the 4 questions

Question 1

how do phenotypes influence reproductive success (LIFE-HISTROY STRATEGY)

Answer 1

age and size at maturity
number and size of offspring
sex-allocation
life-span

Question 2

how do phenotypes influence reproductive success (BEHAVIOURAL ECOLOGY)

Answer 2

mate choice
parental care
foraging
competition for resources

Question 3

what is behaviour?

Answer 3

the sum of the responses of an organism to internal and external stimuli
can be instinctive or learnt

Question 4

Tinbergen’s four questions

Answer 4

HOW DOES IT WORK?- control
HOW DID IT DEVELOP? - ontogeny
WHAT IS IT FOR?- function
HOW DID IT EVOLVE?- evolution

Question 5

Control of claw waving in Uca

Answer 5

Approach of male or female Uca into
territory of male.

Question 6

ontogeny of claw waving in Uca

Answer 6

Large males- Major chela grows even more rapidly, eventually constituting about 38%.

Large females- Claws remain about 8% of the body weight throughout their life.

Question 7

function of claw waving in Uca

Answer 7

Defence of burrow against rival males
species recognition
male attraction
all factors that relate to reproductive success

Question 8

evolution of claw waving in Uca

Answer 8

Genus: Uca
All show marked cheliped asymmetry and use chela for signalling.

Family: Ocypodidae -
Ghost crabs, fiddler crabs, etc.
Asymmetry common. Signalling function.

Order: Decapoda
Cheliped asymmetry is common.
Signalling function for chelae in some cases

Question 9

proximate questions?

Answer 9

Control
development

Question 10

ultimate questions?

Answer 10

FUNCTION
EVOLUTO