All told, the numbers of sperm whales and other whales that rely upon plankton rather than fish have declined by roughly 30% per their kingdom.

• 总计，依赖浮游生物的抹香鲸和其它鲸鱼的王国比依赖鱼类为生的鲸鱼王国减少了大约30%25的成员数量。