An Observation regarding Gray Whales and Killer Whales

1964 ◽  
Vol 67 (3) ◽  
pp. 550 ◽  
Author(s):  
Bryan R. Burrage
Keyword(s):  
1994 ◽  
Vol 72 (8) ◽  
pp. 1528-1530 ◽  
Author(s):  
P. Dawn Goley ◽  
Janice M. Straley

A group of at least 17 killer whales (Orcinus orca) were observed attacking a gray whale (Eschrichtius robustus) mother and calf on 2 May 1992 in Monterey Bay, California, U.S.A. (36°47.90′N, 122°00.17′W). Small groups of killer whales took turns harassing the gray whales and prevented them from leaving the area. Three of the killer whales participating in this attack previously had been photographed on 6 August 1989 in Glacier Bay, Alaska, U.S.A. (58°41′N, 136°04′W). This linear distance nearly doubles the maximum range of movement previously reported for killer whales.


2011 ◽  
Vol 421 ◽  
pp. 229-241 ◽  
Author(s):  
LG Barrett-Lennard ◽  
CO Matkin ◽  
JW Durban ◽  
EL Saulitis ◽  
D Ellifrit

2019 ◽  
Vol 133 (2) ◽  
pp. 252-261 ◽  
Author(s):  
Yulán Úbeda ◽  
Sara Ortín ◽  
Judy St. Leger ◽  
Miquel Llorente ◽  
Javier Almunia

2018 ◽  
Vol 44 (6) ◽  
pp. 643-652
Author(s):  
David W. Weller ◽  
Amanda L. Bradford ◽  
Aimée R. Lang ◽  
Alexander M. Burdin ◽  
Robert L. Brownell, Jr.

2015 ◽  
Vol 8 ◽  
Author(s):  
A. Mel Cosentino

Orcinus orcais a cosmopolitan species and the most widely distributed marine mammal. Its diet includes over 140 species of fish, cephalopods, sea birds and marine mammals. However, many populations are specialised on certain specific prey items. Three genetically distinct populations have been described in the North Atlantic. Population A (that includes the Icelandic and Norwegian sub-populations) is believed to be piscivorous, as is population C, which includes fish-eating killer whales from the Strait of Gibraltar. In contrast, population B feeds on both fish and marine mammals. Norwegian killer whales follow the Norwegian spring spawning herring stock. The only description in the literature of Norwegian killer whales feeding on another cetacean species is a predation event on northern bottlenose whales in 1968. Daily land-based surveys targeting sperm whales were conducted from the Andenes lighthouse using BigEyes®binoculars (25×, 80 mm). The location of animals at sea was approximated through the use of an internal reticule system and a graduated wheel. On 24 June 2012 at 3:12 am, an opportunistic sighting of 11 killer whales was made off Andenes harbour. The whales hunted and fed on a harbour porpoise. Despite these species having overlapping distributions in Norwegian waters, this is the first predatory event reported in the literature.


Ecosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
Author(s):  
Joshua D. Stewart ◽  
John W. Durban ◽  
Holly Fearnbach ◽  
Lance G. Barrett‐Lennard ◽  
Paige K. Casler ◽  
...  

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