Killing the protected animals may be the only way to stop them from eating too many of the Pacific Northwest’s endangered ...

PORTLAND, Ore. - A federal agency has authorized the killing of some California sea lions that prey on migrating salmon and steelhead at the base of Bonneville Dam on the Columbia River. The lethal ...

To rule out nutrient scarcity as a cause, he says you’d need to look not only at the quantity of food, but also the quality.

When scientists compared what California sea lions eat in the Channel Islands (U.S.) and the Gulf of California (Mexico), they expected to find a clear explanation for why populations were booming in ...

Here's what happens: The plankton eat algae that contains the acid, and then the fish eat the plankton, and the sea lions eat the fish — one thing surviving off another, passing on the toxic acid.