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Volumn 80, Issue 3, 1999, Pages 957-975

Demography of the Yellowstone grizzly bears

Author keywords

Akaike information criterion; Behavior; Conditioning to humans; Conservation; Demography; Generalized Leslie matrix; Grizzly bear; Maximum likelihood; Radiotelemetry; Source sink; Ursus arctos; Whitebark pine

Indexed keywords

CONSERVATION PLANNING; CONSERVATION STATUS; DEMOGRAPHY; ENVIRONMENTAL FACTOR; POPULATION SIZE;

EID: 0032895662     PISSN: 00129658     EISSN: None     Source Type: Journal    
DOI: 10.1890/0012-9658(1999)080[0957:DOTYGB]2.0.CO;2     Document Type: Article
Times cited : (63)

References (92)
  • 1
    • 0000501656 scopus 로고
    • Information theory and an extension of the maximum principle
    • B. N. Pertran and F. Csaki, editors. Akademiai Kiadi, Budapest, Hungary
    • Akaike, H. 1973. Information theory and an extension of the maximum principle. Pages 267-281 in B. N. Pertran and F. Csaki, editors. Second International Symposium on Information Theory. Akademiai Kiadi, Budapest, Hungary.
    • (1973) Second International Symposium on Information Theory , pp. 267-281
    • Akaike, H.1
  • 2
    • 51249190629 scopus 로고
    • Parameter estimates from mark-recapture experiments on two populations subject to migration and death
    • Arnson, A. N. 1972. Parameter estimates from mark-recapture experiments on two populations subject to migration and death. Researches on Population Ecology 13:97-113.
    • (1972) Researches on Population Ecology , vol.13 , pp. 97-113
    • Arnson, A.N.1
  • 3
    • 0020381681 scopus 로고
    • Estimating survivorship when the subjects are visited periodically
    • Bart, J., and D. S. Robson. 1982. Estimating survivorship when the subjects are visited periodically. Ecology 63: 1078-1090.
    • (1982) Ecology , vol.63 , pp. 1078-1090
    • Bart, J.1    Robson, D.S.2
  • 4
    • 0344459592 scopus 로고
    • Field techniques used in the study of grizzly bears
    • U.S. National Park Service
    • Blanchard, B. M. 1985. Field techniques used in the study of grizzly bears. U.S. National Park Service. Interagency Grizzly Bear Study Team Report.
    • (1985) Interagency Grizzly Bear Study Team Report
    • Blanchard, B.M.1
  • 7
    • 0029506805 scopus 로고
    • Biological consequences of relocating grizzly bears in the yellowstone ecosystem
    • Blanchard, B. M., and R. R. Knight. 1995. Biological consequences of relocating grizzly bears in the Yellowstone ecosystem. Journal of Wildlife Management 59:560-565.
    • (1995) Journal of Wildlife Management , vol.59 , pp. 560-565
    • Blanchard, B.M.1    Knight, R.R.2
  • 8
    • 0344459589 scopus 로고
    • Population viability analysis for grizzly bears (Ursus arctos horribilis): A critical review
    • Boyce, M. 1995. Population viability analysis for grizzly bears (Ursus arctos horribilis): a critical review. A report to the Interagency Grizzly Bear Committee.
    • (1995) A Report to the Interagency Grizzly Bear Committee
    • Boyce, M.1
  • 9
    • 0000740204 scopus 로고
    • Data-based selection of an appropriate biological model: The key to modern data analysis
    • D. R. McCullough and R. H. Barrett, editors. Elsevier, Amsterdam, The Netherlands
    • Burnham, K., and D. R. Anderson. 1992. Data-based selection of an appropriate biological model: the key to modern data analysis. Pages 16-20 in D. R. McCullough and R. H. Barrett, editors. Wildlife 2001: populations. Elsevier, Amsterdam, The Netherlands.
    • (1992) Wildlife 2001: Populations , pp. 16-20
    • Burnham, K.1    Anderson, D.R.2
  • 10
    • 0028991558 scopus 로고
    • Model selection strategy in the analysis of capture-recapture data
    • Burnham, K. P., G. C. White, and D. R. Anderson. 1995. Model selection strategy in the analysis of capture-recapture data. Biometrics 51:888-898.
    • (1995) Biometrics , vol.51 , pp. 888-898
    • Burnham, K.P.1    White, G.C.2    Anderson, D.R.3
  • 17
    • 0012949051 scopus 로고
    • Montana Forest and Conservation Experiment Station, Bulletin 40. School of Forestry, University of Montana, Missoula, Montana, USA
    • Craighead, J. J., J. Varney, and F. C. Craighead. 1974. A population analysis of the Yellowstone grizzly bears. Montana Forest and Conservation Experiment Station, Bulletin 40. School of Forestry, University of Montana, Missoula, Montana, USA.
    • (1974) A Population Analysis of the Yellowstone Grizzly Bears
    • Craighead, J.J.1    Varney, J.2    Craighead, F.C.3
  • 18
    • 0343960408 scopus 로고
    • Bear-people conflict management in Denali National Park, Alaska
    • M. Bromley, editor. Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada
    • Dalle-Molle, J. L., and J. C. Van Horn. 1989. Bear-people conflict management in Denali National Park, Alaska. Pages 121-128 in M. Bromley, editor. Bear-People Conflicts: Proceedings of a Symposium on Management Strategies. Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada.
    • (1989) Bear-people Conflicts: Proceedings of a Symposium on Management Strategies , pp. 121-128
    • Dalle-Molle, J.L.1    Van Horn, J.C.2
  • 19
    • 0026015808 scopus 로고
    • Estimation of growth and extinction parameters for endangered species
    • Dennis, B., P. L. Monholland, and J. M. Scott. 1991. Estimation of growth and extinction parameters for endangered species. Ecological Monographs 61:115-143.
    • (1991) Ecological Monographs , vol.61 , pp. 115-143
    • Dennis, B.1    Monholland, P.L.2    Scott, J.M.3
  • 20
    • 0007179848 scopus 로고
    • Population trend estimates from reproductive and survival data
    • R. R. Knight and B. M. Blanchard, editors. National Biological Service, Bozeman, Montana, USA
    • Eberhardt, L. L. 1995. Population trend estimates from reproductive and survival data. Pages 13-19 in R. R. Knight and B. M. Blanchard, editors. Yellowstone grizzly bear investigations: annual report of the Interagency Study Team 1994. National Biological Service, Bozeman, Montana, USA.
    • (1995) Yellowstone Grizzly Bear Investigations: Annual Report of the Interagency Study Team 1994 , pp. 13-19
    • Eberhardt, L.L.1
  • 21
    • 0028178429 scopus 로고
    • Population trend of the yellowstone grizzly bear as estimated from reproductive and survival rates
    • Eberhardt, L. L., B. M. Blanchard, and R. R. Knight. 1994. Population trend of the Yellowstone grizzly bear as estimated from reproductive and survival rates. Canadian Journal of Zoology 72:360-363.
    • (1994) Canadian Journal of Zoology , vol.72 , pp. 360-363
    • Eberhardt, L.L.1    Blanchard, B.M.2    Knight, R.R.3
  • 23
    • 0028179780 scopus 로고
    • Predicting extinction times from environmental stochasticity and carrying capacity
    • Foley, P. 1994. Predicting extinction times from environmental stochasticity and carrying capacity. Conservation Biology 8:124-137.
    • (1994) Conservation Biology , vol.8 , pp. 124-137
    • Foley, P.1
  • 25
    • 0002199901 scopus 로고
    • Behavioral plasticity and bear-human conflicts
    • M. Bromley, editor. Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada
    • Gilbert, B. K. 1989. Behavioral plasticity and bear-human conflicts. Pages 1-8 in M. Bromley, editor. Bear-People Conflicts: Proceedings of a Symposium on Management Strategies. Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada.
    • (1989) Bear-people Conflicts: Proceedings of a Symposium on Management Strategies , pp. 1-8
    • Gilbert, B.K.1
  • 26
    • 0014643769 scopus 로고
    • The analysis of population growth when the birth and death rates depend on several factors
    • Goodman, L. A. 1969. The analysis of population growth when the birth and death rates depend on several factors. Biometrics 25:659-681.
    • (1969) Biometrics , vol.25 , pp. 659-681
    • Goodman, L.A.1
  • 28
    • 0022189935 scopus 로고
    • Evaluation of survival and cause-specific mortality rates using telemetry data
    • Heisey, D. M., and T. K. Fuller. 1985. Evaluation of survival and cause-specific mortality rates using telemetry data. Journal of Wildlife Management 49:668-674.
    • (1985) Journal of Wildlife Management , vol.49 , pp. 668-674
    • Heisey, D.M.1    Fuller, T.K.2
  • 29
    • 0345144267 scopus 로고
    • Bear attacks: Their causes and avoidance
    • New York, New York, USA
    • Herrero, S. 1985. Bear attacks: their causes and avoidance. Nick Lyons Books, New York, New York, USA.
    • (1985) Nick Lyons Books
    • Herrero, S.1
  • 30
    • 0026046726 scopus 로고
    • Estimates of movement and site fidelity using mark-resight data of wintering Canada Geese
    • Hestbeck, J., J. D. Nichols, and R. A. Malecki. 1991. Estimates of movement and site fidelity using mark-resight data of wintering Canada Geese. Ecology 72:523-533.
    • (1991) Ecology , vol.72 , pp. 523-533
    • Hestbeck, J.1    Nichols, J.D.2    Malecki, R.A.3
  • 31
    • 0029659944 scopus 로고    scopus 로고
    • Estimating population growth of grizzly bears from the Flathead River drainage using computer simulations of reproduction and survival rates
    • Hovey, F. W., and B. N. McLellan. 1996. Estimating population growth of grizzly bears from the Flathead River drainage using computer simulations of reproduction and survival rates. Canadian Journal of Zoology 74:1409-1416.
    • (1996) Canadian Journal of Zoology , vol.74 , pp. 1409-1416
    • Hovey, F.W.1    McLellan, B.N.2
  • 32
    • 0002050682 scopus 로고
    • Implications of grizzly bear human-conditioning to hikers
    • Jope, K. L. 1985. Implications of grizzly bear human-conditioning to hikers. Wildlife Society Bulletin 13:32-37.
    • (1985) Wildlife Society Bulletin , vol.13 , pp. 32-37
    • Jope, K.L.1
  • 34
    • 0025658789 scopus 로고
    • Modelling stand dynamics in whitebark pine (Pinus albicaulis) forests
    • Keane, R. E., S. F. Arno, J. K. Brown, and D. F. Tomback. 1990. Modelling stand dynamics in whitebark pine (Pinus albicaulis) forests. Ecological Modelling 51:73-95.
    • (1990) Ecological Modelling , vol.51 , pp. 73-95
    • Keane, R.E.1    Arno, S.F.2    Brown, J.K.3    Tomback, D.F.4
  • 35
    • 0001875891 scopus 로고
    • Whitebark pine: Ecosystem in peril
    • E. T. LaRoe, G. S. Farris, C. E. Puckett, P. D. Doran, and M. J. Mac, editors. National Biological Service, Washington, D.C., USA
    • Kendall, K. C. 1995. Whitebark pine: ecosystem in peril. Pages 228-230 in E. T. LaRoe, G. S. Farris, C. E. Puckett, P. D. Doran, and M. J. Mac, editors. Our living resources. U.S.D.I. (U.S. Department of Interior), National Biological Service, Washington, D.C., USA.
    • (1995) Our Living Resources. U.S.D.I. (U.S. Department of Interior) , pp. 228-230
    • Kendall, K.C.1
  • 42
    • 0024251385 scopus 로고
    • Mortality patterns and population sinks for yellowstone grizzly bears, 1973-1985
    • Knight, R. R., B. M. Blanchard, and L. L. Eberhardt. 1988a. Mortality patterns and population sinks for Yellowstone grizzly bears, 1973-1985. Wildlife Society Bulletin 16: 121-125.
    • (1988) Wildlife Society Bulletin , vol.16 , pp. 121-125
    • Knight, R.R.1    Blanchard, B.M.2    Eberhardt, L.L.3
  • 43
    • 0000162610 scopus 로고
    • Appraising status of the yellowstone grizzly bear population by counting cubs-of-the-year
    • Knight, R. R., B. M. Blanchard, and L. L. Eberhardt. 1995. Appraising status of the Yellowstone grizzly bear population by counting cubs-of-the-year. Wildlife Society Bulletin 23:245-248.
    • (1995) Wildlife Society Bulletin , vol.23 , pp. 245-248
    • Knight, R.R.1    Blanchard, B.M.2    Eberhardt, L.L.3
  • 55
    • 0001575978 scopus 로고
    • Projected future abundance of the yellowstone grizzly bear
    • Knight, R. R., and L. L. Eberhardt. 1984. Projected future abundance of the Yellowstone grizzly bear. Journal Wildlife Management 48:1434-1438.
    • (1984) Journal Wildlife Management , vol.48 , pp. 1434-1438
    • Knight, R.R.1    Eberhardt, L.L.2
  • 56
    • 0000916216 scopus 로고
    • Population dynamics of yellowstone grizzly bears
    • Knight, R. R., and L. L. Eberhardt. 1985. Population dynamics of Yellowstone grizzly bears. Ecology 66:323-334.
    • (1985) Ecology , vol.66 , pp. 323-334
    • Knight, R.R.1    Eberhardt, L.L.2
  • 58
    • 0026490966 scopus 로고
    • Modeling survival and testing biological hypotheses using marked animals: A unified approach with case studies
    • Lebreton, J.-D., K. P. Burnham, J. Clobert, and D. R. Anderson. 1992. Modeling survival and testing biological hypotheses using marked animals: a unified approach with case studies. Ecological Monographs 62:67-118.
    • (1992) Ecological Monographs , vol.62 , pp. 67-118
    • Lebreton, J.-D.1    Burnham, K.P.2    Clobert, J.3    Anderson, D.R.4
  • 60
    • 0030618687 scopus 로고    scopus 로고
    • Sustainable grizzly bear mortality calculated from counts of females with cubs-of-the-year: An evaluation
    • _. 1997a. Sustainable grizzly bear mortality calculated from counts of females with cubs-of-the-year: an evaluation. Biological Conservation 81:103-111.
    • (1997) Biological Conservation , vol.81 , pp. 103-111
  • 61
    • 0030619075 scopus 로고    scopus 로고
    • Use of lodgepole pine cover types by yellowstone grizzly bears
    • _. 1997b. Use of lodgepole pine cover types by Yellowstone grizzly bears. Journal of Wildlife Management 61:480-496.
    • (1997) Journal of Wildlife Management , vol.61 , pp. 480-496
  • 62
    • 0030619929 scopus 로고    scopus 로고
    • Use of ungulates by yellowstone grizzly bears
    • _. 1997c. Use of ungulates by Yellowstone grizzly bears. Biological Conservation 81:161-177.
    • (1997) Biological Conservation , vol.81 , pp. 161-177
  • 63
    • 0004130569 scopus 로고    scopus 로고
    • Changes in mortality of yellowstone's grizzly bears
    • _. 1998. Changes in mortality of Yellowstone's grizzly bears. Ursus 10:129-138.
    • (1998) Ursus , vol.10 , pp. 129-138
  • 65
    • 0027067413 scopus 로고
    • Yellowstone grizzly bear mortality, human-habituation, and whitebark pine seed crops
    • Mattson, D. J., B. M. Blanchard, and R. R. Knight. 1992. Yellowstone grizzly bear mortality, human-habituation, and whitebark pine seed crops. Journal of Wildlife Management 56:432-442.
    • (1992) Journal of Wildlife Management , vol.56 , pp. 432-442
    • Mattson, D.J.1    Blanchard, B.M.2    Knight, R.R.3
  • 66
    • 0002586196 scopus 로고
    • The yellowstone grizzly bear recovery program: Uncertain information, uncertain policy
    • T. W. Clark, R. P. Reading, and A. L. Clark, editors. Island Press, Washington, D.C., USA
    • Mattson, D. J., and J. J. Craighead. 1994. The Yellowstone grizzly bear recovery program: uncertain information, uncertain policy. Pages 101-129 in T. W. Clark, R. P. Reading, and A. L. Clark, editors. Endangered species recovery: finding the lessons, improving the process. Island Press, Washington, D.C., USA.
    • (1994) Endangered Species Recovery: Finding the Lessons, Improving the Process , pp. 101-129
    • Mattson, D.J.1    Craighead, J.J.2
  • 67
    • 0026330389 scopus 로고
    • Bear feeding activity at alpine insect aggregations in the yellowstone ecosystem
    • Mattson, D. J., C. M. Gillin, S. A. Benson, and R. R. Knight. 1991a. Bear feeding activity at alpine insect aggregations in the Yellowstone ecosystem. Canadian Journal of Zoology 69:2430-2435.
    • (1991) Canadian Journal of Zoology , vol.69 , pp. 2430-2435
    • Mattson, D.J.1    Gillin, C.M.2    Benson, S.A.3    Knight, R.R.4
  • 71
    • 0000237061 scopus 로고
    • Grizzly bears
    • E. T. LaRoe, G. S. Farris, C. E. Puckett, P. D. Doran, and M. J. Mac, editors. U.S.D.I. National Biological Service, Washington, D.C., USA
    • Mattson, D. J., R. G. Wright, K. C. Kendall, and C. J. Martinka. 1995. Grizzly bears. Pages 103-105 in E. T. LaRoe, G. S. Farris, C. E. Puckett, P. D. Doran, and M. J. Mac, editors. Our living resources. U.S.D.I. National Biological Service, Washington, D.C., USA.
    • (1995) Our Living Resources , pp. 103-105
    • Mattson, D.J.1    Wright, R.G.2    Kendall, K.C.3    Martinka, C.J.4
  • 72
    • 0002555102 scopus 로고
    • Population dynamics of the yellowstone grizzly bear
    • C. W. Fowler and T. D. Smith, editors. John Wiley, New York, New York, USA
    • McCullough, D. R. 1981. Population dynamics of the Yellowstone grizzly bear. Pages 173-196 in C. W. Fowler and T. D. Smith, editors. Dynamics of large-mammal populations. John Wiley, New York, New York, USA.
    • (1981) Dynamics of Large-mammal Populations , pp. 173-196
    • McCullough, D.R.1
  • 73
    • 0024221530 scopus 로고
    • Grizzly bears and resource-extraction industries: Effects of roads on behavior, habitat use and demography
    • McLellan, B. N., and D. M. Shackleton. 1988. Grizzly bears and resource-extraction industries: effects of roads on behavior, habitat use and demography. Journal of Applied Ecology 25:451-460.
    • (1988) Journal of Applied Ecology , vol.25 , pp. 451-460
    • McLellan, B.N.1    Shackleton, D.M.2
  • 74
    • 0024937546 scopus 로고
    • Immediate reactions of grizzly bears to human activities
    • McLellan, B. N., and D. M. Shackleton. 1989. Immediate reactions of grizzly bears to human activities. Wildlife Society Bulletin 17:269-274.
    • (1989) Wildlife Society Bulletin , vol.17 , pp. 269-274
    • McLellan, B.N.1    Shackleton, D.M.2
  • 75
    • 0007300205 scopus 로고
    • The consequences of protecting problem grizzly bears
    • Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada
    • Meagher, M., and S. Fowler. 1989. The consequences of protecting problem grizzly bears. Pages 141-144 in Bear-People Conflicts: Proceedings of a Symposium on Management Strategies. Northwest Territories Department of Renewable Resources, Yellowknife, Northwest Territories, Canada.
    • (1989) Bear-people Conflicts: Proceedings of a Symposium on Management Strategies , pp. 141-144
    • Meagher, M.1    Fowler, S.2
  • 76
    • 0344891386 scopus 로고
    • Restoration of natural populations of grizzly and black bears in Yellowstone National Park
    • Meagher, M., and J. R. Phillips. 1983. Restoration of natural populations of grizzly and black bears in Yellowstone National Park. International Conference on Bear Research and Management 5:152-158.
    • (1983) International Conference on Bear Research and Management , vol.5 , pp. 152-158
    • Meagher, M.1    Phillips, J.R.2
  • 77
    • 0000238336 scopus 로고
    • A simplex method for function minimization
    • Nelder, J. A., and R. Mead. 1965. A simplex method for function minimization. Computer Journal 7:308-313.
    • (1965) Computer Journal , vol.7 , pp. 308-313
    • Nelder, J.A.1    Mead, R.2
  • 78
    • 0022857411 scopus 로고
    • Coordinating livestock and timber management with the grizzly bear in situation 1 habitat. Targhee national forest
    • G. P. Contreras and K. E. Evans, editors. U.S.D.A. Forest Service General Technical Report INT-207
    • Orme, M. L., and R. G. Williams. 1986. Coordinating livestock and timber management with the grizzly bear in Situation 1 habitat. Targhee National Forest. Pages 195-203 in G. P. Contreras and K. E. Evans, editors. Proceedings, Grizzly Bear Habitat Symposium. U.S.D.A. Forest Service General Technical Report INT-207.
    • (1986) Proceedings, Grizzly Bear Habitat Symposium , pp. 195-203
    • Orme, M.L.1    Williams, R.G.2
  • 79
    • 0030613985 scopus 로고    scopus 로고
    • A systematic approach to some aspects of conservation biology
    • Pease, C. M., and N. L. Fowler. 1997. A systematic approach to some aspects of conservation biology. Ecology 78:1321-1329.
    • (1997) Ecology , vol.78 , pp. 1321-1329
    • Pease, C.M.1    Fowler, N.L.2
  • 80
    • 0024886743 scopus 로고
    • Estimation and analysis of survival distributions for radio-tagged animals
    • Pollock, K. H., S. R. Winterstein, and M. J. Conroy. 1989. Estimation and analysis of survival distributions for radio-tagged animals. Biometrics 45:99-109.
    • (1989) Biometrics , vol.45 , pp. 99-109
    • Pollock, K.H.1    Winterstein, S.R.2    Conroy, M.J.3
  • 82
    • 0026293328 scopus 로고
    • Implications of global climate change for biogeographic patterns in the greater yellowstone ecosystem
    • Romme, W. H., and M. G. Turner. 1991. Implications of global climate change for biogeographic patterns in the greater Yellowstone ecosystem. Conservation Biology 5: 373-386.
    • (1991) Conservation Biology , vol.5 , pp. 373-386
    • Romme, W.H.1    Turner, M.G.2
  • 83
    • 85038191866 scopus 로고
    • The yellowstone grizzly bear: A review of past and present population estimates
    • R. R. Knight, B. M. Blanchard, K. C. Kendall, and L. E. Oldenburg, editors. U.S.D.I. National Park Service, Bozeman, Montana, USA
    • Roop, L. J. 1980. The Yellowstone grizzly bear: a review of past and present population estimates. Pages 61-75 in R. R. Knight, B. M. Blanchard, K. C. Kendall, and L. E. Oldenburg, editors. Yellowstone grizzly bear investigations: annual report of the interagency study team 1978-1979. U.S.D.I. National Park Service, Bozeman, Montana, USA.
    • (1980) Yellowstone Grizzly Bear Investigations: Annual Report of the Interagency Study Team 1978-1979 , pp. 61-75
    • Roop, L.J.1
  • 89
    • 0022173201 scopus 로고
    • New estimates of minimum viable population size for grizzly bears of the yellowstone ecosystem
    • Suchy, W., L. L. McDonald, M. D. Strickland, and S. H. Anderson. 1985. New estimates of minimum viable population size for grizzly bears of the Yellowstone ecosystem. Wildlife Society Bulletin 13:223-228.
    • (1985) Wildlife Society Bulletin , vol.13 , pp. 223-228
    • Suchy, W.1    McDonald, L.L.2    Strickland, M.D.3    Anderson, S.H.4
  • 91
    • 0003946037 scopus 로고
    • U.S. Fish and Wildlife Service, Missoula, Montana, USA
    • USFWS (U.S. Fish and Wildlife Service). 1993. Grizzly Bear Recovery Plan. U.S. Fish and Wildlife Service, Missoula, Montana, USA.
    • (1993) Grizzly Bear Recovery Plan
  • 92
    • 0021036084 scopus 로고
    • Numerical estimation of survival rates from band-recovery and biotelemetry data
    • White, G. C. 1983. Numerical estimation of survival rates from band-recovery and biotelemetry data. Journal of Wildlife Management 47:716-728.
    • (1983) Journal of Wildlife Management , vol.47 , pp. 716-728
    • White, G.C.1


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