监狱人口增长了9%。

There has been a 9% rise in the prison ___population.

海豚种群受到金枪鱼捕捞的严重影响。

The dolphin ___population has been seriously affected by tuna fishing.

由于栖息地丧失，老虎种群正在减少。

The tiger ___population is decreasing due to habitat loss.