week 8- adaptive dynamics

Question 1

what are the two roles in hermit crab contests

Answer 1

attackers: perform shell rapping
defenders: remain withdrawn

Question 2

how do oxygen conditions affect hermit crab contest

Answer 2

in oxygen starved conditions time in between shell-rapping bouts increases

number of shell-rapping bouts until defenders are evicted by attackers does not depend on oxygen conditions

Question 3

use Stuart fox tree to discuss what game theoretical model best describes hermit crab contests

Answer 3

hermit crab are attackers or defenders
no behavioural matching so contests best described as SAM or CAM
CAM: defenders compare the vigour of rapping with an absolute threshold rather that with a relative threshold when making their decision

Question 4

what is adaptive dynamics

Answer 4

studies the long-term evolution of traits in populations assuming that:
1. mutations are infrequenent
2. individuals with the mutant strategy are rare
3. mutant phenotypes are only slightly different from the resident phenotypes

Question 5

how does adaptive dynamics extend evolutionary game theory and quantitative genetics theory

Answer 5

-evolving traits are continuous (EGT)
-trait dynamics are described (EGT)
-density and frequency dependence is allowed (QGT)
-structured population dynamics are allowed (QGT)
-fitness landscapes are derived (QGT)
-mutational convariences and constraints can be examined (EGT)
-coevolution is integrated (QGT)
-Non-equilibrium population dynamics are allowed (QGT)

Question 7

what is invasion fitness

Answer 7

initial per capita growth rate of a small variant population within a large resident population at ecological equilibrium