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A Plague of Frogs--Study Questions to accompany the book.
CHAPTER 11: Bad Weather
1. Most of the reports of deformed frogs came from the northern part of the country. What did this suggest?
2. What are Stan Sessions’ two contentions about the cause of the deformations?
3. Why was the predator factor not considered a main cause of the deformities?
4. Describe Mike Lannoo’s work at Okobuji.
5. Give 2 reasons Lannoo discredited the predator theory.
6. What is the common name for Ambystoma tigrinum?
7. What was David Merrell’s contribution to the investigation?
8. Explain the significance of the journal article “Natural Selection in a Leopard Frog Population”.
9. Why did Hoppe and the Mottls study the preserved frog collection at the University of Minnesota?
10. Why did Judy Helgen put a ban on disseminating information about the investigation?
11. How many frogs from the CWB were deformed on this outing? What breed of frog were they?
12. What type of deformity would an LR CUT frog have?
13. What % of frogs were deformed in the 3rd season at CWB? How does that compare to the 2nd season?
14. Why was Dennis Bock unhappy with the state and federal agencies?
15. What was the designated control site for CWB?
16. Explain why it is important to have a control site for CWB.
17. Describe the breeding adaptations that frogs in Minnesota exhibit.
18. Why did the declining numbers of frogs at CWB concern Hoppe?
19. Why did Hoppe take such extreme measures to return all collected frogs to CWB?
20. Explain the significance of Hoppe’s “eggs in a cage” experiment.
21. Identify Andy Blaustein. (Where did he get his education, etc.)
22. What is the scientific name for Cascade frogs? Western toads?
23. What is the usual mortality rate of Western toads?
24. What did Blaustein think might be the cause of the deformities after his experiments?
25. What did he think that was the cause?
26. Explain the function of photolyase.
27. What is the difficulty is calculating UV penetration changes?
28. What was Blaustein’s basic conclusion about ecological interactions?
29. What types of damage did UV cause in frogs?
30. Why was Saprolegnia ferax able to infect frogs now and not in the past?
31. Why might some species in the pond have a robust photolyase response while others do not?
32. What did Blaustein find in Hyla regilla?
33. Explain Blaustein’s view on the parasite causation theory.
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