WLF 448: Fish & Wildlife Population Ecology
Lecture Notes IV, Fall 1999

 

LIFE TABLE ANALYSIS: Comparison of life tables constructed from samplea of living vs. dying and using time-specific vs. dynamic techniques.

. Life-Table Analysis From Sample of Living . Life-Table Analysis From Sample of Dying
Time-Specific . Dynamicb . Dynamic
Age Interval lx dx qx . lx dx qx . lx dx qx
0-1 10,000 6,000 60% . 16,665 10,000 60% . 10,000 6,000 60%
1-2 4,000 2,400 . . 6,665 4,000 . . 4,000 2,400 .
2-3 1,600 960 . . 2,665 1,600 . . 1,600 960 .
3-4 640 384 . . 1,065 640 . . 640 384 .
4-5 256 154 60% . 425 256 60% . 256 154 60%
5-6 102 61 . . 169 102 . . 102 61 .
6-7 41 25 . . 67 41 . . 41 25 .
7-8 16 9 . . 26 16 . . 16 9 .
8-9 7 4 . . 10 7 . . 7 4 .
9-10 3 3 . . 3 3 . . 3 3 .
. 16,665 10,000 60% . 27,757 16,665 60% . 16,665 10,000 60%

a Based on hypothetical population with an annual mortality rate (qx) of 60%.

b Lack's method. Also known as age-specific or cohort method.

Return to Lecture Notes IV. Estimation of Population Parameters - II.

 

Updated 02 August 1996