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Flashcards in Maintaining populations in the wild Deck (56)
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1

What is MVP?

Minimal viable population

2

What is PVA?

Population Viability Analysis

3

MVP is the what?

The product

4

PVA is the what?

The process

5

What are the components of Population Viability Analysis?

Population Phenotype
Environment
Population structure and fitness

6

What are population phenotypes?

Morphology
Physiology
Behaviour

7

Give an example of morphology

Variation in size, shape and patterns

8

Give an example of physiology

Metabolism
Reproduction
Disease resistance

9

Give an example of intra and inter specific behaviour

Courtship
Social
Interactions

10

Give an example of behavioural distribution

Dispersal
Migration
Habitat selection

11

What are the components of the environment?

Habitat quantity
Habitat quality

12

Give an example of the factors in habitat quality

Abundance of resources
Abundance of species
Patterns of disturbance

13

What are the components of population structure and fitness?

Dynamics of spatial distribution
Age and size
Sex ratio
Growth rate

14

What types of extinction are there?

Deterministic
Stochastic

15

Define deterministic

A change of force from which there is no escape. Something essential is removed or introduced

16

Define stochastic

Results from normal random changes or environmental perturbations

17

Give an example of a stochastic event

The thinning of a population that doesn’t cause it to become extinct

18

What is the problem with the thinning of a population?

Increased risk of another random event

19

Also, if the population has been thinned why may their be an increased risk of extinction?

Lower populations are more likely to be vulnerable

20

Define viable population size

Smallest number of individuals needed to give a population a high probability of survival in a specified period of time

21

Give an example of a species that has been studied for a viable population size

The Big Horn Sheep

22

What was the viable population size of the big horn sheep?

101

23

Why do certain populations decline?

Genetic problems
Demographic influences
Environmental fluctuations

24

Give an example of the genetic problems that cause populations to decline

Inbreeding
Genetic Drift

25

Give an example of the demographic influences that cause populations to decline

Random variations in birth and death rates

26

Give an example of the type of environmental fluctuations that cause populations to decline

Predations
Competition
Disease
Food supplies
Natural catastrophes

27

In a generation, a population of 500 will lose what percentage of its genetic diversity?

0.1%

28

In what ways can genetic drift be prevented?

By ensuring connectivity between populations of species

29

What is an effective population?

50 based on domesticated animals, but basically between 50-500 individuals

30

Give an example of unequal sex ratio

In elephant seals only one male mates with all of the females