Winning by a neck: Sexual selection in the evolution of giraffe

American Naturalist

Volumn 148, Issue 5, 1996, Pages 771-786

  Simmons, Robert E ^a,b   Scheepers, Lue ^b  

^a UPPSALA UNIVERSITY   (Sweden)

^b Ministry of Environment and Tourism   (Namibia)

Author keywords

[No Author keywords available]

Indexed keywords

EVOLUTION; FIGHTING; GIRAFFE; INTRASEXUAL COMPETITION; OKAPI; SEXUAL SELECTION;

GIRAFFA CAMELOPARDALIS; OKAPIA JOHNSTONI;

EID: 0030303555     PISSN: 00030147     EISSN: None     Source Type: Journal    
DOI: 10.1086/285955     Document Type: Article

References (69)

1. Andersson, M. 1994. Sexual selection. Princeton University Press, Princeton, N.J.
2. Backhaus, D. 1961. Beobachtungen an Giraffen in Zoologischen Garten und freier Wildbahn. Institut des Parcs Nationals du Congo et du Ruanda-Urundi, Brussels.
3. Berger, J. 1986. Wild horses of the Great Basin: social competition and population size. University of Chicago Press, Chicago.
4. Brownlee, A. 1963. Evolution of the giraffe. Nature (London) 200:1022.
5. Calder, W. A. 1984. Size, function and life history. Harvard University Press, Cambridge, Mass.
6. Churcher, C. S. 1976. Giraffidae. Pages 509-535 in V. J. Maglio, ed. Evolution of mammals in Africa. Princeton University Press, Princeton, N.J.
7. Clutton-Brock, T. H. 1982. The function of antlers. Behaviour 79:108-121.
8. Clutton-Brock, T. H., S. D. Albon, and P. Harvey. 1980. Antlers, body size and breeding group size in the Cervidae. Nature (London) 285:565-567.
9. Coe, M. J. 1967. "Necking" behavior in the giraffe. Journal of Zoology (London) 151:313-321.
10. Colbert, E. H. 1938. The relationships of the okapi. Journal of Mammalogy 19:47-64.
11. Dagg, A. I., and J. B. Foster. 1976. The giraffe, its biology, behavior and ecology. Van Nostrand Reinhold, New York.
12. Darwin, C. 1871. The origin of species and the descent of man in relation to sex. John Murray, London.
13. de Clerck, A. 1965. Letter on giraffe mortality. African Wildlife 19:34.
14. du Toit, J. T. 1990. Feeding height stratification among African browsing ruminants. African Journal of Ecology 28:55-61.
15. Estes, R. D. 1991a. The behavior guide to African mammals. University of Chicago Press, Chicago.
16. _. 1991b. The significance of horns and other male secondary sexual characters in female bovids. Applied Animal Behavior Sciences 29:403-451.
17. Fisher, R. A. 1930. The genetical theory of natural selection. Clarendon, Oxford.
18. Foster, J. B., and A. I. Dagg. 1972. Notes on the biology of the giraffe. East African Wildlife Journal 10:1-16.
19. Geist, V. 1966. The evolution of horn-like organs. Behaviour 27:175-214.
20. Gould, S. J. 1973. Positive allometry of antlers in the "Irish Elk," Megaloceros giganteus. Nature (London) 244:375-376.
21. Gould, S. J., and E. Vrba. 1982. Exaptation - a missing term in the science of form. Paleobiology 8:4-15.
22. Grafen, A. 1990. Biological signals as handicaps. Journal of Theoretical Biology 144:517-546.
23. Grant, P. R. 1986. Ecology and evolution of Darwin's finches. Princeton University Press, Princeton, N.J.
24. Greaves, N. 1988. When hippo was hairy and other tales from Africa. Bok, Durban.
25. Guy, P. 1976. The feeding behavior of elephant (Loxondonta africana) in the Sengwe area of Rhodesia. South African Journal of Wildlife Research 6:55-63.
26. Hall-Martin, A. J. 1976. Dentition and age determination of the giraffe Giraffa camelopardalis. Journal of Zoology (London) 180:263-289.
27. Harris, J. M. 1974. Orientation and variability in the ossicones of African Sivatheriinae (Mammalia: Giraffidae). Annals of the South African Museum 65:189-198.
28. _. 1976. Pleistocene giraffidae (Mammalia, artiodactyla) from East Rudolf, Kenya. Pages 283-332 in R. J. G. Savage, ed. Fossil vertebrates of Africa. Vol 4. Academic Press, London.
29. Harvey, P. H., and M. D. Pagel. 1991. The comparative method in evolutionary biology. Oxford University Press, Oxford.
30. Huxley, J. S. 1931. The relative size of antlers in deer. Proceedings of the Zoological Society of London 1931:819-864.
31. Innis, A. C. 1958. The behavior of the giraffe Giraffa camelopardalis in the eastern Transvaal. Proceedings of the Zoological Society of London 131:245-278.
32. ISIS. 1989. Species distribution report. Mammals. ISIS, Minnesota.
33. Jarman, P. J. 1974. The social organisation of antelope in relation to their ecology. Behaviour 48:215-266.
34. Kodric-Brown, A., and J. H. Brown. 1984. Truth in advertising: the kinds of traits favored by sexual selection. American Naturalist 124:309-323.
35. Lande, R. 1987. Genetic correlations between sexes in the evolution of sexual dimorphism and mating preferences. Pages 83-94 in J. W. Bradbury and M. B. Andersson, eds. Sexual selection: testing the alternatives. Wiley, Chichester.
36. Leuthold, B. M., and W. Leuthold. 1972. Food habits of giraffe in Tsavo National Park, Kenya. East African Wildlife Journal 16:1-20.
37. Leuthold, W. 1978. Ecological separation among browsing ungulates in the Tsavo East National Park, Kenya. Oecologia (Berlin) 35:241-252.
38. Lillywhite, H. B. 1991. Sauropods and gravity. Natural History 12:33.
39. McMahon, T. 1973. Size and shape in biology. Science (Washington, D.C.) 179:1201-1204.
40. _. 1975. Allometry and biomechanics: limb bones in adult ungulates. American Naturalist 109:547-563.
41. McNaughton, S. J., and N. J. Georgiadis. 1986. Ecology of African grazing and browsing mammals. Annual Review of Ecology and Systematics 17:39-65.
42. Møller, A. P. 1992. Patterns of fluctuating asymmetry in weapons: evidence for reliable signalling of quality in beetle horns and bird spurs. Proceedings of the Royal Society of London B, Biological Sciences 248:199-206.
43. Owen-Smith, N. 1993. Comparative mortality rates of male and female kudus: the costs of sexual dimorphism. Journal of Animal Ecology 62:428-440.
44. Pellew, R. A. 1984a. The feeding ecology of a selective browser, the giraffe (Giraffa camelopardalis tippelskirchi). Journal of Zoology (London) 202:57-81.
45. _. 1984b. Food consumption and energy budgets of the giraffe. Journal of Applied Ecology 21:141-159.
46. Peters, R. H. 1983. The ecological implications of body size. Cambridge University Press, Cambridge.
47. Petrie, M. 1988. Infra-specific variation in structures that display competitive ability: large animals invest relatively more. Animal Behaviour 36:1174-1179.
48. _. 1992. Are all secondary sexual display structures positively allometric and if so, why? Animal Behaviour 43:173-175.
49. Pienaar, U. De V. 1969. Predator-prey relationships among the larger mammals of the Kruger National Park. Koedoe 12:108-176.
50. Pincher, C. 1949. Evolution of the giraffe. Nature (London) 164:29.
51. Pomiankowski, A., and L. Sheridan. 1994. Linked sexiness and choosiness. Trends in Ecology & Evolution 9:242-244.
52. Pratt, D. M., and V. H. Anderson. 1982. Population, distribution, and behavior of giraffe in the Arusha National Park, Tanzania. Journal of Natural History 16:481-489.
53. _. 1985. Giraffe social behavior. Journal of Natural History 19:771-781.
54. Resnik, M. 1989. Losing face. Custos 18:50-51.
55. Sauer, J. J. C., J. D. Skinner, and A. W. H. Neitz. 1982. Seasonal utilization of leaves by giraffes Giraffa camelopardalis, and the relationship of the seasonal utilization to the chemical composition of the leaves. South African Journal of Zoology 17:210-219.
56. Sinclair, A. R. E., and M. Norton-Griffiths, eds. 1979. Serengeti: dynamics of an ecosystem. University of Chicago Press, Chicago.
57. Singer, R., and E. L. Bone. 1960. Modern giraffes and the fossil giraffids of Africa. Annals of the South African Museum 45:375-548.
58. Slijper, E. J. 1946. Comparative biological-anatomical investigation on the vertebral column and spinal musculature of mammals. Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen, Afdeling Natuurkunde 42:1-128.
59. Smithers, R. H. N. 1983. Mammals of the southern African subregion. Pretoria University Press, Pretoria.
60. Spalinger, D. E., and N. T. Hobbs. 1992. Mechanisms of foraging in mammalian herbivores: new models of functional response. American Naturalist 140:325-348.
61. Spinage, C. A. 1959. The "necking" of giraffes. Field 214:147.
62. _. 1968. Horns and other bony structures of the skull of the giraffe, and their functional significance. East African Wildlife Journal 6:53-61.
63. SPSS. 1992. Statistical package for the social sciences. SPSS, Chicago.
64. Sokal, R. R., and F. J. Rohlf. 1981. Biometry. 2d ed. W. H. Freeman, New York.
65. Walther, F. 1960. "Antilopenhafte" Verhaltensweisen im Paarungszeremoneill des okapi (Okapia johnstoni, Sclater 1901). Zeitschrift für Tierpsychologie 17:188-210.
66. Warren, J. V. 1974. The physiology of the giraffe. Scientific American 231:96-105.
67. Young, J. Z. 1950. The life of vertebrates. Clarendon, Oxford.
68. Young, T. P., and L. A. Isbell. 1991. Sex differences in giraffe feeding ecology: energetics and social constraints. Ethology 87:79-89.
69. Zahavi, A. 1975. Mate selection: a selection for handicap. Journal of Theoretical Biology 53:205-214.