Territoriality and aggression Flashcards
Give 4 reasons for forming a territory
Exclusive access to- Food Mates Nesting sites Cover
How do Blockheads use landmarks?
Used to define borders of territory, reduce fighting and allow more pairs to establish a territory.
What is the difference between territory and home range?
Territories require patrolling and defending/aggression.
When do golden winged sunbirds defend their food sources?
When nectar levels are low.
Name a bird species that shares territory with unrelated individuals
Pied wagtail.
What is an Evolutionary stable strategy (ESS)?
A strategy which, if all the members of a population adopt it, no mutant strategy can invade.
Give the 3 types of coloration and states of side blotched lizards
- Orange- aggressive, defend large territories with many females
- Blue- Mildly aggressive, defend small territory with one female
- Yellow- look like females, do not defend territories, sneak matings.
What are the factors that affect resource holding potential?
Residency Body size Resource valuation Motivation Energy reserves Prior experience
What is ‘Sequential assessment game (SAG)”?
Continuous assessment in bouts
- Start with least dangerous behaviour
- Once you have all the information, move on to..
- The next most dangerous behaviour
And so on, until…
You realise your opponent is better, and retreat
Give an example of a sequential assessment game.
Red deer- avoid cost by assessment.
- Roars (good physical condition, body size)
- Parallel walk (closer assessment of size)
- Interlock antlers (rare)
(Or cichlids- Lateral orientation, tail beating and then biting, weight asymmetry decides.)
Exaplain bourgeois strategy
Owner of territory is the likely winner
When do red spotted newt fights over females last longer?
When the female is larger.
