Sea cows were totally dependent on kelp for food, and within a decade of the onset of otter hunting, Steller noted that the islands' sea cows appeared malnourished.
海牛完全以海藻为食，在捕猎水獭开始的十年里，斯特勒注意到，岛上的海牛似乎营养不良。
2
However, by 1750, hunters had also targeted nearby seaotter populations.
然而，到了1750年，猎人们也开始瞄准附近的海獭种群。
3
Back in the 1970s, most experts thought the southern seaotter population would expand at a swift clip of nearly 20% per year like those in Alaska.