11.   The real issue is how eggs and young lungfish, which keep such populations going, will fare once the weir is built.

12.   They also worry that the state will rush prisoners through treatment to keep prison populations from expanding too far beyond capacity.

13.   To keep the population in check, they allow several trappers to capture the animals.

14.   To test the idea that white-footed mice keep gypsy moth populations in check, researchers at Millbrook counted the numbers of each in successive years.

15.   What keeps population now growing is mainly longer life.

16.   Norway says minke whales and seals eat fish needed by humans and that hunts keep seal populations in check.

17.   The fact that the air temperature had not increased had kept the population from panicking, they said.

18.   Wolves are flourishing in Siberia, and authorities have hugely increased bounties for hunters to keep their population in check, a report said Wednesday.

19.   In addition to the hobby aspect, the hunt also serves to keep the population in check.

20.   The Wildlife Services use the winter snows to track and kill the coyotes to keep the population under control.