Survey data summary.
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https://figshare.com/articles/dataset/_Survey_data_summary_/177609
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资源简介：
Number of beaked whale groups detected, and total km of survey effort (Lt) in each year of cetacean line-transect surveys. Only whale groups <4 km from the transect line, and only survey effort during Beaufort sea state ≤5 are included.
*Effort in these years are from three survey strata only (i.e., Oregon-Washington stratum not surveyed in these years).
创建时间：
2013-01-16
