01:119:101 Study Guide - Quiz Guide: Survivorship Curve

72 views1 pages

silverporcupine51

21 Jul 2016

School

Department

Course

Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Document Summary

One piece of information that a biologist can learn from demographics is the relative number of organisms in each age class. One piece of information that a biologist can learn from a survivorship curve is at what age organisms in a certain species is at the highest risk of death. One piece of information that a biologist can learn from a reproductive table is a population"s number of fertile females in each age class. The reproductive characteristics of an organism that fits into a type i curve are low death rate in early years of life and the death rate grows with age. This is because of k-selection and the parental care that is given during these early years. Density is the number of organisms in a population. Dispersion is how spread out a population is.

Related Questions

You are asked to assess that status of a population of a tree species and are given only one month to make your assessment. You conduct a field survey in which you determine the age of all living trees in the population. You also survey the literature and learn that this species typically begins producing seeds in your area at 12 years of age. You find the following from your field survey:

Age class (yrs)	Number of trees
1-9	0
10-19	1
20-29	0
30-39	22
40-49	63
50-59	15

If this is all you know about this population, your best guess is that this tree population is most likely:

a) increasing

b)decreasing

ceruleanscorpion888

1. Life expectancies differ across populations. Life expectancy at birth in the U.S. is currently around 78 years (76 for males; 81 for females). Consider a population in which life expectancy at birth is 50. Given what you know about life history theory, discuss how this population would differ from the U.S. across the following life history characteristics: age at first marriage, age at first reproduction, total fertility (number of children born per female), length of time spent in school, and money spent on education. Be sure to support your predictions using life history theory.

2. The following data on interbirth interval (time between births), child survivorship, and percent of children married were collected to evaluate reproductive decisions within a population. Assuming a woman of this population has a 20-year reproductive span (maximum time available from first to last birth), use these data to 1) calculate the maximum number of live births a woman could have, and 2) determine the number of births that will lead to the highest fitness (surviving children who marry) if we assume that all married children will have the same number of offspring. To receive credit, you must show your work. Lastly, what are the implications of your results?

% child %

IBI (months) Survivorship ever married

12	0.6	0.4
15	0.64	0.47
18	0.68	0.54
21	0.72	0.61
24	0.76	0.68
27	0.8	0.75
30	0.84	0.82
33	0.88	0.89
36	0.88	0.96
39	0.89	0.96
42	0.9	0.96
45	0.91	0.96
48	0.92	0.96
51	0.93	0.96
54	0.94	0.96
57	0.95	0.96
60	0.96	0.96

1. The vast majority of animals are:

a. mammals b. invertebrates c. vertebrates d. birds

2. Which of the following scientists defined a species as one or more groups of individuals that can potentially interbreed, produce fertile offspring, and do not interbreed with other groups?

a. Charles Darwin b. Carolus Linnaeus c. Mary Leakey d. Ernst Mayr

3.The earliest primitive primates resembled the modern ___________.

a. tarsier b. tree shrew c. old world monkey d.lemur

4. Stromatolites were formed by:

a. animals b. archaebacterial c. cyanobacteria d. red algae

5. Members of the same species would be expected to:

a.look alike b. be reproductively isolated from one another c. share the same gene pool d.have the same phenotype

6. A species is composed of:

a. related organisms b. a group of reproductive females c. populations that have the potential to interbreed and produce fertile offspring d. organisms located in the same habitat

01:119:101 Study Guide - Quiz Guide: Survivorship Curve

Document Summary

Get access

Related Documents

01:119:101 Lecture Notes - Lecture 21: Carl Linnaeus, Georges Cuvier, James Hutton

MATH 1014 Lecture Notes - Lecture 15: Survivorship Curve, Maximum Life Span, Life Table

BIOL 1001 Chapter Notes - Chapter 10: Survivorship Curve, Maximum Life Span, Life Table

Related Questions