Influence of environmental conditions on sex allocation in the black rhinoceros population of Mkhuze Game Reserve, South Africa

African Journal of Ecology

Volumn 49, Issue 4, 2011, Pages 471-480

  Weladji, Robert B ^a   Laflamme Mayer, Karine ^a  

^a Dept of Electrical and Computer Engineering   (Canada)

Author keywords

Conservation; Diceros bicornis; Endangered species; Extrinsic modification hypothesis; Population management; Sex ratio

Indexed keywords

BODY CONDITION; CONSERVATION MANAGEMENT; EL NINO-SOUTHERN OSCILLATION; ENDANGERED SPECIES; ENVIRONMENTAL CONDITIONS; NATURAL SELECTION; POPULATION SIZE; POPULATION STRUCTURE; PREGNANCY; PROBABILITY; RAINFALL; REPRODUCTIVE SUCCESS; SEX ALLOCATION; UNGULATE;

KWAZULU-NATAL; MKHUZE GAME RESERVE; SOUTH AFRICA;

DICEROS BICORNIS;

EID: 81855197089     PISSN: 01416707     EISSN: 13652028     Source Type: Journal    
DOI: 10.1111/j.1365-2028.2011.01280.x     Document Type: Article

References (56)

1. Adcock, K. (1994) The relevance of 'territorial' behaviour in black rhino to their population management. In: Proceedings of a Symposium on Rhinos as Game Ranch Animals (Eds B. Penzorn and N. Kriek ). Onderstepoort, Republic of South Africa, 9-10 September 1994.
2. Amin, R., Okita-Ouma, B., Adcock, K., Emslie, R.H., Mulama, M. & Pearce-Kelly, P. (2006) An integrated management strategy for the conservation of Eastern black rhinoceros Diceros bicornis michaeli in Kenya. Int. Zoo Yearbook 40, 118-129.
3. Berkeley, E.V. & Linklater, W.L. (2010) Annual and seasonal rainfall may influence progeny sex ratio in the black rhinoceros. S. Afr. J. Wildl. Res. 40, 53-57.
4. Bronson, F.H. (1985) Mammalian reproduction - an ecological perspective. Biol. Reprod. 32, 1-26.
5. Cameron, E.Z. & Linklater, W.L. (2007) Extreme sex ratio variation in relation to change in condition around conception. Biol. Lett. 3, 395-397.
6. Caughley, G. (1977) Analysis of Vertebrate Populations. John Wiley and Sons, New York, NY, U.S.A.
7. Clark, A.B. (1978) Sex-ratio and local resource competition in a prosimian primate. Science 201, 163-165.
8. Clutton-Brock, T.H., Albon, S.D. & Guinness, F.E. (1981) Parental investment in male and female offspring in polygynous mammals. Nature 289, 487-489.
9. Clutton-Brock, T.H. & Iason, G.R. (1986) Sex-ratio variation in mammals. Q. Rev. Biol. 61, 339-374.
10. Conway, A.J. & Goodman, P.S. (1989) Population characteristics and management of black rhinoceros Diceros bicornis minor and white rhinoceros Ceratotherium simum simum in ndumu-game-reserve, South-Africa. Biol. Conserv. 47, 109-122.
11. Dennis, P.M., Rajala-Schultz, P.J., Funk, J.A., Blumer, E.S., Miller, R.E., Wittum, T.E. & William, J.A. (2007) Risk factors associated with a skewed natal sex ratio in captive black rhinoceroses (Diceros bicornis) in the United States. J. Zoo Wildl. Med. 38, 533-539.
12. Emslie, R.H. & Adcock, K. (1994) Feeding ecology of black rhinos. In: Proceedings of a Symposium on Rhinos as Game Ranch Animals (Eds B.L. Penzhorn and N.P.J. Kriek ). Onderstepoort, Republic of South Africa, 9-10 September 1994.
13. Emslie, R.H. & Brooks, P.M. (1999) African Rhino. Status Survey and Action Plan. IUCN/SSC, Gland, Switzerland and Cambridge, U.K.
14. Forsyth, D.M., Tustin, K.G., Gaillard, J.M. & Loison, A. (2004) Fetal sex ratio variation in the highly polygynous Himalayan tahr: evidence for differential male mortality. Behav. Ecol. 15, 572-578.
15. Garnier, J.N., Bruford, M.W. & Goossens, B. (2001) Mating system and reproductive skew in the black rhinoceros. Mol. Ecol. 10, 2031-2041.
16. Ginsberg, J.R. & Milner-Gulland, E.J. (1994) Sex-biased harvesting and population-dynamics in ungulates - implications for conservation and sustainable use. Conserv. Biol. 8, 157-166.
17. Goodman, P.S. (1990) Soil, Vegetation and Large Herbivore Relations in Mkuzi Game Reserve, Natal. University of Witwatersrand, Johannesburg, South Africa.
18. Heilmann, L.C., De Jong, K., Lent, P.C. & De Boer, W.F. (2006) Will tree euphorbias (Euphorbia tetragona and Euphorbia triangularis) survive under the impact of black rhinoceros (Bicornis diceros minor) browsing in the Great Fish River Reserve, South Africa? Afr. J. Ecol. 44, 87-94.
19. Hewison, A.J.M. & Gaillard, J.M. (1996) Birth-sex ratios and local resource competition in roe deer, Capreolus capreolus. Behav. Ecol. 7, 461-464.
20. Hewison, A.J.M. & Gaillard, J.M. (1999) Successful sons or advantaged daughters? The Trivers-Willard model and sex-biased maternal investment in ungulates. Trends Ecol. Evol. 14, 229-234.
21. Hrabar, H. & Du Toit, J.T. (2005) Dynamics of a protected black rhino (Diceros bicornis) population: Pilanesberg National Park, South Africa. Anim. Conserv. 8, 259-267.
22. IUCN (2010) IUCN Red List of Threatened Species Version 2010. IUCN, Gland, Switzerland. (accessed on 9 June 2010).
23. Johnson, C.N. (1988) Dispersal and the sex-ratio at birth in primates. Nature 332, 726-728.
24. Johnson, C.N., Clinchy, M., Taylor, A.C., Krebs, C.J., Jarman, P.J., Payne, A. & Ritchie, E.G. (2001) Adjustment of offspring sex ratios in relation to the availability of resources for philopatric offspring in the common brushtail possum. Proc. Biol. Sci. 268, 2001-2005.
25. Kruuk, L.E.B., Clutton-Brock, T.H., Albon, S.D., Pemberton, J.M. & Guinness, F.E. (1999) Population density affects sex ratio variation in red deer. Nature 399, 459-461.
26. Linklater, W.L. (2007) Translocation reverses birth sex ratio bias depending on its timing during gestation: evidence for the action of two sex-allocation mechanisms. Reprod. Fertil. Dev. 19, 831-839.
27. Littell, R.C., Miliken, G.A., Stroup, W.W., Wolfinger, R.D. & Schabenberger, O. (2006) SAS for Mixed Models, 2nd edn. SAS Institute Inc, Cary, NC, U.S.A.
28. Milner, J.M., Nilsen, E.B. & Andreassen, H.P. (2007) Demographic side effects of selective hunting in ungulates and carnivores. Conserv. Biol. 21, 36-47.
29. Morgan, S., Mackey, R.L. & Slotow, R. (2009) A priori valuation of land use for the conservation of black rhinoceros (Diceros bicornis). Biol. Conserv. 142, 384-393.
30. Mukinya, J.G. (2005) Density, distribution, population structure and social organization of the black rhinoceros in Masai Mara Game Reserve. E. Afr. Wildl. J. 11, 385-400.
31. Mulqueeny, C.M. (2005) Spatial and Temporal Variation of the Fire Regime in Mkuzi Game Reserve. University of Witwatersrand, Johannesbourg, South Africa.
32. Mysterud, A. & Ostbye, E. (2006) Effect of climate and density on individual and population growth of roe deer Capreolus capreolus at northern latitudes: the Lier valley, Norway. Wildl. Biol. 12, 321-329.
33. Mysterud, A., Yoccoz, N.G., Stenseth, N.C. & Langvatn, R. (2000) Relationships between sex ratio, climate and density in red deer: the importance of spatial scale. J. Anim. Ecol. 69, 959-974.
34. Ogutu, J.O. & Owen-Smith, N. (2003) ENSO, rainfall and temperature influences on extreme population declines among African savanna ungulates. Ecol. Lett. 6, 412-419.
35. Ogutu, J.O. & Owen-Smith, N. (2005) Oscillations in large mammal populations: are they related to predation or rainfall? Afr. J. Ecol. 43, 332-339.
36. Okita-Ouma, B., Amin, R., Van Langevelde, F. & Leader-Williams, N. (2010) Density dependence and population dynamics of black rhinos (Diceros bicornis michaeli) in Kenya's rhino sanctuaries. Afr. J. Ecol. 48, 791-799.
37. Owen-Smith, N. (1990) Demography of a large herbivore, the greater kudu tragelaphus-strepsiceros, in relation to rainfall. J. Anim. Ecol. 59, 893-913.
38. Patton, F., Campbell, P. & Parfet, E. (2008) Biological management of the high density black rhino population in Solio Game Reserve, central Kenya. Pachyderm 44, 72-79.
39. Plotz, R.D. & Linklater, W.L. (2009) Black rhinoceros (Diceros bicornis) calf succumbs after lion predation attempt: implications for conservation management. Afr. Zool. 44, 283-287.
40. Post, E., Forchhammer, M.C., Stenseth, N.C. & Langvatn, R. (1999) Extrinsic modification of vertebrate sex ratios by climatic variation. Am. Nat. 154, 194-204.
41. Rachlow, J.L. & Berger, J. (1998) Reproduction and population density: trade-offs for the conservation of rhinos in situ. Anim. Conserv. 1, 101-106.
42. Rasmussen, H.B., Wittemyer, G. & Douglas-Hamilton, I. (2006) Predicting time-specific changes in demographic processes using remote-sensing data. J. Appl. Ecol. 43, 366-376.
43. Reid, C., Slotow, R., Howison, O. & Balfour, D. (2007) Habitat changes reduce the carrying capacity of Hluhluwe-Umfolozi Park, South Africa, for critically endangered black rhinoceros Diceros bicornis. Oryx 41, 247-254.
44. SAS (2008) SAS/STAT Guide for Personal Computers, Version 9.2. SAS Institute Inc., Cary, NC, U.S.A.
45. Sheldon, B.C. & West, S.A. (2004) Maternal dominance, maternal condition, and offspring sex ratio in ungulate mammals. Am. Nat. 163, 40-54.
46. Silk, J.B. (1983) Local resource competition and facultative adjustment of sex-ratios in relation to competitive abilities. Am. Nat. 121, 56-66.
47. Silk, J.B. & Brown, G.R. (2008) Local resource competition and local resource enhancement shape primate birth sex ratios. Proc. Biol. Sci. 275, 1761-1765.
48. Skinner, J.D. & Smithers, R.H.N. (1990) The Mammals of the Southern African Subregion. University of Pretoria, Pretoria, South Africa.
49. Slade, B.E., Schulte, B.A. & Rasmussen, L.E.L. (2003) Oestrous state dynamics in chemical communication by captive female Asian elephants. Anim. Behav. 65, 813-819.
50. Sokal, R.R. & Rohlf, F.J. (2000) Biometry. Freeman, San Francisco, CA, U.S.A.
51. Tainton, N.M. (1999) Veld Burning. Veld Management in South Africa. University of Natal Press, Pietermaritzburg, South Africa.
52. Tatman, S.C., Stevens-Wood, B. & Smith, V.B.T. (2000) Ranging behaviour and habitat usage in black rhinoceros, Diceros bicornis, in a Kenyan sanctuary. Afr. J. Ecol. 38, 163-172.
53. Trivers, R.L. & Willard, D.E. (1973) Natural-selection of parental ability to vary sex-ratio of offspring. Science 179, 90-92.
54. Weladji, R.B. & Holand, Ø. (2003) Sex ratio variation in reindeer Rangifer tarandus: a test of the extrinsic modification hypothesis. Wildl. Biol. 9, 29-36.
55. West, S.A., Shuker, D.M. & Sheldon, B.C. (2005) Sex-ratio adjustment when relatives interact: a test of constraints on adaptation. Evolution 59, 1211-1228.
56. White, F.J. (2009) Sex ratio at birth and age-reversed dominance among female Varecia. Folia Primatol. 80, 341-352.