Lecture Exam 2

Question 1

What are the three types of growth curves and what do they look like?

Answer 1

Question 2

Differentiate between the types of MSY

Answer 2

Question 3

Diagram the difference in population growth between limited versus unlimited environments (environmental resistance). Label all axes and parts as appropriate.

Answer 3

Exponential = Geometric

Question 4

Explain what a probability of sighting curve (Px) is and indicate how it’s shape affects (k) and, thus, visibility of wildlife. (i.e., the extent to which the surrounding habitat influences our ability to record birds when walking line transects).

Answer 4

k = estimate of slope of curve

Question 5

What are the 4 main assumptions of mark-recapture population estimates?

Answer 5

Continued trapping can create problems with meeting the closure assumption

Question 6

What are the main assumptions of line-transect (point) populations estimates?

Answer 6

Question 7

What are the 4 types of reproductive patterns we see in wildlife populations?

Answer 7

Chaotic: unpredictable or random
Cyclical: predictable increases and decreases over time
Damped Oscillation: population exceeds carrying capacity, then fails to meet carrying capacity, eventually settles around capacity
Crash: sudden large decline in population size over a short period of time

Question 8

What makes a population density dependent reproducers?

Answer 8

Density dependence is caused by competition for limited resources

Question 9

Define annual/harvestable surplus

Answer 9

Question 10

Define instantaneous rate of harvest and isolated rate of harvest and instantaneous rate of increase

Answer 10

Instantaneous rate of increase: increase at a particular instant

Question 11

What is maximum sustained yield

Answer 11

Maximum number of individuals that can be taken from the population over time without reducing the population in the long run

Question 12

What is compensatory mortality?

Answer 12

Question 13

What is the inflection point?

Answer 13

Point on a growth curve representing maximum population growth

Question 14

What is recruitment rate?

Answer 14

Rate at which adults are added to a population through either immigration or juveniles reaching reproductive maturity

Question 15

What is carrying capacity?

Answer 15

Question 16

Define abnormal mortality factor and proximate mortality factor

Answer 16

Question 17

Explain the Peterson estimate method and Bailey’s Improvement

Answer 17

Question 18

Describe the Hayne Fixed-Width Transect method. Who improved it and how?

Answer 18

Question 19

Define fertility/fecundity table

Answer 19

Question 20

What’s the relationship between H and r with regards to harvesting theory?

Answer 20

H = harvest rate across the year
r = instantaneous rate of pop. increase
If H = r, the population remains stable
If H > r, the population goes down
if H < r, the population goes up