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
Where,
S = sum of all age class,
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Which of the following populations would be growing?
a) Geometric rate (1) = 0.63
b) Exponential growth rate (r) = 0.63
c) Net reproductive rate (R0) = 0.63
d) All of the above populations are growing
Use the information provided:
population experiences density-dependent growth
K or carrying capacity is 180
r = 0.032 individual/month
1. Calculate how many bugs are added to the population next month when population size is 65?
2. Now keeping the condition of density dependent growth, let's change some numbers: K=270 and r=0.13. If the current population is 125 bugs, how large will the population be in 12 months?
If each adult female powerful owl produces 1 female juvenile (F) each year, the adult survival rate (Sa) is 0.8, the juvenile survival rate (Sj) is 0.4, and the population is N2022=1400 adult females and 1400 juvenile females in 2022, what will be the female population size in 2027 (N2027)? Show your calculations. (hint: use excel to set up a model and check your work)
Chapter 43 Solutions
Principles of Biology
Ch. 43.1 - If we mark 110 Rocky Mountain goats andrecapture...Ch. 43.1 - Prob. 1TYKCh. 43.2 - Prob. 1BCCh. 43.2 - Prob. 1TYKCh. 43.2 - Prob. 2TYKCh. 43.2 - Prob. 3TYKCh. 43.3 - What is the population growth per unit of time...Ch. 43.3 - Prob. 1TYKCh. 43.3 - Prob. 2TYKCh. 43.4 - Prob. 1CC
Ch. 43.4 - Prob. 1BCCh. 43.4 - Prob. 2CCCh. 43.4 - Prob. 3CCCh. 43.4 - Which types of factors tend to stabilize...Ch. 43.4 - A species interaction in which one species...Ch. 43.4 - According to the competitive exclusion hypothesis....Ch. 43.4 - Prob. 3TYKCh. 43 - A student decides to conduct a mark-recapture...Ch. 43 - Prob. 2TYCh. 43 - Prob. 3TYCh. 43 - Prob. 4TYCh. 43 - Prob. 5TYCh. 43 - Prob. 6TYCh. 43 - Prob. 7TYCh. 43 - Prob. 8TYCh. 43 - Prob. 9TYCh. 43 - Prob. 10TYCh. 43 - Prob. 1CCQCh. 43 - Prob. 2CCQCh. 43 - A principle of biology is that biology affects our...Ch. 43 - Prob. 1CBQCh. 43 - Prob. 2CBQ
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- A population has 50 individuals in it, but the habitat's carrying capacity is 100 individuals. The birth rate is 2.0 and the death rate is 1.8. How many individuals would you expect to be in the population in the following generation?arrow_forwardWhat can you say about population dynamics that have fast population growth rate (i.e., a high value for r) AND also have density dependence?arrow_forwardThe per-capita birth rate of individuals in a population is 0.8, and the per-capita death rate of individuals in the same population is 0.6. Given these rates, what is happening to the size of the population? constant decreasing increasing nearing half of K randomarrow_forward
- A population grows exponentially about 2% per year. Assume that the population starts with 15 individual. How many individual will have after 10 years? After 20 years? How long will it take for the population to doube?arrow_forwardIf a population composed of 100 individuals is growing exponentially with a per capita growth rate (r) of 0.31, how many individuals will be added to the population during the next time period?arrow_forwardA continuously growing population of alligators has a population size of 1,000 and an intrinsic rate of increase of r= 0.05 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 4000?arrow_forward
- several years ago wolves were reintroduced in to a national park in North Carolina. Researchers have monitored the populations over the last several years and the per capita growth rate of the population is.5. If the current population size is 100, what equation would you use to determine how large he population will be in ten yearS? N/t *r N(1+r)^t (N*r)/t please highlight the answerarrow_forwardA continuously growing population of bears has a population size of 500 and its intrinsic rate of increase is 0.07 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 1,000? (Note: “e” is about 2.7 and the natural logarithm of 2 is about 0.70).arrow_forwardExponential population growth occurs when N=K. True Falsearrow_forward
- The per capita birth (b) and death (d) rates are measured for two populations across a range of population sizes in the attached figure. The equation for exponential growth rate is dN/dt=rN where the per capita growth rate is r=(b-d). The equation for logistic population growth rate is dN/dt=rN(1-N/K). With logistic growth, r varies as a function of the population size with density-dependent birth and/or death rates. See attached image If the death rate decreased, what would happen to the population trajectory for population A? a) increase faster b) increase slower c) decrease faster d) decrease slowerarrow_forwardAssuming an exponential model of population growth and a one-year breeding cycle for cockroach: If the initial population size (N) of cockroach at the start of year one is 200 and the per capita growth rate of the population (r) is 0.03 per year. The cockroach population size first exceeds 210 individuals at the start of year _______. a. 3 b. 4 c. 2 d. None of these choices is correct e. 1arrow_forwardIf a population eventually reached the point where it no longer changed in size, which of the below must be true? Group of answer choices K > R0 N = K R0 = K/N r = K N > Karrow_forward
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