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Sea Otter Surveys of Izembek Lagoon, Alaska

其他書名	A Pilot Study
出版	U.S. Fish and Wildlife Service, Marine Mammals Management, 1999
URL	http://books.google.com.hk/books?id=7Nm2GwAACAAJ&hl=&source=gbs_api

註釋"Our objective was to test an easily implemented aerial survey protocol for estuarine and near shore marine waters adjacent to Izembek National Wildlife Refuge ... This survey resulted in an abundance estimate of 615 ... in Izembek Lagoon during August, 1999"--Page 1.