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Acta Theriologica

, Volume 58, Issue 2, pp 189–197 | Cite as

Resource dispersion, territory size and group size of black-backed jackals on a desert coast

  • Jan A. J. NelEmail author
  • Rudi J. Loutit
  • Rod Braby
  • Michael J. Somers
Original Paper

Abstract

We studied the relationship between resource—food patch—richness and dispersion on group and territory size of black-backed jackals Canis mesomelas in the Namib Desert. Along beaches where food patches are mostly small, widely separated jackal group sizes are small, and territories are narrow and extremely elongated. Where food patches are rich, fairly clumped and also heterogeneous, group sizes are large and territory sizes small. At a superabundant and highly clumped food source—a large seal rookery—group sizes are large, and territoriality is absent. Although jackals feed at the coast and den nearby, individuals move linearly far inland along well-defined footpaths. The marked climatic gradient from the cold coast inland—a drop in wind speed and rise in effective temperature T e – and use of particular paths by different groups—strongly suggests that these movements are for thermoregulatory reasons only.

Keywords

Canis mesomelas Desert coast Resource dispersion Spatial organization 

Notes

Acknowledgments

Financial support was provided by the Universities of Stellenbosch and Pretoria and the National Research Foundation to Nel. Permission for conducting research and logistic support was provided by the Ministry of Wildlife and Tourism, Namibia. We thank Steven Braine, John Patterson, John Knowles, Maans Dreyer, Johan Botha and Jackie Ackerman for assisting with fieldwork. The late W.S. Barnard kindly suggested and supplied references on Namib Desert climate. We are grateful to Hans Kruuk for improvements of the previous draft.

References

  1. Avery G, Avery DM, Braine S, Loutit R (1987) Prey of coastal black-backed jackal Canis mesomelas (Mammalia: Canidae) in the Skeleton Coast Park, Namibia. J Zool 213:81–94CrossRefGoogle Scholar
  2. Berry HH, Berry CU (1975) A check list and notes on the birds of Sandvis, South West Africa. Madoqua 9(2):5–18Google Scholar
  3. Besler H (1972) Klimaverhältnisse und klimageomorphologische Zonierung der zentrale Namib (Südwestafrika). Stuttgarter Geographische Studien 83:1–208Google Scholar
  4. De Villiers DJ, Roux J-P (1992) Mortality of newborn pups of the South African fur seal Arctocephalus pusillus pusillus in Namibia. S Afr J Mar Sci 12:881–889CrossRefGoogle Scholar
  5. Dreyer HVA, Nel JAJ (1990) Feeding site selection by black-backed jackal Canis mesomelas on the Namib Desert coast. J Arid Environ 19:217–224Google Scholar
  6. Ewer RF (1977) The carnivores. Cornell University PressGoogle Scholar
  7. Hayward MW, Hayward GJ (2010) Potential amplification of territorial advertisement markings by black-backed jackals (Canis mesomelas). Behaviour 147:979–992CrossRefGoogle Scholar
  8. Hiscocks K, Perrin MR (1988) Home range and movements of black-backed jackals at Cape Cross Seal Reserve, Namibia. S Afr J Wildl Res 18:97–100Google Scholar
  9. Lamb HH (1979). Climate. Methuen, LondonGoogle Scholar
  10. Lancaster J, Lancaster N, Seely MK (1984) Climate of the central Namib Desert. Madoqua 14:5–61Google Scholar
  11. Linacre E, Hobbs T (1977) The Australian climatic condition. John WileyGoogle Scholar
  12. Lindesay JA, Tyson PD (1990) Climate and near-surface airflow over the central Namib. In: Seely M.K. (Ed.). Namib ecology: 25 years of Namib research. Transvaal Museum Monograph 7:27–37Google Scholar
  13. Logan RF (1960) The central Namib Desert South West Africa. National Academy of Science, National Research Council, Washington, D.C. Publ 758:1–162Google Scholar
  14. Loveridge AJ, Nel JAJ (2004) 6.3. Black-backed jackal Canis mesomelas Schreber 1775. In: Sillero-Zubiri, C., Hoffmann, M. & Macdonald, D. W. (Eds.); Canids: foxes, wolves, jackals and dogs. Status survey and conservation action plan. IUCN/SSC Canid Specialist group. Gland, Switzerland and Cambridge, UK: 161–166Google Scholar
  15. Macdonald DW (1979) The flexible social system of the golden jackal (Canis aureus). Behav Ecol Sociobiol 5:17–38CrossRefGoogle Scholar
  16. Macdonald DW (1983) The ecology of carnivore social behaviour. Nature 301:379–384CrossRefGoogle Scholar
  17. Maclean GL (1993) Robert’s Birds of southern Africa, 6th edn. Trustees of the John Voelcker Bird Fund, Cape Town, 848 ppGoogle Scholar
  18. Nel JAJ (1992) The coastal Namib Desert as habitat for mammals. S Afr Geogr 19:127–134Google Scholar
  19. Nel JAJ, Loutit R (1986) The diet of the black-backed jackals, Canis mesomelas, on the Namib Desert coast. Cimbebasia Series A 8(11):91–96Google Scholar
  20. Nel JAJ, Loutit R, JduP B (1997) Prey use by black-backed jackals along a desert coast. S Afr J Wildl Res 27:100–104Google Scholar
  21. Nel. J.A.J. 1984. Behavioural ecology of canids in the south-western Kalahari. In: De Graaff G. and Van Rensburg D.J. (Eds.); The Kalahari ecosystem. Koedoe 1984 Supplement: 229–235Google Scholar
  22. Oosthuizen WH, Meyer MA, David JHM, Summers NM, Kotze PGH, Swanson SW, Shaughnessy PD (1997) Variation in jackal numbers at the Van Reenen Bay seal colony with comments on likely importance of jackals as predators. S Afr J Wildl Res 27:26–29Google Scholar
  23. Polis GA, Hurd SD (1996) Linking marine and terrestrial food webs: allochthonous input from the ocean supports high secondary productivity on small Islands and coastal land communities. Am Nat 147:396–423CrossRefGoogle Scholar
  24. Rose MJ, Polis GA (1998) The distribution and abundance of coyotes: the effects of allochthonous food subsidies from the sea. Ecology 79:998–1007CrossRefGoogle Scholar
  25. Seely MK (1978) Grassland productivity: the desert end of the curve. S Afr J Sci 74:295–297Google Scholar
  26. Shaughnessy PD (1981) Interactions between fisheries and Cape fur seals in southern Africa. Report to IUCN meeting on Marine Mammal/Fishery Interaction. La Jolla, California, March-April 1981Google Scholar
  27. Skinner JD, Van Aarde RJ, Van Jaarsveld AS (1984) Adaptations in three species of large mammals (Antidorcas marsupialis, Hystrix africaeaustralis, Hyaena brunnea) to arid environments. S Afr J Zool 19:82–86Google Scholar
  28. Somers MJ, Nel JAJ (2004) Movement patterns and home range size of Cape clawless otters (Aonyx capensis), affected by high food density patches. J Zool 262:91–98CrossRefGoogle Scholar
  29. Tarr JG, Griffiths CL, Bally R (1985) The ecology of three sandy beaches on the Skeleton Coast of South West Africa. Madoqua 14:295–304Google Scholar

Copyright information

© Mammal Research Institute, Polish Academy of Sciences, Białowieża, Poland 2012

Authors and Affiliations

  • Jan A. J. Nel
    • 1
    Email author
  • Rudi J. Loutit
    • 2
  • Rod Braby
    • 2
  • Michael J. Somers
    • 3
  1. 1.Department of Botany and ZoologyUniversity of StellenboschStellenboschSouth Africa
  2. 2.Ministry of Wildlife and TourismWindhoekNamibia
  3. 3.Centre for Wildlife ManagementUniversity of PretoriaPretoriaSouth Africa

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