JD L3 Flashcards
1
Q
Define predation
A
The consumption of one organism (prey) by another organism (predator) in which the prey is alive when the predator first attacks it
2
Q
What are true predators?
A
Kill prey immediately after attacking
3
Q
3 types of predators
A
- Monophagous (feeding on a single prey type)
- Oligophagous (few prey types)
- Polyphagous (many prey types)
4
Q
Lotka-Volterra prey equation
A
dN/dt = rN - aPN
5
Q
What does predator pressure do?
A
Leads to selection of phenotypes that successfully avoid predation
(camouflage, mimicry, physical defense)
6
Q
What is a trophic level?
A
Several hierarchical levels in an ecosystem, consisting of organisms sharing the same function in the food chain
7
Q
How do predator and prey populations fluctuate?
A
In a coupled oscillation
