald DW (2015) Detecting the elusive Scottish wildcat Felis silvestris silvestris using camera trapping. Oryx 49:207–215. doi:10.1017/S0030605313001154 CrossRefGoogle Scholar
  27. Kitchener AC (1995). The Wildcat. The Mammal Society, LondonGoogle Scholar
  28. Kitchener AC, Yamaguchi N, Ward JM, Macdonald DW (2005) A diagnosis for the Scottish wildcat (Felis silvestris): a tool for conservation action for a critically-endangered felid. Anim Conserv 8:223–237CrossRefGoogle Scholar
  29. Klar N, Fernandez N, Kramer-Schadt S, Herrmanne M, Trinzenf M, Buttnerf I, Niemitz C (2008) Habitat selection models for European wildcat conservation. Biol Conserv 141:308–319CrossRefGoogle Scholar
  30. Levin DA (2002) Hybridization and extinction. Am Sci 90:254–261CrossRefGoogle Scholar
  31. Liberg O, Sandell M (1988) Spatial organisation and reproductive tactics in the domestic cat and other felids. In: Turner DC, Bateson P (eds) The domestic cat: the biology of its behaviour. Cambridge University Press, Cambridge, pp 83–98Google Scholar
  32. Littlewood NA et al. (2014) Survey and scoping of Wildcat priority areas. Scottish Natural Heritage Commissioned Report No. 768Google Scholar
  33. Lozano J, Moleon M, Virgos E (2006) Biogeographical patterns in the diet of the wildcat, Felis silvestris Schreber, in Eurasia: factors affecting the trophic diversity. J Biogeogr 33:1076–1085CrossRefGoogle Scholar
  34. Macdonald DW, Daniels MJ, Driscoll C, Kitchener A, Yamaguchi N (2004) The Scottish wildcat: analyses for conservation and an action plan. Wildlife Conservation Research Unit, University of OxfordGoogle Scholar
  35. Mackenzie DI, Nichols JD, Lachman GB, Droege S, Royle JA, Langtimm CA (2002) Estimating site occupancy rates when detection probabilities are less than one. Ecology 83:2248–2255CrossRefGoogle Scholar
  36. MacKenzie DI, Nichols JD, Royle JA, Pollock KH, Bailey LA, Hines JE (2006) Occupancy modeling and estimation. Academic, San DiegoGoogle Scholar
  37. Malo AF, Lozano J, Virgos E, Huertas DL (2004) A change of diet from rodents to rabbits (Oryctolagus cuniculus). Is the wildcat (Felis silvestris) a specialist predator? J Zool 263:401–407CrossRefGoogle Scholar
  38. Mazerolle M (2014) AICcmodavg: model selection and multimodel inference based on (Q) AIC. R package version 2.00. http://cran.r-project.org/web/packages/AICcmodavg/index.html. Accessed 1 June 2014
  39. MET (2012) Met Office climate data. www.metoffice.gov.uk/climate/uk/ns/ Accessed on 12th Jan 2012
  40. MLURI (1993) The land cover of Scotland 1988: final report. Macaulay Land Use Research Institute, Aberdeen, UKGoogle Scholar
  41. Monterroso P, Brito JC, Ferreras P, Alves PC (2009) Spatial ecology of the European wildcat in a Mediterranean ecosystem: dealing with small radio-tracking datasets in species conservation. J Zool 279:27–35. doi:10.1111/j.1469-7998.2009.00585.x CrossRefGoogle Scholar
  42. Nowell K, Jackson P (eds) (1996) Status survey and conservation action plan: wild cats. IUCN, GlandGoogle Scholar
  43. O’Brien TG (2008) On the use of automated cameras to estimate species richness for large- and medium-sized rainforest mammals. Anim Conserv 11:179–181CrossRefGoogle Scholar
  44. Oliveira R, Godinho R, Randi E, Alves PC (2008) Hybridization versus conservation: are domestic cats threatening the genetic integrity of wildcats (Felis silvestris silvestris) in Iberian Peninsula? Philos Trans R Soc B 363:2953–2961CrossRefGoogle Scholar
  45. Parent GH (1975) La migration récente à caractère invasionnel du chat sauvage Felis silvestris Schreber en Lorraine belge. [Recent colonization of the wildcat Felis silvestris silvestris Schreber in Belgian Lorraine.] (in French). Mammalia 39:251–288CrossRefGoogle Scholar
  46. Peterson AL, Gallagher LA, Huberman D, Mulder I (2011) Seeing REDD: conserving biodiversity and reducing emissions by avoiding deforestation. J Sustain For 31:2–3Google Scholar
  47. Pierpaoli M et al (2003) Genetic distinction of wildcat (Felis silvestris) populations in Europe, and hybridization with domestic cats in Hungary. Mol Ecol 12:2585–2598PubMedCrossRefGoogle Scholar
  48. Randi E, Pierpaoli M, Beaumont M, Ragni B, Sforzi A (2001) Genetic identification of wild and domestic cats (Felis silvestris) and their hybrids using Bayesian clustering methods. Mol Biol Evol 18:1679–1693PubMedCrossRefGoogle Scholar
  49. Rhymer JM, Simberloff D (1996) Extinction by hybridization and introgression. Annu Rev Ecol Syst 27:83–109CrossRefGoogle Scholar
  50. Rushton SP, Ormerod SJ, Kerby G (2004) New paradigms for modelling species distributions? J Appl Ecol 41:193–200CrossRefGoogle Scholar
  51. Schauenberg P (1981) Elements d’ecologie du Chat forestier d’Europe (Felis sylvestris Schreber, 1777) [Elements of ecology of the wild cat of Europe] (in French). Rev Ecol-Terre Vie 35:3–36Google Scholar
  52. Scott R, Easterbee N, Jefferies D (1993) A radio-tracking study of wildcats in western Scotland. In: Proc. seminar on the biology and conservation of the wildcat (Felis silvestris), Nancy, France. Council of Europe, Strasbourg, pp 94–97Google Scholar
  53. SCROL (2011) Scotland’s Census Results OnLine: www.scrol.gov.uk Accessed 12th Jan 2014
  54. Silva AP, Kilshaw K, Johnson PJ, MacDonald DW, Rosalino LM, Silva AP, Kilshaw K, Johnson PJ, MacDonald DW, Rosalino LM (2013) Wildcat occurrence in Scotland: food really matters. Divers Distrib. doi:10.1111/ddi.12018 Google Scholar
  55. Stahl P, Artois M (1991) Status and conservation of the wildcat in Europe and around the Mediterranean rim. Strasbourg, Council of EuropeGoogle Scholar
  56. Stahl P, Leger F (1992) Le chat sauvage (Felis silvestris, Schreber, 1777). In: Artois M, Maurin H (eds) Encyclopédie des Carnivores de France. Société Française pour l’Etude et la Protection des Mammifères (S.F.E.P.M.)Google Scholar
  57. Stahl P, Artois M, Aubert MFA (1988) Organisation spatiale et déplacements des chat forestiers adultes (Felis silvestris, Schreber, 1777 en Lorraine. [Spatial organization and displacement of adult forest wildcats (Felis silvestris Schreber, 1777) in Lorraine.] (in French). Terre et Vie 43:113–132Google Scholar
  58. Suminski P (1962) Research in the native form of the wildcat (Felis silvestris Schreber) on the background of its geographical distribution. Folia Forestalia Polenica 8:1–81Google Scholar
  59. Symonds MRE, Moussalli A (2011) A brief guide to model selection, multimodel inference and model averaging in behavioural ecology using Akaike’s information criterion. Behav Ecol Sociobiol 65:13–21CrossRefGoogle Scholar
  60. Szemethy L (1993) The actual status of wildcat (Felis silvestris) in Hungary. In: Seminar on the biology and conservation of the wildcat (Felis silvestris), Nancy, France, 23–25 September 1992. Council of Europe, Strasbourg. p 52Google Scholar
  61. Weber D (2008) Monitoring Wildcats (Felis silvestris silvestris) Guidance for a systematic survey of the distribution of wildcats and for monitoring population changes over time (Translated by Hannes Schnell, Helen Armour and Ruth Maier)Google Scholar
  62. Wittmer HU (2001) Home range size, movements, and habitat utilization of three male European wildcats (Felis silvestris Schreber, 1777) in Saarland and Rheinland-Pfalz (Germany). Mamm Biol 66:365–370Google Scholar

Copyright information

© Mammal Research Institute, Polish Academy of Sciences, Białowieża, Poland 2015

Authors and Affiliations

  • Kerry Kilshaw
    • 1
  • Robert A. Montgomery
    • 1
    • 2
  • Ruairidh D. Campbell
    • 3
  • David A. Hetherington
    • 4
  • Paul J. Johnson
    • 1
  • Andrew C. Kitchener
    • 6
    • 7
  • David W. Macdonald
    • 1
  • Joshua J. Millspaugh
    • 5
  1. 1.Wildlife Conservation Research Unit, Recanti-Kaplan Centre, Tubney House, Department of ZoologyUniversity of OxfordOxonUK
  2. 2.Department of Fisheries and WildlifeMichigan State UniversityEast LansingUSA
  3. 3.Royal Zoological Society of ScotlandEdinburgh ZooEdinburghUK
  4. 4.Cairngorms National Park AuthorityGrantown on SpeyUK
  5. 5.Department of Fisheries and Wildlife SciencesUniversity of MissouriColumbiaUSA
  6. 6.Department of Natural SciencesNational Museums ScotlandEdinburghUSA
  7. 7.Institute of Geography, School of GeoSciencesUniversity of EdinburghEdinburghUK

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