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Distribution and abundance of beaked whales (Family Ziphiidae) off Cape Hatteras, North Carolina, U.S.A.

Research output: Contribution to journalArticle

DOI

Open Access Status

  • Embargoed (until 30/03/19)

Author(s)

William A. McLellan, Ryan J. McAlarney, Erin W. Cummings, Andrew J. Read, Charles G. M. Paxton, Joel T. Bell, D. Ann Pabst

School/Research organisations

Abstract

Beaked whales are vulnerable to the impacts of disturbance from several sources of anthropogenic sound. Here we report the distribution and abundance of beaked whales off Cape Hatteras, North Carolina, USA, an area utilized by the U.S. Navy for training exercises, and of particular interest for seismic geophysical surveys. From May 2011 through November 2015, monthly aerial surveys were conducted at the site. Beaked whales were encountered 74 times (n= 205 individuals) during these surveys. Ziphius cavirostris, the most commonly encountered species, was observed in every month of the year. Mesoplodon spp. were encountered in ten months of the year. Photographs of adult males with erupted teeth permitted six sightings to be identified conclusively as M. europaeus; M. mirus was also photographed just outside the study area. Beaked whale surface densities stratified by depth (0.005 – 0.007/km2) were among the highest reported in the world for small ziphiids. A quantitative comparison of sightings and stranding records suggests that strandings do not accurately reflect the relative abundance of beaked whale species in this area. We conclude that Cape Hatteras, at the convergence of the Labrador Current and Gulf Stream, is a particularly important year-round habitat for several species of beaked whales.
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Details

Original languageEnglish
JournalMarine Mammal Science
VolumeEarly View
Early online date30 Mar 2018
DOIs
StateE-pub ahead of print - 30 Mar 2018

    Research areas

  • Beaked whales, Cape Hatteras, Ziphius cavirostris, Mesoplodon-europeus, Mesplodon mirus, Densities, Strandings

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