After that point, mammals were the dominant land living creature.

在那以后，哺乳动物是陆地上的统治性生物。

The United States had also claimed the island by 1853;  by 1859, there were between twenty and thirty American settlers on the land, living on farms  in prime sheep grazing land.

1853 年，美国也宣布对该岛拥有主权。到 1859 年，这片土地上已有 20 至 30 名美国定居者，他们生活在优质羊牧场的农场里。