Abstract
Capercaillie (Tetrao urogallus) populations are declining in western parts of their range, including Scotland. It has been proposed that their numbers, and the extent of their range in Scotland be increased to reduce the risk of a second extinction in the UK. The feasibility of a reintroduction of capercaillie to coniferous plantations in southern Scotland was assessed by undertaking a population viability analysis. Following a review of capercaillie ecology and habitat requirements, VORTEX population simulation software was used to identify a minimum viable population (MVP). From this the minimum dynamic area of suitable habitat required in order to support such a MVP was then calculated. It was estimated that a minimum of 60 individuals would be required in approximately 5000ha of habitat in order for the population to have a >0.95 probability of surviving for 50 years. Supplementation of populations with two unrelated individuals every five years reduced the MVP to ten individuals. Further simulations were run in order to establish the sensitivity of the model to changes in three key parameters. Assessment of areas of suitable habitat identified two potential release sites, Wauchope and Newcastleton forests, in southern Scotland. Some practical considerations relating to management of a release population are outlined. It was concluded that an appropriately planned and resourced reintroduction was feasible.
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References
Cadbury, C.J. (ed.) (1990) RSPB Conservation Review 1990, Number 4. Sandy, Bedfordshire: RSPB.
Caughley, G. and Gunn, A. (1996) Conservation Biology in Theory and Practice. Cambridge, Massachusetts: Blackwell Science.
Cramp, S. and Simmons, K.E.L. (eds) (1980) The Birds of the Western Palearctic, vol. II. Oxford: Oxford University Press.
Fiedler, P.L. and Jain, S.K. (eds) (1992) Conservation Biology: The Theory and Practice of Nature Conservation, Preservation and Management. New York and London: Chapman and Hall.
Forestry Commission (1994) Borders Forest District Summary. Edinburgh: Forestry Commission.
Gjerde, I. and Wegge, P. (1989) Spacing pattern, habitat use and survival of capercaillie in a fragmented winter habitat. Ornis Scand. 20(3), 219–25.
HMSO (1995) Biodiversity: The UK Steering Group Report-vol. II: Action Plans. London: HMSO.
Höglund, N. (1995) Body temperature, activity and reproduction of the Capercaillie. Viltrevy (Stockholm) 1, 1–87.
Howells, O. and Edwards-Jones, G. (1997) A feasibility study of reintroducing wild boar Sus scrofa to Scotland: are existing woodlands large enough to support a minimum viable population? Biol. Conserv. 81, 77–90.
Jones, A.M. (1982) Aspects of the Ecology and Behaviour of Capercaillie. PhD Thesis, University of Aberdeen.
Lacy, R.C. (1993) VORTEX: a computer simulation model for population viability analysis. Wildl. Res. 20, 45–65.
Lacy, R.C. and Clark, T.W. (1990) Population viability assessment of eastern barred bandicoot. In Management and Conservation of Small Populations (T.W. Clark and J.H. Seebeck, eds) pp. 131–46. Brookfield, Illinois: Chicago Zoological Society.
Lacy, R.C., Flesness, N.R. and Seal, U.S. (1989) Puerto Rican parrot population viability analysis. Report to the US Fish and Wildlife Service. Apple Valley, Minnesota. Captive Breeding Specialist Group, Species Survival Commission, IUCN.
Lacy, R.C., Hughes, K.A. and Miller, P.S. (1995) VORTEX: A Stochastic Simulation of the Extinction Process. Version 7 User's Manual. Apple Valley, Minnesota, USA: IUCN/SSC Conservation Breeding Specialist Group.
Linden, H. (1981) Estimation of juvenile mortality in the capercaillie, Tetrao urogallus, and the black grouse, Tetrao tetrix, from indirect evidence. Finn. Game Res. 39, 35–51.
Lindenmayer, D.B., Lacy, R.C., Thomas, V.C. and Clark, T.W. (1993) Predictions of the impacts of changes in population size and environmental variability on Leadbeater's possum, Gymnobelideus leadbeateri McCoy (Marsupialia: Petauridae) using population viability analysis: an application of the computer program VORTEX. Wildl. Res. 20, 67–86.
Lindenmayer, D.B., Burgman, M.A., Akcakaya, H.R., Lacy, R.C. and Possingham, H.P. (1995) A review of the generic computer programs ALEX, RAMAS/space and VORTEX for modelling the viability of wildlife metapopulations. Ecol. Modell. 82, 161–74.
Macdonald, D.W., Tattersall, F.H., Brown, E.D. and Balharry, D. (1995) Reintroducing the European beaver to Britain-nostalgic meddling or restoring biodiversity. Mammal Rev. 25(4), 161–200.
Mills, S.L. and Allendorf, F.W. (1996) The One-Migrant-per-Generation Rule in conservation and management. Conserv. Biol. 10(6), 1509–18.
Moss, R. (1986) Rain, breeding success and distribution of capercaillie Tetrao urogallus and black grouse Tetrao tetrix in Scotland. Ibis 128, 65–72.
Moss, R. (1987a) Demography of capercaillie Tetrao urogallus in north-east Scotland. II. Age and sex distribution. Orinis Scand. 18, 135–40.
Moss, R. (1987b) Demography of capercaillie Tetrao urogallus in north-east Scotland. III. Production and recruitment of young. Ornis Scand. 18, 141–5.
Moss, R. and Oswald, J. (1985) Population dynamics of capercaillie in a north-east Scottish glen. Ornis Scand. 16, 229–38.
Moss, R. and Picozzi, N. (1994) Management of forests for capercaillie in Scotland. Forestry Commission Bulletin 113. London: HMSO.
Mueller, F. (1981) Experience and conservation strategy projects for capercaillie and black grouse in the Rhöen hills (West Germany). Proc. Int. Symp. on Grouse 2, 49–59. Reading: World Pheasant Association.
Pennie, I.D. (1950) The history and distribution of the capercaillie in Scotland. Scottish Naturalist 62, 65–87.
Picozzi, N., Moss, R. and Catt, D. (1996) Capercaillie habitat, diet and management in a Sitka spruce plantation in central Scotland. Forestry 69(4), 373–88.
Pulliainen, E. (1978) Autumn and winter nutrition of the capercaillie Tetrao urogallus in the Northern Finnish Taiga. Proc. Int. Symp. on Woodland Grouse 1, 92–7. Reading: World Pheasant Association.
Ralls, K., Ballou, J.D. and Templeton (1988) Estimates of lethal equivalents and the cost of inbreeding in mammals. Conservation Biology 2, 185–93.
Shaffer, M. (1987) Minimum viable populations: coping with uncertainty. In Viable Populations for Conservation (M.E. Soulé, ed.) pp. 69–86. Cambridge: Cambridge University Press.
Simms, E. (1971) Woodland Birds. London: Collins.
Spidsø, T.K. and Stuen, O.H. (1988) Food selection by capercaillie chicks in Southern Norway. Can. J. Zool. 66, 279–83.
Spinney, L. (1995) Return to the wild. New Sci. 14 January, pp. 35–8.
Soulé, M.E. (ed.) (1986) Conservation Biology. The Science of Scarcity and Diversity. Sunderland, Massachusetts: Sinauer Association Inc.
Soulé, M.E. (ed.) (1987) Viable Populations for Conservation. Cambridge: Cambridge University Press.
Storch, I. (1993) Patterns and strategies of winter habitat selection in alpine capercaillie. Ecography 16(4), 351–9.
Storch, I. (1995) Annual home ranges and spacings of capercaillie in Central Europe. J. Wildl. Manag. 59(2), 392–400.
Wegge, P. and Rolstad, J. (1986) Size and spacing of capercaillie leks in relation to social behaviour and habitat. Behav. Ecol. Sociobiol. 19, 401–8.
Zhou, Z. and Pan, W. (1997) Analysis of the viability of a giant panda population. J. Appl. Ecol. 34, 363–74.
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MARSHALL, K., EDWARDS-JONES, G. Reintroducing capercaillie (Tetrao urogallus) into southern Scotland: identification of minimum viable populations at potential release sites. Biodiversity and Conservation 7, 275–296 (1998). https://doi.org/10.1023/A:1008844726747
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DOI: https://doi.org/10.1023/A:1008844726747