90%幼崽活不过一年？加拿大灰海豹的命运因这项黑科技改变！
尽管塞布尔岛的灰海豹数量在过去几十年里大幅增加，但约90%的幼崽在第一年就会死亡。科学家认为，食物竞争加剧可能是导致高死亡率的原因之一，因此监测这一种群对它们的保护至关重要。马萨诸塞州伍兹霍尔海洋研究所（WHOI）及其合作团队在过去几个冬天对灰海豹进行了研究，而今年，他们首次将目光聚焦在幼崽的心脏上。
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