Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 54, Problem 3Q
Summary Introduction
To analyze:
The generation time (G) for given population by completing the last column of the given Table 1.
Given:
An incomplete cohort life table is provided, from which the components given in column 5 is to be calculated.
Table 1: A life table of Australian sharpnose shark showing survivorship and fecundity.
Age (x) | Survivorship of females (lx) | Fecundity of female offspring (mx) | lx mx | x lx mx |
0 | 1 | 0 | 0 | |
1 | 0.32 | 1.98 | 0.63 | |
2 | 0.19 | 2.59 | 0.49 | |
3 | 0.11 | 2.81 | 0.31 | |
4 | 0.06 | 2.89 | 0.17 | |
5 | 0.03 | 2.92 | 0.08 | |
6 | 0.02 | 2.93 | 0.06 | |
7 | 0.01 | 2.93 | 0.03 | |
8 | 0.005 | 2.93 | 0.014 | |
9 | 0.003 | 2.93 | 0.008 | |
10 | 0.002 | 0 | 0 |
Introduction:
The generation time of a cohort is considered as the average age of the individuals who have produced or are expected to produce offspring in a cohort. It can be calculated by the sum of (x lx mx) divided by the reproductive rate, R0 of the population.
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Life: The Science of Biology
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