Encyclopedia of Evolutionary Psychological Science

Living Edition
| Editors: Todd K. Shackelford, Viviana A. Weekes-Shackelford

Adaptation for Single Births

  • Natalie LaudicinaEmail author
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-16999-6_721-1

Synonyms

Definition

The propensity for primates, including humans, to have only one fetus at a time.

Introduction

Mammalian infants are born at either of two stages: altricial or precocial. Altricial infants are those that are born immature and helpless, e.g., rodents. Precocial infants are born able to move about soon after birth, e.g., deer. Animals that are born precocial, like primates, are K-selected, meaning that they give birth to a smaller number of offspring at a time (MacArthur and Wilson 1967; Martin 1983; Pianka 1970). Humans are part of a group of primates known as “higher primates” which typically give birth to single offspring at a time (Martin 2007). Having fewer offspring at a time allows the fetus to have a larger body size at birth and be more developed at birth in order to increase the chance of survival (Martin 2013). The adaptation for having a single fetus at a time may be a result of the ancestral morphology, or shape, of the...

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References

  1. Dunsworth, H. M., Warrener, A. G., Deacon, T., Ellison, P. T., & Pontzer, H. (2012). Metabolic hypothesis for human altriciality. Proceedings of the National Academy of Sciences, 109(38), 15212–15216.CrossRefGoogle Scholar
  2. Hamlett, G. W. D., & Wislocki, G. B. (1934). A proposed classification for types of twins in mammals. The Anatomical Record, 61(1), 81–96.CrossRefGoogle Scholar
  3. MacArthur, R. H., & Wilson, E. O. (1967). The theory of island biogeography. Princeton: Princeton University Press.Google Scholar
  4. Martin, R. D. (1983). Human brain evolution in an ecological context. New York: American Museum of Natural History.Google Scholar
  5. Martin, R. D. (2007). The evolution of human reproduction: A primatological perspective. American Journal of Physical Anthropology: The Official Publication of the American Association of Physical Anthropologists, 134(S45), 59–84.CrossRefGoogle Scholar
  6. Martin, R. (2013). How we do it: The evolution and future of human reproduction. New York: Basic Books (AZ).Google Scholar
  7. Pianka, E. R. (1970). On r-and K-selection. The American Naturalist, 104(940), 592–597.CrossRefGoogle Scholar
  8. Trevathan, W. (2010). Ancient bodies, modern lives: How evolution has shaped women’s health. New York: Oxford University Press.Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Boston UniversityBostonUSA

Section editors and affiliations

  • Steven Arnocky
    • 1
  1. 1.Department of Psychology, Faculty of Arts and SciencesNipissing UniversityNorth BayCanada