2. Monday 4.14 DUE today: Only Bugs/Stream data NOT DUE: Anything else
DUE next Monday: AA3Packet, Wbirds – details TBA
Schedule adjustments x 3
WUSTL seminar cancelled this week
All got 10 EP last week
Sign up for owl prowl!! 30 SP!!
Blackboard shutdown R, F: bio271.weebly.com
PQ #12
Grade distribution
See Small Mammals
Discussion on Slime Molds, Birds, Ch 13
Lab 10B: Plant competition

3. PQ #12 On a sheet of paper, answer the following:
What concept, idea, etc. from the assigned readings (13.1, 13.2, wbirds thru #11, Lab 10, slime molds) was most unclear? (That is, what do you still have questions about, or what did you understand the least?)
What part(s) of this same concept, idea, etc., do you understand? (That is, which part(s) can you explain clearly or which make sense?)
With both of these responses in mind, what can or will you do to prepare for this concept, idea, etc. appearing on an exam?

4. Group 1:
Exam: 76%
PQ: 76.6%
Total: pts
Group 2:
Exam: 66%
PQ: 51.1%
Total: pts
Read. The. Book.

5. Small Mammals in Missouri
All images are from Wikimedia Commons, unless otherwise identified

6. Eastern cottontail Sylvilagus floridanus

7. Nine-banded armadillo Dasypus novemcinctus

8. Eastern spotted skunk Spilogale putorius

9. Striped skunk Mephitis mephitis

10. Opossum Didelphis virginiana

11. Gray fox Urocyon cinereoargenteus

12. American mink Neovison vison

13. Least weasel Mustela nivalis

14. Eastern mole Scalopus aquaticus

15. Southern short-tailed shrew Blarina carolinensis

16. Discussion: Slime Molds
PQ Questions
Slime Molds: Crespi paper
If cooperation represents the “core of sociality,” are microorganisms “social?”
What is altruism? Does it advance fitness? Inclusive fitness?
Hamilton’s rule: Help can be given if RgB – C > 0
If not?
If Rg is low?
If B is low?
High incidence of high Rg in haplodiploid systems (many bees and wasps)

17. Discussion: Wbirds
#1: Hypothesis in an “If X happens, then we can expect to see Y.” Let X be the definition of your dependent variable. (hint: inter/intra)
#6: Is color brightness important to other males, to females, or to both?
#7: If X, then Y.
#9: similar to #6
#11: ??

18. Discussion: Ch 13 Competition is essential for selection.
If resources are limiting, we expect some individuals to be better at getting available resources than others.
What happens to the individuals that are better at getting resources?

19. Ch 13: Competition Operates at two levels:
Intraspecific competition.
Interspecific competition.
Which do you think is more important?

20. Eco-?
Once again, we can see that foundations of ecology have borrowed heavily from principles of economics
Consider Burger King vs McDonalds.
Do they compete?
For what?
Are their “niches” the same?

21. Eco-?
Once again, we can see that foundations of ecology have borrowed heavily from principles of business
Consider Burger King vs McDonalds.
Do they compete?
For what?
Are their “niches” the same?
Consider a third fast food restaurant

22. How to “win?” (at business or biology)
“Find a need and fill it.”
Henry Kaiser, entrepreneur
So, if you were going to open a fast food restaurant, what would you do?
Mimic a successful formula?
Try something different?

23. Classic competition experiment, Georgy Gause
Two spp of Paramecium, grown separately,

24. Paramecium
BUT, when grown together,

25. Competitive Exclusion principle
“No two species can occupy the same niche at the same time.”
Obvs, this only works if Resources Are Limited
Next up, models (L-V) of how these principles overlap to predict dynamics. Stay tuned!

26. Lab 10B: Competition
Start with HALF the number of seeds instructed for all pots and all treatments
In one week from today (4.21), thin to max final # (rows 3 and 5 of table)