Evaluation of the main hypotheses proposed for the causes of decline and failure to recover of the western Steller sea lion population depends on understanding how food web linkages affect sea lions.

A team of biologists captured footage of a mother-pup pair as they ventured on an eight-hour foraging trip.

There are three extant families of pinnipeds—the otariids (sea lions and fur seals), phocids (true seals), and odobenids (walruses). Steller sea lions are members of the Otariidae family. The otariids ...