Primates

, Volume 44, Issue 3, pp 281–290 | Cite as

Life-history parameters of a wild group of West African patas monkeys (Erythrocebus patas patas)

  • Naofumi Nakagawa
  • Hideyuki Ohsawa
  • Yasuyuki Muroyama
Original Article

Abstract

Based on long-term, although intermittent, observations (2 years 4 months of 14 years), we present data on birth seasonality, age at first birth, interbirth intervals, mortality rates, age at first emigration, and population change of a wild population of West African patas monkeys (Etythrocebus patas patas) in northern Cameroon. Birth season was from the end of December until the middle of February, corresponding to the mid-dry season. In spite of large body size, the patas females had the earliest age at first birth (36.5 monthsold) and the shortest interbirth intervals (12 months) compared to the closely related wild forest guenons. Age at first emigration of the males was considered to occur between 2.5 and 4.5 years. The group size of the focal group drastically decreased between 1984 and 1987, and steadily increased until 1994, then decreased again in 1997. The neighboring group also showed a similar trend in group size. The population decreases were likely to be caused by drought over 3 years. Annual crude adult mortality rate was 4% during population increase periods (PIP) between 1987 and 1994. It rose to 22% during all the periods (AP), including drought over 3 years. Despite their smaller body size, the rate of the wild forest guenons (Cercopithecus mitis) (4%) was the same and much lower than those of the patas during PIP and AP, respectively. The annual average juvenile mortality rate was 13% during PIP and it also rose to 37% during AP. That of wild forest guenons (C. ascanius) (10–12%) was a little lower and much lower than those of the patas during PIP and AP, respectively. These findings were consistent with Charnov's theoretical model of mammalian life-history evolution in that patas with high adult and juvenile mortality showed early and frequent reproduction in spite of large body size. Charnov also considered high adult mortality as a selective force and high juvenile mortality as a density-dependent consequence of high fecundity. Our results support the former but not the latter research findings.

Keywords

Age at first birth Erythrocebus patas patas Interbirth intervals Life-history evolution Mortality rates 

References

  1. Bronson FH (1985) Mammalian reproduction: an ecological perspective. Biol Reprod 32:1–26PubMedGoogle Scholar
  2. Butynski TM (1988) Guenon birth seasons and correlates with rainfall and food. In: Gautier-Hion A, Bourlière F, Gautier J-P, Kingdon J (eds) A primate radiation: evolutionary biology of the african guenons. Cambridge University Press, New York, pp 284–322Google Scholar
  3. Charlesworth B (1980) Evolution in age structured populations. Cambridge University Press, CambridgeGoogle Scholar
  4. Charnov EL (1991) Evolution of life history among female mammals. Proc Natl Acad Sci USA 88:1134–1137PubMedGoogle Scholar
  5. Charnov EL, Brrigan D (1990) Dimensionless numbers and life history evolution: age at maturity versus the adult lifespan. Evol Ecol 4:273–275Google Scholar
  6. Chism J, Rowell TE, Olson D (1984) Life history patterns of female patas monkeys. In: Small M (ed) Female primates: studies by women primatologists. Liss, New York, pp 175–190Google Scholar
  7. Cords M (1987) Forest guenons and patas monkeys: male-male competition in one-male groups. In: Smuts BB, Cheney DL, Seyfarth RM, Wrangham RW, Struhsaker TT (eds) Primate Societies. University of Chicago Press, Chicago, pp 98–111Google Scholar
  8. Cords M, Rowell TE (1987) Birth intervals of Cercopithecus monkeys of the Kakamega forest, Kenya. Primates 28:277–281Google Scholar
  9. Dittus W (1975) Population dynamics of the toque monkey, Macaca sinica. In: Tuttle RH (ed) Socioecology and psychology of primates. Mouton, Paris, pp 125–151Google Scholar
  10. Dunbar RIM (1988) Primate social systems. Croom Helm, LondonGoogle Scholar
  11. Folland CK, Palmer TN, Parker DE (1986) Sahel rainfall and worldwide sea temperature, 1901–86. Nature 320:602–607Google Scholar
  12. Harvey PH, Martin RD, Clutton-Brock TH (1987) Life histories in comparative perspective. In: Smuts BB, Cheney DL, Seyfarth RM, Wrangham RW, Struhsaker TT (eds) Primate society. University of Chicago Press, Chicago, pp 181–196Google Scholar
  13. Kavanagh M (1978) National park in the sahel. Oryx 14:241–245Google Scholar
  14. Lee PC, Bowman JE (1995) Influence of ecology and energetics on primate mothers and infants. In: Pryce CR, Martin RD, Skuse D (eds) Motherhood in human and nonhuman primates. Karger, Basel, pp 47–58Google Scholar
  15. Lindburg DJ (1987) Seasonality of reproduction in primates. In: Mithchell G, Erwin J (eds) Comparative primate biology, vol. 2b. Behavior, cognition, and motivation. Liss, New York, pp 167–218Google Scholar
  16. Loy J (1981) The reproductive and heterosexual behaviours of adult patas monkeys in captivity. Anim Behav 29:714–726Google Scholar
  17. Milton K (1996) Effects of bot fly (Alouattamyia baeri) parasitism on a free-ranging howler (Alouatta palliata) population in Panama. J Zool (Lond) 239:39–63Google Scholar
  18. Nakagawa N (1989) Activity budget and diet of patas monkeys in Kala Maloue National Park, Cameroon: a preliminary report. Primates 30:27–34Google Scholar
  19. Nakagawa N (1991) Comparative feeding ecology of patas monkeys and tantalus monkeys in Kala Maloue National Park. In: Ehara A, Kimura T, Takenaka O, Iwamoto M (eds) Primatology today. Elsevier, Amsterdam, pp 119–122Google Scholar
  20. Nakagawa N (1999) Differential habitat utilization by patas monkeys (Erythrocebus patas) and tantalus monkeys (Cercopithecus aethiops tantalus), living sympatrically in northern Cameroon. Am J Primatol 49:243–264PubMedGoogle Scholar
  21. Nakagawa N (2000) Foraging energetics in patas monkeys (Erythrocebus patas) and tantalus monkeys (Cercopithecus aethiops tantalus): implications for reproductive seasonality. Am J Primatol 52:169–185PubMedGoogle Scholar
  22. Ohsawa H, Inoue M, Takenaka O (1993) Mating strategy and reproductive success of male patas monkeys (Erythrocebus patas). Primates 34:533–544Google Scholar
  23. Pianka ER (1970) On r and K selection. Am Nat 104:592–597CrossRefGoogle Scholar
  24. Purvis A, Harvey PH (1995) Mammal life-history evolution: a comparative test of Charnov's model. J Zool (Lond) 237:259–283Google Scholar
  25. Ross C (1988) The intrinsic rate of natural increase and reproductive effort in primates. J Zool (Lond) 214:199–219Google Scholar
  26. Ross C (1992a) Environmental correlates of the intrinsic rate of natural increase in primates. Oecologia 90:383–390Google Scholar
  27. Ross C (1992b) Life history patterns and ecology of macaque species. Primates 33:207–215Google Scholar
  28. Ross C (1998) Primate life histories. Evol Anthropol 6:54–63CrossRefGoogle Scholar
  29. Ross C, Jones KE (1999) Socioecology and the evolution of primate reproductive rates. In: Lee PC (ed) Comparative primate socioecology. Cambridge University Press, Cambridge, pp 73–110Google Scholar
  30. Rowell TE, Richards SM (1979) Reproductive strategies of some African monkeys. J Mammal 60:58–69Google Scholar
  31. Rutberg AT (1987) Adaptive hypotheses of birth synchrony in ruminants: an interspecific test. Am Nat 130:692–710CrossRefGoogle Scholar
  32. Sade DS, Cushing K, Cushing P, Dunaif, J, Figueroa A, Kaplan JR, Laurer C, Rhodes D, Schneider J (1976) Population dynamics in relation to social structure on Cayo Santiago. Yearb Phys Anthropol 20:253–262Google Scholar
  33. Schaffer WM (1974) Optimal reproductive effort in fluctuating environments. Am Nat 108:783–790CrossRefGoogle Scholar
  34. Struhsaker TT, Pope TR (1991) Mating system and reproductive success: a comparison of two African forest monkeys (Colobus badius and Cercopithecus ascanius). Behaviour 117:182–205Google Scholar
  35. Strum SC, Western D (1982) Variations in fecundity with age and environment in olive baboons (Papio anubis). Am J Primatol 3:61–76Google Scholar
  36. Sugiyama Y (1994) Age-specific birth rate and lifetime reproductive success of chimpanzees at Bossou, Guinea. Am J Primatol 32:311–318Google Scholar
  37. Sugiyama Y, Ohsawa H (1982) Population dynamics of Japanese monkeys with special reference to the effect of artificial feeding. Folia Primatol 39:238–263PubMedGoogle Scholar
  38. Swart J, Lawes MJ, Perrin MR (1993) A mathematical model to investigate the demographic viability of low-density samango monkeys (Cercopithecus mitis) populations in Natal, South Africa. Ecol Model 70:289–303Google Scholar

Copyright information

© Japan Monkey Centre and Springer-Verlag 2003

Authors and Affiliations

  • Naofumi Nakagawa
    • 1
  • Hideyuki Ohsawa
    • 2
  • Yasuyuki Muroyama
    • 2
  1. 1.Department of Nursing, Faculty of NursingKobe City College of NursingHyogo 651-2103Japan
  2. 2.Primate Research InstituteKyoto UniversityAichi 484–8506Japan

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