Estimation of the Period of Childhood and Child Growth Characteristics of Pygmy Hunter-Gatherers in Southeast Cameroon

  • Taro Yamauchi
  • Izumi Hagino
Part of the Replacement of Neanderthals by Modern Humans Series book series (RNMH)


Data on the growth pattern of pygmy hunter-gatherers may provide key knowledge about the mechanism of human evolution. However, only few studies have compared their growth pattern with those of modern human populations. This study aims at characterizing the growth pattern of pygmy hunter-gatherers by using a mathematical method and comparing their pattern with that of other worldwide populations. Height and weight of 626 Baka children in southeast Cameroon were measured. The nutritional status was assessed using body mass index (BMI), and the Preece-Baines function was adopted for obtaining height velocity curve and assessing growth pattern. More than 80 % participants had BMI in the normal range, and their nutritional status was considered generally good. The height velocity curves and biological parameters indicated that their adolescent growth spurts were very week. However, the periods of adolescent growth spurt of Baka children were almost similar to those of previously studied five groups. Furthermore, their growth rate during the early childhood was suggested to be very slow. The periods of childhood were the same among the modern human populations. However, a great difference was observed in the linear growth rate between the Baka and other populations.


Adolescent growth spurt Growth pattern Period of childhood Pygmy hunter-gatherers 


  1. Bailey RC (1991) The comparative growth of Efe pygmies and African farmers from birth to age 5 years. Ann Hum Biol 18:113–120CrossRefGoogle Scholar
  2. Billewicz WZ, McGregor IA (1982) A birth-to-maturity longitudinal study of heights and weight in two West African (Gambian) villages, 1951–1975. Ann Hum Biol 9:309–320CrossRefGoogle Scholar
  3. Bogin B, Wall M, Macvean RB (1990) Longitudinal growth of high socioeconomic status Guatemalan children analyzed by the Preece–Baines function: an international comparison. Am J Hum Biol 2:271–281CrossRefGoogle Scholar
  4. Brown T, Townsend GC (1982) Adolescent growth in height of Australian Aboriginals analysed by the Preece–Baines function: a longitudinal study. Ann Hum Biol 9:485–505Google Scholar
  5. Cole TJ, Bellizzi MC, Flegal KM et al (2000) Establishing a standard definition for child overweight and obesity worldwide: international survey. Br Med J 320:1240–1243CrossRefGoogle Scholar
  6. Cole TJ, Flegal KM, Nicholls D et al (2007) Body mass index cut offs to define thinness in children and adolescents: international survey. Br Med J 335:194–197CrossRefGoogle Scholar
  7. Hauspie RC, Das SR, Preece MA et al (1980) A longitudinal study of growth in height of boys and girls of West Bengal (India) aged six months to 20 years. Ann Hum Biol 7:429–441CrossRefGoogle Scholar
  8. Kulin HE, Bwibo N, Mutie D et al (1982) The effect of chronic childhood malnutrition on pubertal growth and development. Am J Clin Nutr 36:527–536Google Scholar
  9. Largo RH, Gasser T, Prader A et al (1978) Analysis of the adolescent growth spurt using smoothing spline functions. Ann Hum Biol 5:421–434CrossRefGoogle Scholar
  10. Milani S (2000) Kinetic models for normal and impaired growth. Ann Hum Biol 27:1–18CrossRefGoogle Scholar
  11. Preece MA, Baines MJ (1978) A new family of mathematical models describing the human growth curve. Ann Hum Biol 5:1–24CrossRefGoogle Scholar
  12. Travaglino P, Meazza C, Pagani S et al (2011) Secular trends in growth of African Pygmies and Bantu. Hormones (Athens) 10:144–148Google Scholar
  13. Turnbull C (1965) Wayward servants: the two World of African Pygmies. The American Museum of National History, New YorkGoogle Scholar
  14. van de Koppel JMH, Hewlett BS (1986) Growth of Aka Pygmies and Bangandus of the Central African Republic. In: Cavalli-Sforza LL (ed) African Pygmies. Academic, OrlandoGoogle Scholar
  15. Weiner JS, Lounie JA (1981) Practical human biology. Academic, LondonGoogle Scholar
  16. World Health Organization (WHO) (1995) WHO Physical status: the use and interpretation of anthropometry. Report of a WHO Expert Committee 854Google Scholar
  17. Yamauchi T, Sato H, Kawamura K (2000) Nutritional status, activity pattern, and dietary intake among the Baka hunter-gatherers in the village camps in Cameroon. Afr Study Monogr 21:67–82Google Scholar
  18. Yamauchi T, Hayashi K, Kawamura K et al (2009) Nutritional status, physical activity, and dietary intake of Pygmy hunter-gatherers in Cameroon. In: Louts T, Reitenbach M, Molenbroek J (eds) Human diversity: design for life. Delft University of Technology, Delft, pp 78–81Google Scholar
  19. Zemel BS, Johnson FE (1994) Application of the Preece-Baines growth model to cross-sectional data: problems of validity and interpretation. Am J Hum Biol 6:563–570CrossRefGoogle Scholar

Copyright information

© Springer Japan 2014

Authors and Affiliations

  1. 1.Laboratory of Human Ecology, Faculty of Health SciencesHokkaido UniversitySapporoJapan
  2. 2.Laboratory of Human Ecology, Graduate School of Health SciencesHokkaido UniversitySapporoJapan

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