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Volumn 48, Issue 6, 1994, Pages 1407-1416

Female pied flycatchers prefer brightly coloured males

Author keywords

[No Author keywords available]

Indexed keywords

MATE CHOICE; PIED FLYCATCHER; PLUMAGE COLOUR; SEXUAL SELECTION;

EID: 0028165304     PISSN: 00033472     EISSN: None     Source Type: Journal    
DOI: 10.1006/anbe.1994.1376     Document Type: Article
Times cited : (96)

References (62)
  • 1
    • 0001213463 scopus 로고
    • The search cost in mate choice of the pied flycatcher
    • Alatalo, R. V., Carlsson, A. & Lundberg, A. 1988. The search cost in mate choice of the pied flycatcher. Anim. Behav., 36, 289-291.
    • (1988) Anim. Behav. , vol.36 , pp. 289-291
    • Alatalo, R.V.1    Carlsson, A.2    Lundberg, A.3
  • 2
    • 0022833909 scopus 로고
    • Female pied flycatchers choose territory quality and not male characteristics
    • Alatalo, R. V., Glynn, C. & Lundberg, A. 1986. Female pied flycatchers choose territory quality and not male characteristics. Nature, Lond., 323, 152-153.
    • (1986) Nature, Lond. , vol.323 , pp. 152-153
    • Alatalo, R.V.1    Glynn, C.2    Lundberg, A.3
  • 3
    • 0001934548 scopus 로고
    • Why do pied flycatcher females mate with already mated males?
    • Alatalo, R. V., Lundberg, A. & Stahlbrandt, K. 1982. Why do pied flycatcher females mate with already mated males? Anim. Behav., 30, 585-593.
    • (1982) Anim. Behav. , vol.30 , pp. 585-593
    • Alatalo, R.V.1    Lundberg, A.2    Stahlbrandt, K.3
  • 4
    • 0025209486 scopus 로고
    • Can female preference explain sexual dichromatism in the pied flycatcher Ficedula hypoleuca?
    • Alatalo, R. V., Lundberg, A. & Sundberg, J, 1990a. Can female preference explain sexual dichromatism in the pied flycatcher Ficedula hypoleuca? Anim. Behav., 39, 244-252.
    • (1990) Anim. Behav. , vol.39 , pp. 244-252
    • Alatalo, R.V.1    Lundberg, A.2    Sundberg, J.3
  • 5
    • 0000688346 scopus 로고
    • Singing rate and female attraction in the pied flycatcher: An experiment
    • Alatalo, R. V., Glynn, C. & Lundberg, A. 1990b. Singing rate and female attraction in the pied flycatcher: an experiment. Anim. Behav., 39, 601-603.
    • (1990) Anim. Behav. , vol.39 , pp. 601-603
    • Alatalo, R.V.1    Glynn, C.2    Lundberg, A.3
  • 6
    • 0000023166 scopus 로고
    • Evolution of condition-dependent sex ornaments and mating preferences: Sexual selection based on viability differences
    • Andersson, M. 1986. Evolution of condition-dependent sex ornaments and mating preferences: sexual selection based on viability differences. Evolution, 40, 804-816.
    • (1986) Evolution , vol.40 , pp. 804-816
    • Andersson, M.1
  • 7
    • 34548435786 scopus 로고
    • Territorial defence and plumage colour in pied flycatchers, Ficedula hypo-leuca
    • Breiehagen, T. & Setre, G.-P. 1992. Territorial defence and plumage colour in pied flycatchers, Ficedula hypo-leuca. Anim. Behav., 44, 987-989.
    • (1992) Anim. Behav. , vol.44 , pp. 987-989
    • Breiehagen, T.1    Setre, G.-P.2
  • 8
    • 0039302580 scopus 로고
    • Influence of colour-banding on the conspecific preferences of zebra finches
    • Burley, N., Krantzberg, G. & Radman, P. 1982. Influence of colour-banding on the conspecific preferences of zebra finches. Anim. Behav., 30, 444-445.
    • (1982) Anim. Behav. , vol.30 , pp. 444-445
    • Burley, N.1    Krantzberg, G.2    Radman, P.3
  • 9
    • 0003126860 scopus 로고
    • The evolution of conspicuous and distinctive coloration for communication in birds
    • Butcher, G. S. & Rohwer, S. 1989. The evolution of conspicuous and distinctive coloration for communication in birds. Curr. Ornithol, 6, 51-108.
    • (1989) Curr. Ornithol , vol.6 , pp. 51-108
    • Butcher, G.S.1    Rohwer, S.2
  • 10
    • 0013618515 scopus 로고
    • Verhaltenstudien am Trauerschnapper. Z
    • Curio, E. 1959. Verhaltenstudien am Trauerschnapper. Z. Tierpsychol., 3, 1-118.
    • (1959) Tierpsychol. , vol.3 , pp. 1-118
    • Curio, E.1
  • 11
    • 0025603265 scopus 로고
    • Mate sampling behaviour of female pied flycatchers: Evidence for active mate choice
    • Dale, S., Amundsen, T., Lifjeld, J. T. & Slagsvold, T. 1990. Mate sampling behaviour of female pied flycatchers: evidence for active mate choice. Behav. Eeol Sociobiol, 27, 87-91.
    • (1990) Behav. Eeol Sociobiol , vol.27 , pp. 87-91
    • Dale, S.1    Amundsen, T.2    Lifjeld, J.T.3    Slagsvold, T.4
  • 12
    • 0027060268 scopus 로고
    • Competition for a mate restricts mate search of female pied flycatchers
    • Dale, S., Rinden, H. & Slagsvold, T. 1992. Competition for a mate restricts mate search of female pied flycatchers. Behav. Ecol. Sociobiol., 30, 165-176.
    • (1992) Behav. Ecol. Sociobiol. , vol.30 , pp. 165-176
    • Dale, S.1    Rinden, H.2    Slagsvold, T.3
  • 13
    • 0025207066 scopus 로고
    • Random settlement of female pied flycatchers, Ficedula hypoleuca: Significance of male territory size
    • Dale, S. & Slagsvold, T, 1990. Random settlement of female pied flycatchers, Ficedula hypoleuca: significance of male territory size. Anim. Behav., 39, 231-243.
    • (1990) Anim. Behav. , vol.39 , pp. 231-243
    • Dale, S.1    Slagsvold, T.2
  • 14
    • 0028180690 scopus 로고
    • Male pied flycatchers do not choose mates
    • Dale, S. & Slagsvold, T. 1994. Male pied flycatchers do not choose mates. Anim. Behav., 47, 1197-1205.
    • (1994) Anim. Behav. , vol.47 , pp. 1197-1205
    • Dale, S.1    Slagsvold, T.2
  • 16
    • 0002212898 scopus 로고
    • Ecological questions about territorial behaviour
    • (J. R. Krebs & N. B. Davies, Oxford: Blackwell Scientific Publications
    • Davies, N. B. 1978. Ecological questions about territorial behaviour. In: Behavioural Ecology. An Evolutionary Approach (Ed. by J. R. Krebs & N. B. Davies), pp. 317-350. Oxford: Blackwell Scientific Publications
    • (1978) Behavioural Ecology. an Evolutionary Approach , pp. 317-350
    • Davies, N.B.1
  • 17
    • 0000637073 scopus 로고
    • Uber das brutkleid mannlicher Trauer-fliegenfanger, Muscicapa hypoleuca
    • Drost, R. 1936. Uber das brutkleid mannlicher Trauer-fliegenfanger, Muscicapa hypoleuca. Vogelzug, 6, 179-186.
    • (1936) Vogelzug , vol.6 , pp. 179-186
    • Drost, R.1
  • 18
    • 0027437064 scopus 로고
    • Female choice for age-specific plumage in the orchard oriole: Implications for delayed plumage maturation
    • Enstrom, D. A. 1993. Female choice for age-specific plumage in the orchard oriole: implications for delayed plumage maturation. Anim. Behav., 45, 435-442.
    • (1993) Anim. Behav. , vol.45 , pp. 435-442
    • Enstrom, D.A.1
  • 19
    • 0003066948 scopus 로고
    • Variation in the song of pied flycatchers within and between breeding seasons
    • Espmark, Y. O. & Lampe, H. 1993. Variation in the song of pied flycatchers within and between breeding seasons. Bioacoustics, 5, 33-65.
    • (1993) Bioacoustics , vol.5 , pp. 33-65
    • Espmark, Y.O.1    Lampe, H.2
  • 20
    • 0026527057 scopus 로고
    • Anti-predator effect of conspicuous plumage in a male bird
    • Gotmark, F. 1992. Anti-predator effect of conspicuous plumage in a male bird, Anim. Behav., 44, 51-55.
    • (1992) Anim. Behav. , vol.44 , pp. 51-55
    • Gotmark, F.1
  • 21
    • 0000892998 scopus 로고
    • The study of mate choice
    • (P. Bateson, Cambridge: Cambridge University Press
    • Halliday, T. R. 1983. The study of mate choice. In: Mate Choice (Ed. by P. Bateson), pp. 3-32. Cambridge: Cambridge University Press.
    • (1983) Mate Choice , pp. 3-32
    • Halliday, T.R.1
  • 22
    • 0020336255 scopus 로고
    • Heritable true fitness and bright birds: A role for parasites?
    • Hamilton, W. D. & Zuk, M. 1982. Heritable true fitness and bright birds: a role for parasites? Science, 218, 384-387.
    • (1982) Science , vol.218 , pp. 384-387
    • Hamilton, W.D.1    Zuk, M.2
  • 23
    • 0002186031 scopus 로고
    • Sexual selection
    • (J. R. Krebs & N. B. Davies, Oxford: Blackwell Scientific Publications
    • Harvey, P. H. & Bradbury, J. W. 1991. Sexual selection. In: Behavioural Ecology. An Evolutionary Approach (Ed. by J. R. Krebs & N. B. Davies), pp. 203-233. Oxford: Blackwell Scientific Publications.
    • (1991) Behavioural Ecology. an Evolutionary Approach , pp. 203-233
    • Harvey, P.H.1    Bradbury, J.W.2
  • 24
    • 0024976831 scopus 로고
    • Amplifiers and the handicap principle in sexual selection: A different emphasis
    • Hasson, O. 1989. Amplifiers and the handicap principle in sexual selection: a different emphasis. Proc. R, Soc. Lond. Ser. B, 235, 383-406.
    • (1989) Proc. R, Soc. Lond. Ser. B , vol.235 , pp. 383-406
    • Hasson, O.1
  • 25
    • 0025593946 scopus 로고
    • Female house finches prefer colourful males: Sexual selection for a condition-dependent trait
    • Hill, G. E. 1990. Female house finches prefer colourful males: sexual selection for a condition-dependent trait. Anim. Behav., 40, 563-572.
    • (1990) Anim. Behav. , vol.40 , pp. 563-572
    • Hill, G.E.1
  • 26
    • 0025956944 scopus 로고
    • Plumage colour is a sexual selected indicator of male quality
    • Hill, G. E. 1991. Plumage colour is a sexual selected indicator of male quality. Nature, Lond., 350, 337-338.
    • (1991) Nature, Lond. , vol.350 , pp. 337-338
    • Hill, G.E.1
  • 27
    • 0027451188 scopus 로고
    • Plumage colour and male-male interactions in the pied flycatcher
    • Huhta, E. & Alatalo, R. V. 1993. Plumage colour and male-male interactions in the pied flycatcher. Anim. Behav., 45, 511-518.
    • (1993) Anim. Behav. , vol.45 , pp. 511-518
    • Huhta, E.1    Alatalo, R.V.2
  • 28
    • 0000813686 scopus 로고
    • Evolution of variation in male secondary sexual characteristics: A test of eight hypotheses applied to pied flycatchers
    • Jarvi, T., Roskaft, E., Bakken, M. & Zumsteg, B. 1987. Evolution of variation in male secondary sexual characteristics: a test of eight hypotheses applied to pied flycatchers. Behav. Ecol. Sociobio I., 20, 161-169.
    • (1987) Behav. Ecol. Sociobio I. , vol.20 , pp. 161-169
    • Jarvi, T.1    Roskaft, E.2    Bakken, M.3    Zumsteg, B.4
  • 29
    • 0027503795 scopus 로고
    • Preference of female American goldfinches [Carduelis tristis) for natural and artificial male traits
    • Johnson, K., Dalton, R. & Burley, N. 1993. Preference of female American goldfinches [Carduelis tristis) for natural and artificial male traits. Behav. Ecol, 4, 138-143.
    • (1993) Behav. Ecol , vol.4 , pp. 138-143
    • Johnson, K.1    Dalton, R.2    Burley, N.3
  • 30
    • 0000567399 scopus 로고
    • Ageing and sexing pied flycatchers, Ficedula hypoleuca
    • Karlsson, L., Persson, K, & Walinder, G. 1986. Ageing and sexing pied flycatchers, Ficedula hypoleuca. Var Fagelvdrld, 45, 131-146 (in Swedish with English summary).
    • (1986) Var Fagelvdrld , vol.45 , pp. 131-146
    • Karlsson, L.1    Persson, K.2    Walinder, G.3
  • 31
    • 0002951077 scopus 로고
    • Sexual selection and the evolution of female choice
    • Kirkpatrick, M. 1982. Sexual selection and the evolution of female choice. Evolution, 36, 1-12.
    • (1982) Evolution , vol.36 , pp. 1-12
    • Kirkpatrick, M.1
  • 32
    • 0023486550 scopus 로고
    • Sexual selection by female choice in polygynous animals
    • Kirkpatrick, M. 1987. Sexual selection by female choice in polygynous animals. A. Rev. Ecol. Syst., 18, 43-70.
    • (1987) A. Rev. Ecol. Syst. , vol.18 , pp. 43-70
    • Kirkpatrick, M.1
  • 33
    • 0021562460 scopus 로고
    • Truth in advertising: The kinds of traits favored by sexual selection
    • Kodric-Brown, A, & Brown, J. H. 1984. Truth in advertising: the kinds of traits favored by sexual selection. Am. Nat., 124, 309-323.
    • (1984) Am. Nat. , vol.124 , pp. 309-323
    • Kodric-Brown, A.1    Brown, J.H.2
  • 34
    • 0028175890 scopus 로고
    • Song structures reflect male quality in pied flycatchers, Ficedula hypoleuca
    • Lampe, H. & Espmark, Y. O. 1994. Song structures reflect male quality in pied flycatchers, Ficedula hypoleuca. Anim. Behav., 47, 869-876.
    • (1994) Anim. Behav. , vol.47 , pp. 869-876
    • Lampe, H.1    Espmark, Y.O.2
  • 35
    • 0019854663 scopus 로고
    • Models of speciation by sexual selection of polygenic traits
    • Lande, R. 1981. Models of speciation by sexual selection of polygenic traits. Proc. natn. Acad. Set. U.S.A., 78, 3721-3725.
    • (1981) Proc. Natn. Acad. Set. U.S.A. , vol.78 , pp. 3721-3725
    • Lande, R.1
  • 36
    • 0003010084 scopus 로고
    • Female pied flycatchers Ficedula hypoleuca choose male characteristics in homogenous habitats
    • Lifjeld, J. T. & Slagsvold, T. 1988. Female pied flycatchers Ficedula hypoleuca choose male characteristics in homogenous habitats. Behav. Ecol. Sociobiol, 22, 27-36.
    • (1988) Behav. Ecol. Sociobiol , vol.22 , pp. 27-36
    • Lifjeld, J.T.1    Slagsvold, T.2
  • 38
    • 0025224262 scopus 로고
    • Female choice and the evolution of the conspicuous plumage coloration of monogamous great tits
    • Norris, K. J, 1990. Female choice and the evolution of the conspicuous plumage coloration of monogamous great tits. Behav. Ecol. Sociobiol., 26, 129-138.
    • (1990) Behav. Ecol. Sociobiol. , vol.26 , pp. 129-138
    • Norris, K.J.1
  • 39
    • 0000174214 scopus 로고
    • Phenotypic plasticity and the handicap principle
    • Nur, N. & Hasson, O. 1984, Phenotypic plasticity and the handicap principle. J. theor. Biol, 110, 275-297.
    • (1984) J. Theor. Biol , vol.110 , pp. 275-297
    • Nur, N.1    Hasson, O.2
  • 41
    • 0001607399 scopus 로고
    • Mate quality and mating decisions
    • (P. Bateson, Cambridge: Cambridge University Press
    • Parker, G. A. 1983. Mate quality and mating decisions. In: Mate Choice (Ed. by P. Bateson), pp. 141-164. Cambridge: Cambridge University Press.
    • (1983) Mate Choice , pp. 141-164
    • Parker, G.A.1
  • 42
    • 0020466528 scopus 로고
    • Ecological consequences of song matching: Breeding success and intraspecific song mimicry in indigo buntings
    • Payne, R. B. 1982. Ecological consequences of song matching: breeding success and intraspecific song mimicry in indigo buntings. Ecology, 63, 401-411.
    • (1982) Ecology , vol.63 , pp. 401-411
    • Payne, R.B.1
  • 43
    • 0023661906 scopus 로고
    • The costs of choice in sexual selection
    • Pomiankowski, A. 1987. The costs of choice in sexual selection. J. theor. Biol, 128, 195-218.
    • (1987) J. Theor. Biol , vol.128 , pp. 195-218
    • Pomiankowski, A.1
  • 44
    • 0021537080 scopus 로고
    • Sexual selection on body size, territory and plumage variables in a population of Darwin’s finches
    • Price, T. D. 1984. Sexual selection on body size, territory and plumage variables in a population of Darwin’s finches. Evolution, 38, 327-341.
    • (1984) Evolution , vol.38 , pp. 327-341
    • Price, T.D.1
  • 45
    • 0001727408 scopus 로고
    • Winter versus summer explanations of delayed plumage maturation in temperate, passerine birds
    • Rohwer, S. & Butcher, G. S. 1988. Winter versus summer explanations of delayed plumage maturation in temperate, passerine birds. Am. Nat., 131, 556-572.
    • (1988) Am. Nat. , vol.131 , pp. 556-572
    • Rohwer, S.1    Butcher, G.S.2
  • 46
    • 0020947473 scopus 로고
    • Male plumage colour and mate choice of female pied flycatchers Ficedula hypoleuca
    • Roskaft, E. & Jarvi, T. 1983, Male plumage colour and mate choice of female pied flycatchers Ficedula hypoleuca. Ibis, 125, 396-400.
    • (1983) Ibis , vol.125 , pp. 396-400
    • Roskaft, E.1    Jarvi, T.2
  • 47
    • 0020354098 scopus 로고
    • The evolutionary effects of mate selection
    • Searcy, W. A. 1982. The evolutionary effects of mate selection. A. Rev. Ecol. Syst., 13, 57-85.
    • (1982) A. Rev. Ecol. Syst. , vol.13 , pp. 57-85
    • Searcy, W.A.1
  • 48
    • 0022208767 scopus 로고
    • Unifying genetic models for the evolution of female choice
    • Seger, J. 1985. Unifying genetic models for the evolution of female choice. Evolution, 39, 1185-1193.
    • (1985) Evolution , vol.39 , pp. 1185-1193
    • Seger, J.1
  • 49
    • 0022835666 scopus 로고
    • Nest site settlement by the pied flycatcher: Does the female choose her mate for the quality of his house or himself?
    • Slagsvold, T. 1986. Nest site settlement by the pied flycatcher: does the female choose her mate for the quality of his house or himself? Ornis Scand, 17, 210-220.
    • (1986) Ornis Scand , vol.17 , pp. 210-220
    • Slagsvold, T.1
  • 50
    • 0026330196 scopus 로고
    • Mate choice models: Can cost of searching and cost of courtship explain mating patterns of female pied flycatchers?
    • Slagsvold, T. & Dale, S. 1991. Mate choice models: can cost of searching and cost of courtship explain mating patterns of female pied flycatchers? Ornis Scand, 22, 319-326.
    • (1991) Ornis Scand , vol.22 , pp. 319-326
    • Slagsvold, T.1    Dale, S.2
  • 51
    • 0028179427 scopus 로고
    • Polygyny in the pied flycatcher is due to restricted mate sampling, not deception of females
    • Slagsvold, T. & Dale, S. 1994. Polygyny in the pied flycatcher is due to restricted mate sampling, not deception of females. Behav. Ecol. Sociobiol, 134, 239-250.
    • (1994) Behav. Ecol. Sociobiol , vol.134 , pp. 239-250
    • Slagsvold, T.1    Dale, S.2
  • 52
    • 0000914355 scopus 로고
    • Plumage colour and sexual selection in the pied flycatcher Ficedula hypoleuca
    • Slagsvold, T. & Lifjeld, J. T. 1988. Plumage colour and sexual selection in the pied flycatcher Ficedula hypoleuca. Anim. Behav., 36, 395-407.
    • (1988) Anim. Behav. , vol.36 , pp. 395-407
    • Slagsvold, T.1    Lifjeld, J.T.2
  • 54
    • 0000068965 scopus 로고
    • Plumage color is a condition-dependent sexual trait in male pied flycatchers
    • Slagsvold, T. & Lifjeld, J. T. 1992. Plumage color is a condition-dependent sexual trait in male pied flycatchers. Evolution, 46, 825-828.
    • (1992) Evolution , vol.46 , pp. 825-828
    • Slagsvold, T.1    Lifjeld, J.T.2
  • 55
    • 0000914354 scopus 로고
    • On the cost of searching for a mate in female pied flycatchers Ficedula hypoleuca
    • Slagsvold, T., Lifjeld, J. T., Stenmark, G. & Breiehagen, T. 1988. On the cost of searching for a mate in female pied flycatchers Ficedula hypoleuca. Anim. Behav., 36, 433-442.
    • (1988) Anim. Behav. , vol.36 , pp. 433-442
    • Slagsvold, T.1    Lifjeld, J.T.2    Stenmark, G.3    Breiehagen, T.4
  • 56
    • 0026268317 scopus 로고
    • Evolution of plumage color in male pied flycatchers (Ficedula hypoleuca)-. evidence for female mimicry
    • Slagsvold, T. & Saetre, G.-P. 1991. Evolution of plumage color in male pied flycatchers (Ficedula hypoleuca)-. evidence for female mimicry. Evolution, 45, 910-917.
    • (1991) Evolution , vol.45 , pp. 910-917
    • Slagsvold, T.1    Saetre, G.-P.2
  • 57
    • 0001296061 scopus 로고
    • Polygyny in the pied flycatcher Ficedula hypoleuca: A test of the deception hypothesis
    • Stenmark, G., Slagsvold, T. & Lifjeld, J. T. 1988. Polygyny in the pied flycatcher Ficedula hypoleuca: a test of the deception hypothesis. Anim. Behav., 36, 1646-1657.
    • (1988) Anim. Behav. , vol.36 , pp. 1646-1657
    • Stenmark, G.1    Slagsvold, T.2    Lifjeld, J.T.3
  • 58
    • 0002162985 scopus 로고
    • Pied flycatcher
    • I. Newton, London: Academic Press
    • Sternberg, H, 1989, Pied flycatcher. In: Lifetime Reproduction in Birds (Ed, by I. Newton), pp. 55-74. London: Academic Press.
    • (1989) Lifetime Reproduction in Birds , pp. 55-74
    • Sternberg, H.1
  • 59
    • 85027633633 scopus 로고    scopus 로고
    • Food provisioning in the pied flycatcher: Do females gain direct benefits from choosing bright coloured males?
    • Saetre, G.-P., Fossnes, T. & Slagswold, T, In press. Food provisioning in the pied flycatcher: do females gain direct benefits from choosing bright coloured males? J. Anim. Ecol.
    • J. Anim. Ecol
    • Saetre, G.-P.1    Fossnes, T.2    Slagswold, T.3
  • 60
    • 0027036694 scopus 로고
    • Evidence for sex recognition from plumage colour by the pied flycatcher, Ficedula hypoleuca
    • Saetre, G.-P. & Slagsvold, T. 1992. Evidence for sex recognition from plumage colour by the pied flycatcher, Ficedula hypoleuca. Anim. Behav., 44, 293-299.
    • (1992) Anim. Behav. , vol.44 , pp. 293-299
    • Saetre, G.-P.1    Slagsvold, T.2
  • 61
    • 0016752446 scopus 로고
    • Mate selection: A selection for a handicap
    • Zahavi, A. 1975. Mate selection: a selection for a handicap? J. theor. Biol., 53, 205-214.
    • (1975) J. Theor. Biol. , vol.53 , pp. 205-214
    • Zahavi, A.1
  • 62
    • 0017379123 scopus 로고
    • The cost of honesty (Further remarks on the handicap principle)
    • Zahavi, A. 1977. The cost of honesty (further remarks on the handicap principle). J. theor. Biol., 67, 603-605.
    • (1977) J. Theor. Biol. , vol.67 , pp. 603-605
    • Zahavi, A.1


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