After gulls switched their focus from southern right whale mothers to calves, scientists recorded a drop in calf survival.

中文翻译：

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小鲸鱼在鸟类攻击下枯萎

在海鸥将注意力从南露脊鲸母亲转移到小鲸鱼后，科学家记录到小鲸鱼存活率下降。