11.   The researchers suggest as well that it may not be the year-to-year changes in total ice area that affect krill populations.

12.   They are not only distinct, but they also seem to be affecting the population of wild salmon.

13.   To be sure, predicting how sentencing laws will affect inmate populations is a tricky business.

14.   And salting has never affected the population.

15.   Fueling the debate, the United States on Wednesday presented a report saying global warming could affect populations of krill and other foods eaten by whales.

16.   Khalilzad emphasized that the United States was sensitive to concerns about how the bombardment was affecting the population.

17.   Officials were still assessing how the spill would affect bird populations north of Dassen, Kleinschmidt said.

18.   The highly contagious, usually fatal, disease has affected hog populations throughout Europe in recent years.

19.   The report did not say whether the chemical had spread into the river or affected the population.

20.   USDA scientists are now studying the area to see how the flies have affected ant populations.