Estimates of overall density and total number of walruses in herds hauled out on the northwest coast of Alaska in fall of 2011.
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资源简介：
1Total number of 10 m×10 m grid cells required to cover the herd. Estimates are based on a random sample of 20 of these cells from each herd on each day. 2Walruses/m2.
创建时间：
2013-07-31
