For management purposes, Blainville's beaked whales inhabiting U.S. waters have been divided into three stocks: the Hawaiian stock, the Northern Gulf of Mexico stock, and Western North Atlantic stock. The estimated number of animals in the Hawaiian Stock is 1,200-2,200, the Northern Gulf of Mexico is about 100 animals (for Mesoplodon spp.), and there is no current estimate for the Western North Atlantic Stock (350-600 total unidentified beaked whales). The Northern Gulf of Mexico and Western North Atlantic stocks are considered "strategic" because of uncertainty regarding stock size and evidence of fishery-related mortality and serious injury. There are insufficient data to determine the population trends for this species, but they are probably not rare because estimates do not include a correction factor for submerged animals (with long dive times) which may be substantial and underestimate actual abundance.
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