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

In Astoria, sea lions are an endemic presence along the Columbia River banks and especially along the Port of Astoria’s East Mooring Basin. The port has experimented with several nonlethal methods for ...

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 ...

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.

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.

It's known as the "Bonneville Buffet." Below Bonneville Dam, located 40 miles east of Portland, Ore. in the Columbia River Gorge, sea lions, sometimes by the dozens, gather to feed on tightly packed ...

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 ...