Population Ecology

, 52:103 | Cite as

Persistence and local extinction of lion prides in the Ngorongoro Crater, Tanzania

Original Article

Abstract

African lions (Panthera leo) live in social groups (prides) that exhibit group territorial behavior. Pride persistence is expected to depend on its ability to compete against neighboring prides as well as on average rates of reproduction and survival, thus providing a meaningful measure of intergenerational reproductive success. We used Akaike’s Information Criterion (AIC) to select the best approximating models explaining how demographic variables influenced pride persistence during a 30-year period in the Ngorongoro Crater, Tanzania, and identified landscape factors affecting those demographic variables. Pride persistence to 10 years depended on adult female density (pride size) and cub productivity (the ultimate source of new females). Average age of adult females had a weakly positive influence on pride persistence, while the effect of female mortality was weakly negative. Adult female mortality increased with disease epidemics and in territories with high human disturbance. Cub productivity was highest in territories closest to rivers and only slightly higher near swamps, and also high in areas of higher vegetative cover and high human use. No landscape variable significantly affected female density. The growth and population size of the Crater lions was closely linked to demographic performance of individual prides, while territorial behavior played a key role in mediating the interactive effects of landscape and demography.

Keywords

Anthropogenic factors Disease outbreak Landscape variables Pride territory Reproductive success Territorial behavior 

References

  1. Anderson DR, Burnham KP (2002) Avoiding pitfalls when using information-theoretic methods. J Wildl Manage 66:912–918CrossRefGoogle Scholar
  2. Bradbury JW, Vehrencamp SL (1976) Social organization and foraging in Emballonurid bats. Behav Ecol Sociobiol 1:337–381CrossRefGoogle Scholar
  3. Budnik JM, Thompson FR III, Ryan MR (2002) Effect of habitat characteristics on the probability of parasitism and predation of bell’s vireo nests. J Wildl Manage 66:232–239CrossRefGoogle Scholar
  4. Burnham KP, Anderson DR (2002) Model selection and multimodal inference: a practical information-theoretic approach, 2nd edn. Springer, New YorkGoogle Scholar
  5. Bygott JD, Bertram BCR, Hanby JP (1979) Male lions in large coalitions gains reproductive advantages. Nature 282:839–841CrossRefGoogle Scholar
  6. Estes RD (2002) Ngorongoro Crater ungulate study (1996–1999) final report, Part 1. Unpublished reportGoogle Scholar
  7. Estes RD, Small R (1981) The large herbivore population of Ngorongoro Crater. Proceedings of the fourth annual African wildlife symposium. Afr J Ecol 19:175–185CrossRefGoogle Scholar
  8. Estes RD, Atwood JL, Estes AB (2006) Downward trends in Ngorongoro Crater ungulate populations 1986–2005: Conservation concerns and the need for ecological research. Biol Conserv 131:106–120CrossRefGoogle Scholar
  9. Flynn M (2007) Modeling event count data with PROC GENMOD and the SAS system. Statistics, Data Analysis, and Modeling. Paper 265 (www.sas.com/proceedings/sugi24/stats/p265-24)
  10. Fretwell SD, Calver JS (1969) On territorial behavior and other factors influencing habitat distribution in birds. 2. Sex ratio variation in dickcissel. Acta Biotheor 19:37–44CrossRefGoogle Scholar
  11. Funston PJ, Mills MGL, Biggs HC (2001) Factors affecting the hunting success of male and female lions in the Kruger national park. J Zool (Lond) 253:419–431CrossRefGoogle Scholar
  12. Funston PJ, Mills MGL, Richardson PRK, Van Jaarsveld AS (2003) Reduced dispersal and opportunistic territory acquisition in male lions (Panthera leo). J Zool (Lond) 259:131–142CrossRefGoogle Scholar
  13. Fyumagwa RD, Runyoro V, Horak IG, Hoare R (2007) Ecology and control of ticks as disease vectors in wildlife of the Ngorongoro Crater, Tanzania. S Afr J Wildl Res 37:79–90CrossRefGoogle Scholar
  14. Hayward MW, O’ Brien J, Kerley GIH (2007) Carrying capacity of large African predators: predictions and tests. Biol Conserv 139:219–229CrossRefGoogle Scholar
  15. Hopcraft JGC, Sinclair ARE, Packer C (2005) Planning for success: Serengeti lions seek prey accessibility rather than abundance. J Anim Ecol 74:559–566Google Scholar
  16. Ikanda DK, Packer C (2008) Ritual vs. retaliatory killing of African lions in the Ngorongoro Conservation Area, Tanzania. Endang Species Res 6:67–74CrossRefGoogle Scholar
  17. Kissui BM (2008) Livestock predation by lions, leopards, sported hyenas, and their vulnerability to retaliatory killing in the Maasai steppe, Tanzania. Anim Conserv 11:422–432CrossRefGoogle Scholar
  18. Kissui BM, Packer C (2004) Top-down population regulation of a top predator: lions in the Ngorongoro Crater. Proc R Soc Lond B 271:1867–1874CrossRefGoogle Scholar
  19. Macdonald D (1983) The ecology of carnivore social behavior. Nature 301:379–384CrossRefGoogle Scholar
  20. McComb K, Packer C, Pusey A (1994) Roaring and numerical assessment in contests between groups of female lions (Panthera leo). Anim Behav 47:379–387CrossRefGoogle Scholar
  21. Miyashita T, Suzuki M, Takada M, Fujita G, Ochiai K, Asada M (2007) Landscape structure affects food quality of sika deer (Cervus nippon) evidenced by fecal nitrogen levels. Popul Ecol 49:185–190CrossRefGoogle Scholar
  22. Mosser A (2008) Group territoriality of the African lion: behavioral adaptation in a heterogeneous landscape. PhD thesis, University of Minnesota, MinneapolisGoogle Scholar
  23. Mosser A, Packer C (2009) Group territoriality and the benefits of sociality in the African lion, Panthera leo. Anim Behav. doi:10.1016/j.anbehav.2009.04.024
  24. Packer C, Pusey AE (1987) Intrasexual cooperation and the sex ratio in African lions. Am Nat 130:636–642CrossRefGoogle Scholar
  25. Packer C, Pusey AE (1993) Dispersal, kinship, and inbreeding in African lions. In: Thornhill NW (ed) The natural history of in breeding and out breeding. University of Chicago Press, Chicago, pp 375–391Google Scholar
  26. Packer C, Pusey AE (1995) The lack clutch in a communal breeder: lion litter size is a mixed evolutionary stable strategy. Am Nat 145:833–841CrossRefGoogle Scholar
  27. Packer C, Herbst L, Pusey AE, Bygott JD, Hanby JP, Cairns SJ, Borgerhoff Mulder M (1988) Reproductive success in lions. In: Clutton-Brock TH (ed) Reproductive success. University of Chicago Press, Chicago, pp 363–383Google Scholar
  28. Packer C, Scheel D, Pusey AE (1990) Why lions form groups: food is not enough. Am Nat 136:1–19CrossRefGoogle Scholar
  29. Packer C, Pusey AE, Rowley H, Gilbert DA, Martenson J, O’Brien SJ (1991) Case study of a population bottleneck: lions of Ngorongoro Crater. Conserv Biol 5:219–230CrossRefGoogle Scholar
  30. Packer C, Tatar M, Collins A (1998) Reproductive cessation in female mammals. Nature 392:807–811CrossRefPubMedGoogle Scholar
  31. Packer C, Altizer S, Appel M, Brown E, Martenson J, O’brien SJ, Roelke-Parker M, Hofmann-Lehmann R, Lutz H (1999) Viruses of the Serengeti: pattern of infection and mortality in African lions. J Anim Ecol 68:1161–1178CrossRefGoogle Scholar
  32. Packer C, Pusey AE, Eberly LE (2001) Egalitarianism in female African lions. Science 293:690–693CrossRefPubMedGoogle Scholar
  33. Packer C, Hilborn R, Mosser A, Kissui B, Borner M, Hopcraft G, Wilmshurst J, Mduma S, Sinclair ARE (2005) Ecological change, group territoriality, and population dynamics in Serengeti lions. Science 307:390–393CrossRefPubMedGoogle Scholar
  34. Peak RG, Thompson FR III, Shaffer TL (2004) Factors affecting songbird nest survival in riparian forests in a Midwestern agricultural landscape. Auk 121:726–737CrossRefGoogle Scholar
  35. Pusey AE, Packer C (1987) The evolution of sex-biased dispersal in lions. Behavior 101:275–310CrossRefGoogle Scholar
  36. Schaller GB (1972) Serengeti lion; a study of predator–prey relations. University of Chicago Press, ChicagoGoogle Scholar
  37. Spong G (2002) Space use in lions, Panthera leo, in the Selous Game Reserve: social and ecological factors. Behav Ecol Sociobiol 52:303–307CrossRefGoogle Scholar
  38. Stralberg D, Williams B (2002) Effect of residential development and landscape composition on the breeding birds of Placer County’s foothill oak woodlands: USDA Forest Service. USDA Forest Service Gen Tech Report, pp 341–366Google Scholar
  39. Worton BJ (1989) Kernel methods for estimating the utilization distribution in home range studies. Ecology 70:164–168CrossRefGoogle Scholar
  40. Zimmerman GS, La-Haye WS, Gutiérrez RJ (2003) Empirical support for a despotic distribution in a California spotted owl population. Behav Ecol 14:433–437CrossRefGoogle Scholar

Copyright information

© The Society of Population Ecology and Springer 2009

Authors and Affiliations

  1. 1.African Wildlife FoundationArushaTanzania
  2. 2.Department of Ecology, Evolution and BehaviorUniversity of MinnesotaSt. PaulUSA

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