MESOPLODONT BEAKED WHALES (Mesoplodon spp.): California/Oregon/Washington Stocks
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چکیده
Figure 1. Mesoplodon beaked whale sightings based on aerial and shipboard surveys off California, Oregon and Washington, 1975-1994. Key: F = Mesoplodon sp.; + = Mesoplodon carlhubbsi; × = Mesoplodon densirostris (see Appendix 2 in Barlow et al. 1997 Appendix 2 for data sources and information on timing and location of survey effort). Dashed line represents the U.S. EEZ, thick line indicates the outer boundary of all surveys combined. Revised 12/15/98
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MESOPLODONT BEAKED WHALES (Mesoplodon spp.): Western North Atlantic Stock
STOCK DEFINITION AND GEOGRAPHIC RANGE Within the genus Mesoplodon, there are four species of beaked whales that reside in the northwest Atlantic. These include True's beaked whale, Mesoplodon mirus; Gervais' beaked whale, M. europaeus; Blainville's beaked whale, M. densirostris; and Sowerby's beaked whale, M. bidens. These species are difficult to identify to the species level at sea; therefore...
متن کاملMESOPLODON BEAKED WHALES (Mesoplodon spp.): Western North Atlantic Stock
STOCK DEFINITION AND GEOGRAPHIC RANGE Within the genus Mesoplodon, there are four species of beaked whales that reside in the northwest Atlantic. These include True's beaked whale, Mesoplodon mirus; Gervais' beaked whale, M. europaeus; Blainville's beaked whale, M. densirostris; and Sowerby's beaked whale, M. bidens (Mead 1989). These species are difficult to identify to the species level at se...
متن کاملMESOPLODON BEAKED WHALES (Mesoplodon spp.): Western North Atlantic Stock
STOCK DEFINITION AND GEOGRAPHIC RANGE Within the genus Mesoplodon, there are four species of beaked whales that reside in the northwest Atlantic. These include True's beaked whale, Mesoplodon mirus; Gervais' beaked whale, M. europaeus; Blainville's beaked whale, M. densirostris; and Sowerby's beaked whale, M. bidens. These species are difficult to identify to the species level at sea; therefore...
متن کاملMESOPLODON BEAKED WHALES (Mesoplodon spp.): Western North Atlantic Stock
STOCK DEFINITION AND GEOGRAPHIC RANGE Within the genus Mesoplodon, there are four species of beaked whales that reside in the northwest Atlantic. These include True's beaked whale, Mesoplodon mirus; Gervais' beaked whale, M. europaeus; Blainville's beaked whale, M. densirostris; and Sowerby's beaked whale, M. bidens. These species are difficult to identify to the species level at sea; therefore...
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Observations of killer whales (Orcinus orca) feeding on the remains of beaked whales have been previously documented; however, to date, there has been no published account of killer whales actively preying upon beaked whales. This article describes the first field observations of killer whales interacting with, hunting and preying upon beaked whales (Mesoplodon spp.) on four separate occasions ...
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