Nhận biết (M1)

Optimal foraging theory (OFT) proposes that how animals forage reflects cost-benefit trade-offs that shift from species to species and with changing ecological conditions. One such condition is lunar intensity: Nathan Upham and John Hafner reported it negatively linked to foraging by the desert kangaroo rat, whereas Eduardo Fernández-Duque and colleagues reported it positively linked to foraging by Azara’s night monkeys. OFT accounts for the gap—because the monkeys depend more heavily on sight, a brighter moon helps them more than it helps the kangaroo rats.

According to the text, the difference between Upham and Hafner’s findings and Fernández-Duque and colleagues’ findings can be attributed to which difference between desert kangaroo rats and Azara’s night monkeys?

• A.

  The kangaroo rats cut back their foraging as lunar intensity rises, while the monkeys forage more.

• B.

  The kangaroo rats face more danger from predators than the monkeys do.

• C.

  The kangaroo rats depend on sight less than the monkeys do.

• D.

  The kangaroo rats run into lunar-intensity levels unlike those the monkeys meet.