But the good news is that a smaller population of seals on the main Hawaiian islands is growing and thriving, he said.

但他同时补充道，夏威夷本岛上生存的少量海豹群体正在兴旺壮大，这是个好消息。

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"In the 1800s people had to use natural fertilizers such as guano, " which is the excrement of birds, bats, and seals, Litaker said.

“19世纪人类只有自然化肥可以使用，例如动物粪便，”Litaker说，也就是鸟类、鼠类和海豹的排泄物。

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Walters said that in the isolated northwest Hawaiian islands, the number of monk seals is declining by four percent every year.

沃尔特斯表示，在夏威夷西北部孤立的海岛，僧海豹数量每年都在减少4%。

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Payne said technicians found that seals on the hydrogen vent lines were out of alignment and they installed new ones to fix the leaks.

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They have widened the mesh on their nets and provided escape hatches for fish, around which hungry seals are said to loiter.

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An RSPCA spokesman said seals sometimes swim upriver following fish when there are peak high tides.

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