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In the Antarctic, orcas range up to the edge of the pack ice and are believed to venture into the denser pack ice, finding open leads much like beluga whales in the Arctic. However, orcas are merely seasonal visitors to Arctic waters, and do not approach the pack ice in the summer.
Northern resident orcas, also known as northern resident killer whales (NRKW), are one of four separate, non-interbreeding communities of the exclusively fish-eating ecotype of orca in the northeast portion of the North Pacific Ocean.
The primary diet of transient orcas includes harbor seals, Steller sea lions, harbor porpoises, Dall's porpoises, Pacific white-sided dolphins, and Minke whales. Among these, the harbor seal is the most common prey; one survey estimated that more than half of the diet of transients in the Salish Sea region consists of harbor seals. [ 16 ]
Contaminants from the industrialised world have made their way to the Arctic marine food web. This poses a health risk to people who eat "country food" ( traditional Inuit foodstuffs ). [ 17 ] As whales grow, mercury accumulates in the liver, kidney, muscle, and blubber, and cadmium settles in the blubber, [ 18 ] the same process that makes ...
Drone videos of gray whales off Oregon have revealed new details about how the marine mammals find food. The findings were described in studies this summer. Drone video of gray whales offers new ...
In recent years Japan has resumed taking North Pacific fin whale and sei whales in their research whaling. The fin whales are highly desired because they yield arguably the best quality of tail meat (onomi). [14] Japanese research vessels refer to the harvested whale meat as incidental byproducts which have resulted from study.
Tracking the Humboldt Current orcas and knowing what the killer whales are hunting and eating will help conservation groups protect the orcas, which are described as “data deficient” by the ...
Type A or Antarctic orcas look like a "typical" orca, a large, black-and-white form with a medium-sized white eye patch, living in open water and feeding mostly on minke whales. [ 2 ] [ 4 ] Type B1 or pack ice orcas are smaller than type A. [ 4 ] It has a large white eye patch.