1 - 1000 individuals
Comments: Current population abundance is estimated at 2,540 individuals throughout the range (Hobday and Tegner in U.S. Fish and Wildlife Service 2000). In October of 1999 a survey near Santa Cruz, Anacapa, Santa Barbara, San Clemente and Santa Catalina Islands, and on Osborn, Farnsworth, Tanner and Cortez Banks found an average density of 0.00027 white abalone per square meter (U.S. Fish and Wildlife Service 2000). Surveys were conducted by Davis et al. (1996) in the vicinity of the Channel Islands in 1980-1981 and 1992-1993. In 1980-81 they found a mean density of 0.0021 per square meter over 10,000 square meters of suitable habitat; in 1992-93 they found a mean density of 0.0002 per square meter over 30,600 square meters of suitable habitat (i.e., 3 adults over 3 ha of suitable habitat). The equivalent search in the 1970's would have revealed an average density of 6,120-30,600 adults (Davis et al. 1996). No population estimates are available before commercial exploitation began in 1965.
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