scholarly journals High-frequency modulated signals of killer whales (Orcinus orca) in the North Pacific

2012 ◽  
Vol 131 (4) ◽  
pp. EL295-EL301 ◽  
Author(s):  
Anne E. Simonis ◽  
Simone Baumann-Pickering ◽  
Erin Oleson ◽  
Mariana L. Melcón ◽  
Martin Gassmann ◽  
...  
Keyword(s):  
North Pacific ◽  
High Frequency ◽  
Orcinus Orca ◽  
Killer Whales ◽  
The North ◽  
Modulated Signals ◽  
The North Pacific

High-frequency modulated signals of killer whales (Orcinus orca) in the North Pacific

2011 ◽  
Vol 130 (4) ◽  
pp. 2322-2322
Author(s):  
Anne E. Simonis ◽  
Simone Baumann-Pickering ◽  
Erin Oleson ◽  
Mariana L. Melcón ◽  
Martin Gassmann ◽  
...  
Keyword(s):  
North Pacific ◽  
High Frequency ◽  
Orcinus Orca ◽  
Killer Whales ◽  
The North ◽  
Modulated Signals ◽  
The North Pacific

Preliminary findings of restriction fragment differences in mitochondrial DNA among killer whales (Orcinus orca)

1989 ◽  
Vol 67 (10) ◽  
pp. 2592-2595 ◽  
Author(s):  
Tracy A. Stevens ◽  
Deborah A. Duffield ◽  
Edward D. Asper ◽  
K. Gilbey Hewlett ◽  
Al Bolz ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
North Atlantic ◽  
North Pacific ◽  
Killer Whale ◽  
Vancouver Island ◽  
Restriction Pattern ◽  
Orcinus Orca ◽  
Killer Whales ◽  
The North ◽  
The North Pacific

A preliminary assessment of mitochondrial DNA restriction patterns in the killer whale (Orcinus orca) was conducted using 10 captive North Atlantic killer whales from the southeastern coast of Iceland, a captive-born offspring of one of these whales, and 9 North Pacific killer whales. No restriction pattern variation was seen among these whales, using the enzymes BamH I, Bgl II, Hinf I, Kpn I, or Pvu II. Restriction pattern variation was found using the enzyme Hae III. This restriction endonuclease distinguished the North Atlantic killer whales (type 1) from the North Pacific killer whales. The North Pacific killer whales were further differentiated into two groups: those originating from the "resident" communities of the Vancouver Island region (type 2), and those from the "transient" community of Vancouver Island, as well as those stranded along the Oregon coast (type 3). The observed Hae III restriction pattern differences suggest that mitochondrial DNA analysis will be a valuable technique for investigating regional and local distributions of maternal lineages among killer whale pods, especially in the North Pacific.

Ultrasonic whistles of killer whales (Orcinus orca) recorded in the North Pacific (L)

2012 ◽  
Vol 132 (6) ◽  
pp. 3618-3621 ◽  
Author(s):  
Olga A. Filatova ◽  
John K. B. Ford ◽  
Craig O. Matkin ◽  
Lance G. Barrett-Lennard ◽  
Alexander M. Burdin ◽  
...  
Keyword(s):  
North Pacific ◽  
Orcinus Orca ◽  
Killer Whales ◽  
The North ◽  
The North Pacific

scholarly journals KILLER WHALES AND MARINE MAMMAL TRENDS IN THE NORTH PACIFIC—A RE-EXAMINATION OF EVIDENCE FOR SEQUENTIAL MEGAFAUNA COLLAPSE AND THE PREY-SWITCHING HYPOTHESIS

2007 ◽  
Vol 23 (4) ◽  
pp. 766-802 ◽  
Author(s):  
Paul R. Wade ◽  
Vladimir N. Burkanov ◽  
Marilyn E. Dahlheim ◽  
Nancy A. Friday ◽  
Lowell W. Fritz ◽  
...  
Keyword(s):  
Marine Mammal ◽  
North Pacific ◽  
Killer Whales ◽  
Prey Switching ◽  
The North ◽  
The North Pacific

High frequency of occurrence of anthropogenic debris ingestion by sea turtles in the North Pacific Ocean

2015 ◽  
Vol 162 (10) ◽  
pp. 2079-2091 ◽  
Author(s):  
Kathryn R. Wedemeyer-Strombel ◽  
George H. Balazs ◽  
James B. Johnson ◽  
Taylor D. Peterson ◽  
Mary K. Wicksten ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
High Frequency ◽  
Sea Turtles ◽  
North Pacific Ocean ◽  
Frequency Of Occurrence ◽  
The North ◽  
The North Pacific

Mammal-eating killer whales, industrial whaling, and the sequential megafaunal collapse in the North Pacific Ocean: A reply to critics of Springer et al. 2003

2008 ◽  
Vol 24 (2) ◽  
pp. 414-442 ◽  
Author(s):  
A. M. Springer ◽  
J. A. Estes ◽  
G. B. van Vliet ◽  
T. M. Williams ◽  
D. F. Doak ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Killer Whales ◽  
The North ◽  
The North Pacific

The Forced and Intrinsic Low-Frequency Modes in the North Pacific*

2005 ◽  
Vol 18 (6) ◽  
pp. 876-885 ◽  
Author(s):  
Soon-Il An ◽  
Bin Wang
Keyword(s):  
North Pacific ◽  
Time Scale ◽  
High Frequency ◽  
Geopotential Height ◽  
Interannual Time Scale ◽  
Coupled Mode ◽  
The North ◽  
Expansion Coefficients ◽  
The North Pacific ◽  
Sst Anomalies

Abstract Conditional maximum covariance analysis is applied to investigate the coherent patterns between the tropical and North Pacific SST and the North Pacific 500-hPa geopotential height anomalies. Two leading modes are identified. One is an intrinsic midlatitude mode, the North Pacific (NP) mode, for which SST anomalies are mainly confined to the extratropical North Pacific. The other is a tropical ocean–atmosphere coupled mode, the ENSO mode, in which an ENSO-like SST pattern dominates the Tropics but extratropical SST anomalies are relatively weak. The NP and ENSO modes exhibit distinct spatial and temporal characteristics. For the NP mode, atmospheric variation leads to changes in SST, while for the ENSO mode the opposite is true. The NP mode displays a persistence barrier during August–September whereas the ENSO mode has a March–April persistence barrier. The upper-tropospheric jet stream associated with the NP and ENSO mode intensifies, respectively, over the central North Pacific and the subtropical northeastern Pacific; consequently, the transient activities maximize in their corresponding jet exit regions. The expansion coefficients of the 500-hPa geopotential height associated with the two modes appear to be significantly correlated. However, by reducing the high-frequency part (e.g., shorter than the interannual time scale) in expansion coefficients, the correlation becomes insignificant, indicating that the significant correlation results from high-frequency signals that are unrelated to the corresponding SST variation. The results presented here suggest that the intrinsic coupled mode in the midlatitude North Pacific may be distinguished from the forced mode by remote ENSO, especially on the interannual time scale.

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