For management purposes, Cuvier's beaked whales inhabiting U.S. waters have been divided into five stocks: the Alaska Stock, the California/Oregon/Washington stock, the Hawaiian stock, the Northern Gulf of Mexico stock and the Western North Atlantic stock. Reliable abundance estimates are unavailable for the Alaska stock. The estimated population of the Hawaiian stock is 7,000-13,000, the California/Oregon/Washington stock is 1,100-1,900, and the northern Gulf of Mexico stock is 65-95 animals. In the Western North Atlantic, the abundance estimate for undifferentiated beaked whales, which includes Cuvier's beaked whales, is 2,100-3,500 animals. Beaked whales are often lumped together in stock estimates due to their cryptic nature and difficulty of sighting and identifying them at sea. Estimates do not include a correction factor for submerged animals (with long dive times), which may be substantial and underestimate actual abundance. The Northern Gulf of Mexico and Western North Atlantic stocks are considered "strategic" because of uncertainty regarding stock size and evidence of human induced mortality and serious injury associated with acoustic activities. Other abundance estimates for Cuvier's beaked whales includes 20,000 in the eastern tropical Pacific and 90,000 in the eastern North Pacific. There are insufficient data to determine the population trends for this species.
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