Problem
Buffleheads are small diving ducks that primarily eat aquatic invertebrates. Buffleheads that spend more time underwater are able to forage for more food.
In one generation, suppose there are limited food resources so that only ducks who dive on average 16 seconds survive to reproduce in population with an average 9 second dive time. If the heritability of dive length in bufflehead ducks is 0.2, what should we expect the average dive time of the next generation to be?