Flashcards in Maintaining populations in the wild Deck (56)
What is MVP?
Minimal viable population
What is PVA?
Population Viability Analysis
MVP is the what?
PVA is the what?
What are the components of Population Viability Analysis?
Population structure and fitness
What are population phenotypes?
Give an example of morphology
Variation in size, shape and patterns
Give an example of physiology
Give an example of intra and inter specific behaviour
Give an example of behavioural distribution
What are the components of the environment?
Give an example of the factors in habitat quality
Abundance of resources
Abundance of species
Patterns of disturbance
What are the components of population structure and fitness?
Dynamics of spatial distribution
Age and size
What types of extinction are there?
A change of force from which there is no escape. Something essential is removed or introduced
Results from normal random changes or environmental perturbations
Give an example of a stochastic event
The thinning of a population that doesn’t cause it to become extinct
What is the problem with the thinning of a population?
Increased risk of another random event
Also, if the population has been thinned why may their be an increased risk of extinction?
Lower populations are more likely to be vulnerable
Define viable population size
Smallest number of individuals needed to give a population a high probability of survival in a specified period of time
Give an example of a species that has been studied for a viable population size
The Big Horn Sheep
What was the viable population size of the big horn sheep?
Why do certain populations decline?
Give an example of the genetic problems that cause populations to decline
Give an example of the demographic influences that cause populations to decline
Random variations in birth and death rates
Give an example of the type of environmental fluctuations that cause populations to decline
In a generation, a population of 500 will lose what percentage of its genetic diversity?
In what ways can genetic drift be prevented?
By ensuring connectivity between populations of species
What is an effective population?
50 based on domesticated animals, but basically between 50-500 individuals