Announcements
Sexual selec/on
Darwins dilemma
Constraints on evolu/on
Why are some outcomes unlikely or
impossible?
Sexual selec/on
One of Darwins
dilemmas:
Why do some organisms
go to such costly
extremes to
dV/dt = rV - aVP
dP/dt = baVP - d P
p
The dynamics this model predicts
Lotka-Volterra predator prey models
Nov 6, 2013
Competition
Announcements:
1 week until midterm #2.
Same format; likely free response problems and fewer MC
- tension test length versus
Positive interactions
Exam Next WEDNESDAY
Study Guide Posted
New Videos posted. Each posted twice:
Youtube link, Smartsite
TUESDAY Office Hours: Mark -8:15- 10AM on
Annie: Tuesday 9-11.
Monday is a Holiday
Wednesday class is about community ecology: succe
Announcements
No informal lunch today
Exam today in your sec6on in Freeborn Hall
Bring photo ID, pencil, pen
30-
35 ques6ons, 25 mul6ple choice, 5 short
answers (e.g. simple calcula6on)-
some with
mul6ple parts
Announcements
Natural selec/on meets popula/on
gene/cs
Types of natural selec/on
Direc/onal
Stabilizing
Diversifying (disrup/ve)
How do dierent forms of selec/on aect
genotype and allele frequencies?
What maintai
Functional diversity: Coping with
stress; Life histories
C. Alien
Which of these are chordates?
A. ET
B. Chewbacca
D. Sea Squirts
Oct 7 notes
Readings: Chapter 40.2-4, 51.1 are not in
the text book. posted on smartsite
Lecture Notes: 3.2
Strategies for
Announcements
The breeders equa3on
2S
R = h
Evolu3onary
response
Heritability
Selec3on
dieren3al
Selec3on dieren3al (S):
Change in popula3on mean before and
aFer selec3on in the parental genera3on
Parental genera3on
Lecture 11-
More Mendelian gene2cs
What Mendel avoided dealing with: genes are
linked on chromosomes
Linkage maps of chromosome posi2ons
Sex linkage
Gene2c interac2ons
One gene, mul2ple traits (pleiotropy)
Mul2pl
Announcements
Midterm 1: Wednesday 23 October
During your sec:on period in Freeborn Hall
You MUST take the exam in the sec:on in which
you are enrolled
See email from Pat
Covers material through discussi
TODAY we will:
1. Finish up diversity measures
2. Talk about different levels of
diversity (genes to biomes)
3. Define species
4. Describe species diversity on
Earth
5. Begin talking about where species
diversity is high or low, and why
Sept. 30, 2013
BIS
Announcements
Lecture 8: Origins of evolutionary theory
What is a theory?
General relativity
Plate tectonics
Evolution
Why are there so
many kinds of
organisms?
Why do some organisms resemble one another?
God created,
Linnaeus organized
Why so organisms s
Demography,PopulationGrowth
&AgeStructure
October11,2013
?
HumanPopulation
dN N (KN)
=
K
dt
Sameequation
r intrinsicrateofpopulationgrowth
K carryingcapacityoftheenvironment
N populationsize
t time
Addingthisbit
Logistic population growth: including densi
Strategies for dealing with the problem of maintaining temperature near the
optimum:
Ectotherms: use external sources of heat to regulate body temperature. Exhibit
behaviors or morphologies to aid in heat gain or loss.
-most species are ectotherms
Endothe
Announcements
How can natural selec0on maintain gene0c
varia0on in popula0ons?
Sexual selec0on-
a special case of natural
selec0on
Constant direc0onal selec0on should
deplete allelic varia0on (unless there is
new mut
