结果,饥饿的雌性驯鹿就会流产或者诞下体重较轻的小鹿。
The average mass of an adult reindeer in 1994, when the survey began, was 55kg, but by 2010 it had dropped to 48kg.
1994年调查开始时,一头成年驯鹿的平均体重为55公斤,但是到2010年,成年驯鹿的平均体重已经下降到48公斤。
Professor Steve Albon, an ecologist at the James Hatton Institute in Aberdeen, said that, because the mammals have a relatively high surface-area-to-volume ratio, they are no particularly energy efficient.
史蒂夫•阿尔博教授是阿伯丁詹姆士赫顿研究院的生态学家。他表示,这种哺乳动物的表面积体积比相对较高,他们没有特殊的节能功能。
Reindeer can often access the meagre food sources beneath the snow by clearing it away with their antlers, but they cannot break through the hard ice.
驯鹿通常用鹿角清除积雪,获得下面寥寥无几的食物,但他们无法弄破坚冰。
Without access to the food in winter, calves are being born far lighter than they should be.
雌性驯鹿冬天吃不到食物,生下来的小鹿就比应有的体重轻得多。
Numbers of reindeer have also soared in the past 20 years, meaning that those which are born are facing greater competition for food.
驯鹿的数量在过去的20年里飙升,这意味着生下来的小鹿面临着更加激烈的食物竞争。
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