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Lecture 7

ANTC23H3 Lecture Notes - Lecture 7: Mate Choice, Laryngeal Ventricle, Polygynandry


Department
Anthropology
Course Code
ANTC23H3
Professor
Joyce Parga
Lecture
7

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Lecture 7 June.14.11 BLUE FONT
SLIDE SEXUAL DIMORPHISM:
Body size and shape
Colour: sexual dichromatism
SLIDE SEXUAL DIMORPHISM (CONT.):
Sexual Monomorphism : sexes are the same size, colour, etc.
SLIDE SEXUAL DIMORPHISM (CONT.) 2:
Why? Male-male physically aggressive contest competition over females
Larger body size in males has been selected for because this trait has been adaptive in
these species
SLIDE 2 TYPES OF COMPETITION:
1)Contest competition : when a resource can be monopolized by a single individual or
group and can be fought over (size and strength are an advantage)
SLIDE 2 TYPES OF COMPETITION (CONT.):
2)Scramble competition : when a resource is exploited by the individual that arrives
and uses it first
Example: aye-ayes are solitary, when females are estrus, whoever finds her first can
mate with her
SLIDE SEXUAL DIMORPHISM & MATING SYSTEMS:
Polygyny
SLIDE SEXUAL DIMORPHISM & MATING SYSTEMS (CONT.):
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