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Comment
. 2016 Jan 26;113(4):812-4.
doi: 10.1073/pnas.1523806113. Epub 2016 Jan 15.

Prehistoric hunter-gatherer population growth rates rival those of agriculturalists

Robert L Bettinger  1
Affiliations
Comment

Prehistoric hunter-gatherer population growth rates rival those of agriculturalists

Robert L Bettinger. Proc Natl Acad Sci U S A. .
No abstract available

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Conflict of interest statement

The author declares no conflict of interest.

Figures

Fig. 1.
Fig. 1.
(A) Individual radiocarbon date with a given mean and SD of error, represented by the normal curve plotted in red on the y axis at the left, is matched against the calibration curve, plotted as a blue band running from the upper left to lower right, to obtain a calibrated date, given by the intersection of the radiocarbon date with the calibration curve, shown by the probability distribution in gray at the bottom. (B) Probabilities of three calibrated radiocarbon dates are summed and normalized to obtain a summed probability distribution (SPD). (C) Three logistic growth curves depicting populations with identical intrinsic growth rates but different carrying capacities. The Wyoming-Colorado growth curve 13,000–6,000 cal BP, shown on the left, is the growth curve of a population unaffected by carrying capacity. (A and B) Both figures were redrafted from figures obtained using OxCal version 4.2.4 (2) and calibrated using an IntCal 13 atmospheric curve (3).
See this image and copyright information in PMC

Comment on

References

    1. Zahid HJ, Robinson E, Kelly RL. Agriculture, population growth, and statistical analysis of the radiocarbon record. Proc Natl Acad Sci USA. 2016;113:931–935. - PMC - PubMed
    1. Bronk Ramsey C, Lee S. Recent and planned developments of the program OxCal. Radiocarbon. 2013;55(2-3):720–730.
    1. Reimer PJ, et al. IntCal 13 and Marine 13 radiocarbon age calibration curves 0– 50,000 years cal BP. Radiocarbon. 2013;55(4):1869–1887.
    1. Surovell TA, et al. Correcting temporal frequency distributions for taphonomic bias. J Archaeol Sci. 2009;36(8):1715–1724.
    1. Frison GC. Prehistoric Hunters of the High Plains. 2nd Ed Academic; New York: 1991.

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