(Quick Quiz Questions)
Heath, D.D. et al. Rapid evolution of egg size in captive salmon. Science 299:1738.
1. Why is a simple observation of phenotypic differences between captive and wild-bred individuals inadequate to infer evolutionary change?
2. What are the critical pieces of information one could gather that would document evolutionary change?
3. In what ways could the management practices studied here alter the pattern of selection on the fundamental tradeoff between size and number of offspring?
4. How do these researchers know that the changes that they observed are not simply environmental effects?
5. In your opinion, what is the most compelling evidence that changes in selection induced by humans impacts native populations?