Sentences with phrase «by killer whales»

«The obvious cause is that sea lions are being eaten by killer whales,» he says.

He adds, «With all the other cases, there is some uncertainty as to whether the population declines were really caused by killer whales.»

Some excited boaters today confirmed an attack by killer whales on an adult gray by videotaping the encounter.

The group then boards the board and we enjoy a 2 hour scenic ride up to our basecamp in Johnstone Strait (the same route that is often frequented by killer whales).

«5 - 10 million years ago the killer whale emerged and then evolution began to favor the toothed whales that could avoid being captured by killer whales.

Although elephant seal predation by killer whales is often reported by Sea Lion Island visitors, its real frequency is unknown, and the capability of killer whales to regulate the population dynamics of elephant seals is uncertain.

They are preyed upon by killer whales (orcas) and white sharks.

Although Ingrid's studies take place in New Zealand, the hunting techniques she describes are very similar to those used by killer whales pursuing seals in the San Juan Islands of Washington: cooperative herding, surpise attacks, and powerful blows from the flukes to deal the death blow.

Scientists are beginning to recognize a pattern in humpback whale behavior around the world, a seemingly intentional effort to rescue animals that are being hunted by killer whales.

Whale Watching Through the Seasons Spring: Baby Grays lure in Orcas View the northbound migration of the California gray whale and their calves, as well as the arrival of the humpbacks, and frequent visitations by killer whales.

Initial speculation was that this death was caused by killer whales, too, as the dead gray whale had deep gouges on its belly.

Some of that evidence is being gathered off the coast of California, where recovering populations of humpback, gray, and blue whales show telltale signs of attacks by killer whales.

(«Bitten off by a killer whale?»