Curtis M. Lively & Mark F. Dybdahl. 2000.
Parasite adaptation to locally common host genotypes. Nature
1. What are the possible explanations for observation that common genotypes this snail were more susceptible to infection by the trematode than the rare genotypes?
2. How does the use of sympatric and allopatric populations of the snails test the authorís hypothesis?
3. How does the use of distinct and mixed populations of the trematode test the authorís hypothesis?
4. Why do the authors conclude that the Red Queen hypothesis supported?