Lecture nineteen Flashcards
Do predator-prey interactions cause populations to oscillate?
In general, yes
Do predators reduce prey populations?
In general, prey N is lower in the presence vs. absence of predators
Are predator and prey population sizes linked through DD or DI interactions?
Density dependent
Which rates (b or d) are influenced by predators and prey on one another?
Prey - death rate
Predator - birth rate
What is functional response?
The relationship between prey density and predator consumption rate
What three things influence the prey capture efficiency of a predator?
Learning efficient capture techniques
Prey switching to more abundant prey
Refuge for prey to hide from predators
What is numerical response?
Increasing the prey consumption rate by the predator causes an increase in the offspring production rate by the predator
I the lotka volterra model, does predation vary in direct proportion to H and P?
Yes, as H and P increase encounter rates of predators and prey increase
Do predators die at a constant rate? Is it dependent on the N of prey in the population?
Yes, no it is dependent on the number of predators (Intraspecific competition)
What doe we assume about predator-prey interactions?
That they result in a stabilization of pop growth for both pops
Describe co-evolution
Predators acts as a selective pressure on prey, prey adapt traits that reduce chances of being detected and captured. Prey one step ahead of the predators
