Up to 20 percent of the atlantic herd usually nests on thick ice floes in the southern gulf region in february or march 在那些生活于大西洋水域的海豹群体里，选择在圣劳伦斯海湾地区的大块厚浮冰上筑窝产崽者所占的比例高达20 。
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Up to 20 percent of the atlantic herd usually nests on thick ice floes in the southern gulf region in february or march . but this year authorities and animal rights groups found only slush and ice fragments too small to support a newborn pup 在那些生活于大西洋水域的海豹群体里，选择在圣劳伦斯海湾地区的大块厚浮冰上筑窝产崽者所占的比例高达20 。
