BISC 102 Lecture Notes - Lecture 21: Australopithecus Garhi, Homo Erectus, Homo Naledi

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November 12th, 2015
No reading assignments for this lecture.
Reminders:
Ecology assignment is due next Thursday
(November 19th)
drop o a hard copy in one of the boxes
by 12:30pm
late assignments lose 2 marks per day
don’t submit paper copies of the
science daily or journal article
so not submit in a file or folder (only
stapled sheets)
do not submit a cover page -put name,
IS number, lab section (dxxx) at the top
of page 1
try to print double sided
What are we doing today?
sexual selection: quick review
competition
mate choice
what women want
does it increase their reproductive
success?
what men want
does it increase their reproductive
success
human mating systems
Homo Habilis - The Handy Man
2.4-1.6 mya
short jaw and small molars
larger brain (600-750 cc)
tool use
Tool Use
appears more than 2 mya
H. habilis and/or A. garhi (450cc)
shift in diet?
evidence of cognition
Homo ergaster - The Working man
1.9 to 1.5 mya
long slender legs
small teeth
larger brain (900cc)
reduced sexual dimorphism
Homo erectus - The erect man
1.8 mya to 190,000 ya
out of Africa to Asia
Homo neaderthaensis
200,000 to 25,000 ya
Europe and the Near East
cold-adapated
large brain (1200-1700cc)
did neanderthals and humans interbreed?
Homo sapiens
oldest fossils 195,000 ya from Ethiopia
migrated out of Africa - 115,000 ya
derived characters
abstract thought
innovation
symbolism
goal-directed behaviour
1.6% dierence 5-7 my
Homo Naledi
new species of human ancestor discovered in
south africa
Human Behaviour
Sexual Selection - a process by which individuals
that have traits that increase their mating success
are favoured over individuals that do not have these
traits
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