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Report of the Joint Marine Mammal Commission -- National Marine Fisheries Service Passive Acoustic Surveying Workshop

Dennis HeinemannJason GedamkeErin Marie OlesonJay BarlowJessica L. CranceMarla M. HoltMelissa S. SoldevillaSofie M. Van Parijs

出版	U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 2016
URL	http://books.google.com.hk/books?id=dtfjnQAACAAJ&hl=&source=gbs_api

註釋

"The National Marine Fisheries Service (NMFS) is responsible for gathering the information needed to support its stock assessments of marine mammals. The distribution and abundance of each stock is the core of those assessments. Data to support stock assessments are traditionally gathered by conducting visual observations during shipboard and/or aerial surveys. Increasingly, however, the agency is having difficulty provide abundance estimates and other data needed for marine mammal stock assessments. These challenges have spurred NMFS to increase its investment in alternative monitoring methods that may fill some critical data gaps more effectively and efficiently than large-scale ship and aerial surveys alone"--Introduction