Polar Biology

, Volume 31, Issue 12, pp 1461–1468 | Cite as

Satellite tracking reveals distinct movement patterns for Type B and Type C killer whales in the southern Ross Sea, Antarctica

  • Russel D. Andrews
  • Robert L. Pitman
  • Lisa T. Ballance
Original Paper

Abstract

During January/February 2006, we satellite-tracked two different ecotypes of killer whales (Orcinus orca) in McMurdo Sound, Ross Sea, Antarctica, using surface-mounted tags attached with sub-dermal darts. A single Type B whale (pinniped prey specialist), tracked for 27 days, traveled an average net distance of 56.8 ± 32.8 km day−1, a maximum of 114 km day−1, and covered an estimated area of 49,351 km2. It spent several days near two large emperor penguin (Aptenodytes forsteri) colonies, a potential prey item for this form. By contrast, four Type C killer whales (fish prey specialists) tracked for 7–65 days, traveled an average net distance of 20 ± 8.3 km day−1, a maximum of 56 net km day−1, and covered an estimated area of only 5,223 km2. These movement patterns are consistent with those of killer whale ecotypes in the eastern North Pacific where mammal-eating ‘transients’ travel widely and are less predictable in their movements, and fish-eating ‘residents’ have a more localized distribution and more predictable occurrence, at least during the summer months.

Keywords

Antarctica Killer whale Ecotype Ross Sea Satellite tracking 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Russel D. Andrews
    • 1
  • Robert L. Pitman
    • 2
  • Lisa T. Ballance
    • 2
  1. 1.University of Alaska Fairbanks School of Fisheries and Ocean Sciences, and the Alaska SeaLife CenterSewardUSA
  2. 2.NOAA Fisheries, Southwest Fisheries Science CenterLa JollaUSA

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