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

Jesse D. Fuhrman

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

Age Categories

Broad Age Category Narrow Age Category

0-19

0-4

5-9

10-14

15-19

20-3420-24

25-29

30-34

35-4935-39

40-44

45-49

50+50-54

55-60

60+

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

Tommy Site

Tommy Site Age-at-Death Distribution

0%

5%

10%

15%

20%

25%

30%

35%

40%

0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60+

Age Categories

Per

cent

age

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

Mine Canyon Site

Mine Canyon Site Age-at-Death Distribution

0%

5%

10%

15%

20%

25%

30%

35%

40%

0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60+

Age Categories

Per

cent

age

Life Expectancy (e0) Comparison

• Tommy Site: 21.6

• Mine Canyon Site: 29.1

• Puebloan Average: 20.5

• Puebloan Max

• Pueblo Bonito: 26.3

Fertility Comparison

• D5-/D45+

• Tommy Site: 2.3• Mine Canyon Site: 0.8

Sex Ratio Background

-from Kohler and Turner 2006

Sex Ratio Analysis

• 11th Century• SJ Region Male Percentage: 58.1%

• Central SJ Male Percentage: 28.3%

• Tommy Site Male Percentage: 28.0%

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

SJ Region Central SJ Subregion Tommy Site

Region

Mal

e P

erce

ntag

e

Sex Ratio Analysis

• 13th Century• Northern SJ Male Percentage: 63.9%

• Totah Male Percentage: 34.1%

• Mine Canyon Site Male Percentage: 56.3%

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

Northern SJ Region Totah Subregion Mine Canyon Site

Region

Mal

e P

erce

nta

ge

Conclusions

• Life Expectancy Improves

• Mortality Decreases

• Fertility Decreases

• Sex Ratio Imbalance Shifts