Estimating the contributions of population density and climatic fluctuations to interannual variation in survival of Soay sheep

Journal of Animal Ecology

Volumn 68, Issue 6, 1999, Pages 1235-1247

  Milner, J M ^a,b,d   Elston, D A ^c   Albon, S D ^a  

^a CENTRE FOR ECOLOGY AND HYDROLOGY   (United Kingdom)

^b UNIVERSITY COLLEGE LONDON   (United Kingdom)

^c BIOMATHEMATICS AND STATISTICS SCOTLAND   (United Kingdom)

^d Letterewe Research Project   (United Kingdom)

Author keywords

Density dependence; Density independence; Generalized linear mixed model (GLMM); Logistic regression; North Atlantic oscillation; Over winter mortality

Indexed keywords

CLIMATE VARIATION; DENSITY DEPENDENCE; POPULATION DENSITY; SHEEP; SURVIVAL;

SAINT KILDA; SCOTLAND(WESTERN ISLES); UNITED KINGDOM;

ARTIODACTYLA; OVIS ARIES;

EID: 0032729150     PISSN: 00218790     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1365-2656.1999.00366.x     Document Type: Article

References (58)

1. Albon, S.D., Clutton-Brock, T.H. & Guinness, F.E. (1987) Early development and population dynamics in red deer. II. Density-independent effects and cohort variation. Journal of Animal Ecology, 56, 69-81.
2. Bancroft, D.R. (1993) Genetic variation and fitness in Soay sheep. PhD Thesis, University of Cambridge.
3. Bancroft, D.R., Pemberton, J.M., Albon, S.D., Robertson, A., MacColl, A.D.C., Smith, J.A., Stevenson, I.R. & Clutton-Brock, T.H. (1995) Molecular genetic variation and individual survival during population crashes of an unmanaged ungulate population. Philosophical Transactions of the Royal Society of London B, 347, 263-273.
4. Benton, T.G., Grant, A. & Clutton-Brock, T.H. (1995) Does environmental stochasticity matter? Analysis of the red deer life-histories on Rum. Evolutionary Ecology, 9, 559-574.
5. Bowyer, R.T., Leslie, D.M. & Rachlow, J.L. (in press) Dall's and Stone's sheep. Ecology and Management of Large Mammals in North America (eds P.R. Krausman & S. Demarair) Prentice Hall, Columbus, Ohio.
6. Calder, W.A. (1984) Size, Function and Life History. Harvard University Press, Cambridge, Massachusetts.
7. Catchpole, E.A., Freeman, S.N., Morgan, B.J.T. & Harris, M.P. (1998) Integrated recovery/recapture data analysis. Biometrics, 54, 33-46.
8. Catchpole, E.A., Morgan, B.J.T., Albon, S.D. & Coulson, T.N. (in press, a) Methodology for analysing individual case-history data. Biometrics.
9. Catchpole, E.A., Morgan, B.J.T., Coulson, T.N., Freeman, S.N. & Albon, S.D. (in press, b) Factors influencing Soay sheep survival. Applied Statistics.
10. Clutton-Brock, T.H., Illius, A.W., Wilson, K., Grenfell, B.T., MacColl, A.D. & Albon, S.D. (1997) Stability and instability in ungulate populations: an empirical analysis. American Naturalist, 149, 195-219.
11. Clutton-Brock, T.H., Major, M., Albon, S.D. & Guinness, F.E. (1987) Early development and population dynamics in red deer. I. Density-dependent effects on juvenile survival. Journal of Animal Ecology. 56, 53-67.
12. Clutton-Brock, T.H., Price, O.F., Albon, S.D. & Jewell, P.A. (1991) Persistent instability and population regulation in Soay sheep. Journal of Animal Ecology, 60, 593-608.
13. Clutton-Brock, T.H., Price, O.F., Albon, S.D. & Jewell, P.A. (1992) Early development and population fluctuations in Soay sheep. Journal of Animal Ecology, 61, 381-396.
14. Clutton-Brock, T.H., Stevenson, I.R., Marrow, P., MacColl, A.D., Houston, A.I. & McNamara, J.M. (1996) Population fluctuations, reproductive costs and life-history tactics in female Soay sheep. Journal of Animal Ecology, 65, 675-689.
15. Cox, D.R. & Snell, E.J. (1989) Analysis of Binary Data. Chapman & Hall, London.
16. Diggle, P.J. (1990) Time Series - a biostatistical introduction. Chapman & Hall, London.
17. Diggle, P.J., Liang, K.-Y. & Zeger, S. (1994) Analysis of Longitudinal Data. Clarendon Press, Oxford.
18. Festa-Bianchet, M., Jorgenson, J.T., Bérubé, C.H., Portier, C. & Wishart, W.D. (1997) Body mass and survival of bighorn sheep. Canadian Journal of Zoology, 75, 1372-1379.
19. Forchhammer, M.C., Post, E. & Stenseth, N.C. (1998a) Breeding phenology and climate. Nature, 391, 29-30.
20. Forchhammer, M.C., Stenseth, N.C., Post, E. & Langvatn, R. (1998b) Population dynamics of Norwegian red deer: density dependence and climatic variation. Proceedings of the Roval Society of London, B, 265, 341-350.
21. Fowler, C.W. (1987) A review of density dependence in populations of large mammals. Current Mammalogy (ed. H.H. Genoways), pp. 401-41. Plenum Press, New York.
22. Fromentin, J.-M. & Planque, B. (1996) North Atlantic Oscillation and year-to-year plankton fluctuations. Marine Ecology Progress Series, 134, 111-118.
23. Gaillard, J.-M., Delorme, D., Boutin, J.-M., van Laere, G., Boisaubert, B. & Pradel, R. (1993) Roe deer survival patterns: a comparative analysis of contrasting populations. Journal of Animal Ecology, 62, 778-791.
24. Gaillard, J.-M., Festa-Bianchet, M. & Yoccoz, N.G. (1998) Population dynamics of large herbivores: variable recruitment with constant adult survival. Trends in Ecology and Evolution, 13, 58-63.
25. Genstat, 5 Committee. (1993) Genstat 5. Release 3 Reference Manual. Clarendon Press, Oxford.
26. Glasbey, C.A. (1988) Examples of regression with serially correlated errors. Statistician, 37, 277-291.
27. Grant, B.R. & Grant, P.R. (1989) Natural selection in a population of Darwin's finches. American Naturalist, 133, 377-393.
28. Grenfell, B.T., Price, O.F., Albon, S.D. & Clutton-Brock, T.H. (1992) Over-compensation and population cycles in an ungulate. Nature, 355, 283-286.
29. Grenfell, B.T., Wilson, K., Finkenstädt, B.F., Coulson, T.N., Murray, S., Albon, S.D., Pemberton, J.M., Clutton-Brock, T.H. & Crawley, M.J. (1998) Noise and determinism in synchronised sheep dynamics. Nature, 394, 674-677.
30. Grubb, P. (1974) Population dynamics of the Soay sheep. Island Survivors. The ecology of the Soay sheep of St. Kilda (eds P.A. Jewell, C. Milner & J.M. Boyd), pp. 242-72. The Athlone Press, University of London. London.
31. Gulland, F.M.D. (1992) The role of nematode parasites in Soay sheep (Ovis aries L.) mortality during a population crash. Parasitology, 105, 493-503.
32. Gulland, F.M.D., Albon, S.D., Pemberton, J.M., Moorcroft, P.R. & Clutton-Brock, T.H. (1993) Parasite-associated polymorphism in a cyclic ungulate population. Proceedings of the Royal Society of London, B. 254, 7-13.
33. Gulland, F.M.D. & Fox, M. (1992) Epidemiology of nematode infections of Soay sheep (Ovis aries L.) mortality during a population crash. Parasitology, 105, 481-492.
34. Hurrell, J.W. (1995) Decadal trends in the North Atlantic Oscillation: regional temperatures and precipitation. Science, 269, 676-679.
35. Illius, A.W., Albon, S.D., Pemberton, J.M., Gordon, I.J. & Clutton-Brock, T.H. (1995) Selection for foraging efficiency during a population crash in Soay sheep. Journal of Animal Ecology, 64, 481-492.
36. Jewell, P.A., Milner, C. & Boyd, J.M. (1974) Island Survivors. The ecology of the Soay sheep of St. Kilda. The Athlone Press, University of London, London.
37. Jorgenson, J.T., Festa-Bianchet, M., Gaillard, J-M. & Wishart, W.D. (1997) Effects of age, sex, disease, and density on survival of bighorn sheep. Ecology, 78, 1019-1032.
38. Lebreton, J.-D., Pradel, R. & Clobert, J. (1993) The statistical analysis of survival in animal populations. Trends in Ecology and Evolution, 3, 91-95.
39. Leirs, H., Stenseth, N.C., Nichols, J.D., Hines, J.E., Verhagen, R. & Verheyen, W. (1997) Stochastic seasonality and nonlinear density-dependent factors regulate population size in an African rodent. Nature, 389, 176-180.
40. Lindstedt, S.L. & Boyce, M.S. (1985) Seasonality, fasting endurance and body size in mammals. American Naturalist, 125, 873-878.
41. McCullagh, P. & Neider, J.A. (1989) Generalized Linear Models. Chapman & Hall, London.
42. Milner, J.M., Albon, S.D., Illius, A.W., Pemberton, J.M. & Clutton-Brock, T.H. (1999) Repeated selection of morphometric traits in the Soay sheep on St. Kilda. Journal of Animal Ecology, 68, 472-488.
43. Moorcroft, P.R., Albon, S.D., Pemberton, J.M., Stevenson, LR. & Clutton-Brock, T.H. (1996) Density-dependent selection in a fluctuating ungulate population. Proceedings of the Royal Society of London B, 263, 31-38.
44. Owen-Smith, N. (1990) Demography of a large herbivore, the greater kudu Tragelaphus strepsiceros, in relation to rainfall. Journal of Animal Ecology, 59, 893-913.
45. Peters, R.H. (1983) The Ecological Implications of Body Size. Cambridge University Press, Cambridge.
46. Portier, C., Festa-Bianchet, M., Gaillard, J.-M., Jorgenson, J.T. & Yoccoz, N.G. (1998) Effects of density and weather on survival of bighorn sheep lambs (Ovis canadensis). Journal of Zoology, London, 245, 271-278.
47. Post, E. & Stenseth, N.C. (1998) Large-scale climatic fluctuation and population dynamics of moose and white-tailed deer. Journal of Animal Ecology, 67, 537-543.
48. Post, E., Stenseth, N.C., Langvatn, R. & Fromentin, J.-M. (1997) Global climate change and phenotypic variation among red deer cohorts. Proceedings of the Royal Society of London B. 264, 1317-1324.
49. Rose, K.E., Clutton-Brock. T.H. & Guinness, F.E. (1998) Cohort variation in male survival and lifetime breeding success in red deer. Journal of Animal Ecology, 67, 979-986.
50. Sæther, B.-E. (1997) Environmental stochasticity and population dynamics of large herbivores: a search for mechanisms. Trends in Ecology and Evolution, 12, 143-149.
51. Schall, R. (1991) Estimation in generalized linear models with random effects. Biometrika, 78, 719-727.
52. Sedinger, J.S., Flint, P.L. & Lindberg, M.S. (1995) Environmental influence on life-history traits: growth, survival, and fecundity in black brant (Branta bernicla). Ecology, 76, 2404-2414.
53. Sinclair, A.R.E. (1977) The African Buffalo. University of Chicago Press, Chicago.
54. Sinclair, A.R.E. (1989) Population regulation in animals. Ecological Concepts (ed. J.M. Cherrett), pp. 197-241. Blackwell Scientific Publications, Oxford.
55. Stevenson, I.R. (1994) Male-biased mortality in Soay sheep. PhD Thesis, University of Cambridge.
56. Stevenson, I.R. & Bancroft, D.R. (1995) Fluctuating tradeoffs favour precocial maturity in male Soay sheep. Proceedings of the Royal Society of London B. 262, 267-75.
57. Welham, S.J. (1995) Procedure GLMM. Genstat 5, Procedure Library Release 3[3] (eds R.W. Payne & G.M. Arnold), pp. 201-205. Lawes Agricultural Trust, Oxford.
58. Wilby, R.L., O'Hare, G. & Barnsley, N. (1997) The North Atlantic oscillation and British Isles climate variability. 1865-1996. Weather, 52, 266-276.