Age, Sex, Fertility and Mortality at Two Sites on the Middle San Juan River

1
Age, Sex, Fertility and Mortality at Two Sites on
the Middle San Juan River

• Jesse D. Fuhrman

2
Research Goals

• Infer population growth from
• Age-at-Death Distribution
• Mortality
• Mean Age-at-Death
• Life Expectancy
• D30/D5
• Fertility
• D5-/D45
• Sex Ratio Imbalance

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Age Categories
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Tommy Site

• Mortality
• Mean Age-at-Death 21.16
• Life Expectancy
• e0 21.56 more years (Age 21.56)
• e5 26.45 more years (Age 29.45)
• e20 19.57 more years (Age 39.57)
• D30/D5 0.531

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Tommy Site
6
Mine Canyon Site

• Mortality
• Mean Age-at-Death 21.16
• Life Expectancy
• e0 29.10 more years (Age 29.10)
• e5 29.18 more years (Age 34.18)
• e20 20.70 more years (Age 40.70)
• D30/D5 0.635

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Mine Canyon Site
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Life Expectancy (e0) Comparison

• Tommy Site 21.6
• Mine Canyon Site 29.1

• Puebloan Average 20.5
• Puebloan Max
• Pueblo Bonito 26.3

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Fertility Comparison

• D5-/D45
• Tommy Site 2.3
• Mine Canyon Site 0.8

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Sex Ratio Background
-from Kohler and Turner 2006
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Sex Ratio Analysis

• 11th Century
• SJ Region Male Percentage 58.1
• Central SJ Male Percentage 28.3
• Tommy Site Male Percentage 28.0

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Sex Ratio Analysis

• 13th Century
• Northern SJ Male Percentage 63.9
• Totah Male Percentage 34.1
• Mine Canyon Site Male Percentage 56.3

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Conclusions

• Life Expectancy Improves
• Mortality Decreases
• Fertility Decreases
• Sex Ratio Imbalance Shifts