Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 43.2, Problem 3TYK
Summary Introduction

Introduction:

The mean number of progenies that a woman produces during her life span is called thenet reproductive rate (R0). The reproductive rate is calculated by the given formula:

R 0 = l x mx

Where,

R0 = net reproductive rate,

S = sum of all age class,

lx = age-specific survivorship and

mx = age-specific fertility.

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Which set of values for the intrinsic rate of increase, finite rate of increase, and net reproductive rate could describe the same growing population? (Note: you should not need to do any math to figure this one out. Just think through general interpretations of each parameter) Or = -0.14, A = 0.87, RO = 0.5 r = 3.0, A = 0.22, RO = 0.5 r = 0.22, A = 1.25, RO = 3.0 %3! r = = 0.22, A = -0.14, RO = 0.5
The following equation is used to calculate the population growth rate, Ro, per generation from a life table. Iy is survival probability from birth to age x and my is fecundity at age x. Ro = Elkm Multiplying ly and my and summing it over all age categories in the life table gives the population growth rate per generation because: Calculating the reproductive output for each age class requires considering the survival probability to that age (a dead individual does not reproduce) and the fecundity at that age by multiplying them with each other. Summing over reproductive output for all age classes gives the total per capita growth rate of the population The fecundity at each age is lower when the survival is higher because of energy constraints. Multiplying probability of survival and fecundity in each age class takes this trade-off into account. Summing over reproductive output for all age classes gives the total per capita growth rate of the population The resulting type of growth…
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