1.   Top predators, such as toothed whales and dolphins, can accumulate large quantities in their tissues if they keep eating contaminated prey.

2.   As a top predator, tigers need a great deal of forest.

3.   As top predators, the impact of their hunting on many species rippled through pre-Columbian ecosystems.

4.   Biologists have found that life is dangerous for the adult anacondas too, even though they are the top predators.

5.   Consider Scotland, whose top predator, the wolf, was hunted to extinction several hundred years ago.

6.   If there is one good measure of the health of any ecosystem, it is the top predator.

7.   It was the top predator on Earth hundreds of millions of years before Tyrannosaurus Rex and so horribly ugly it almost makes you happy for mass extinctions.

8.   Many fossils of top predators such as Utahraptor or Tyrannosaurus rex show multiple broken and healed bones and signs of serious infections.

9.   Now modern ecologists will have an uncommon chance to observe in detail the difference made by the presence or absence of a top predator like the wolf.

10.   On level four are top predators like sharks, tuna, and swordfish.