If you build a canal linking a predator-rich pond to a predator-poor pond,then what type of selection should subsequently be most expected among the mosquitofish in the original predator-rich pond,and what type should be most expected among the mosquitofish in the formerly predator-poor pond?
A)stabilizing selection;directional selection
B)stabilizing selection;stabilizing selection
C)less-intense directional selection;more-intense directional selection
D)less-intense disruptive selection;more-intense disruptive selection

Question

Quizplus · Accepted Answer

Mosquitofish in the predator-rich pond are likely to have undergone intense directional selection for traits that aid in predator avoidance or defense. However, once the canal is built and the predator-poor pond is connected, the selection pressure for these traits may decrease as the fish no longer face predators as frequently. Therefore, we might expect to see less-intense directional selection among mosquitofish in the original predator-rich pond. Meanwhile, mosquitofish in the newly connected predator-poor pond may undergo more-intense directional selection for traits that aid in exploiting new resources or competing with other fish in the pond, resulting in more-intense directional selection.

If You Build a Canal Linking a Predator-Rich Pond to a Predator-Poor