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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 ]
Download as PDF; Printable version; ... Transient orcas near Unimak Island, ... 5.4 meter (18 foot) female killer whale compared to 1.8 meter (5 foot 11 inches) human ...
Over 2,000 individual resident-like orcas and 130 transient-like orcas have been identified off Russia. [29] At least 195 individual orcas have been cataloged in the eastern tropical Pacific, ranging from Baja California and the Gulf of California in the north to the northwest coast of South America in the south and west towards Hawaii. [ 31 ]
Bigg's killer whales were the most frequently documented last year, and many finding food sources in the Hood Canal. Transient whales, whose Salish Sea visits are increasing, spending time in Hood ...
The sympatric transient (Bigg's) orcas travel in small, family groups, with individuals cooperating to kill and eat marine mammals together. [30] By contrast, the large, multi-family, multi-generation southern resident pods behave in a way that may increase their success in hunting the salmon that forms the southern resident orca diet .
Both males and female orcas remain within their natal matriline for life. [4] Matrilines have a tendency to split apart over time. [3] Pods consists of related matrilines that tend to travel, forage, socialize, and rest together. Each pod has a unique dialect of acoustic calls. Pods that share one or more certain calls belong to a common clan. [4]
A rare example of sympatric speciation in animals is the divergence of "resident" and "transient" orca forms in the northeast Pacific. [26] Resident and transient orcas inhabit the same waters, but avoid each other and do not interbreed. The two forms hunt different prey species and have different diets, vocal behaviour, and social structures.
A pair of orca whales were spotted sharing a meal along the Channel Islands off the coast of Southern California, video uploaded on June 27 shows.Drone footage captured by Evan Brodsky shows the ...