Ground, vessel, and photographic Northern Elephant Seal counts collected on the Pacific coast of North America from 1981 to 2023 (NCEI Accession 0307611)
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下载链接：
https://www.ncei.noaa.gov/archive/accession/0307611
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资源简介：
Ground, vessel, and aerial counts of northern elephant seals at breeding sites in California and the California Channel Islands. Aerial surveys were conducted at 800-1400ft above ground level (AGL) with either film or digital camera and analyzed post survey by creating mosaics and counting individuals with 1-3 observers. Counts for northern elephant seals are collated into one CSV.
提供机构：
NOAA National Centers for Environmental Information
创建时间：
2025-09-09
