Steller Sea Lions are the largest of the species in the world. One reason is, motor boats running over and killing or injuring these creatures. The Steller sea lion (Eumetopias jubatus) is the largest of all sea lions. The steller sea lion is a pinniped – literally meaning feather-footed. Steller Sea Lion – Eumetopias jubatus Description. These sea lion are being fished and killed for their skin to make clothes for humans. The males can be as long as 11 feet and weigh 2,500 pounds. Because of a large population decline, Steller sea lions were listed as threatened under the Endangered Species Act (ESA) in 1990, and the western population of sea lions was listed as endangered in 1997.

They share parts of their range with a smaller related species, California sea lions. Steller sea lions have low productivity. Steller Sea Lions have been a threatened species throughout the 1990's.

Numbers dropped from over 300,000 individuals to fewer than 100,000. Distribution and Numbers Steller sea lions, also known as Northern sea lions, are the largest of the Otariidae (eared seals) and are distributed around the rim of the North Pacific Ocean from California to northern Japan. This can be a gruelling process and males use their huge size to intimidate others and secure their spot.

Named after Georg Wilhelm Steller, the German naturalist on the Bering expedition who fi rst wrote about the species in 1742, the Steller (or northern) sea lion is the largest member of the family Otariidae, the “eared seals,” which includes all sea lions and fur seals. It is a vicious marine predator, even hunting northern fur seals, harbor seals, and Sea Otter pups. Steller sea lions feed opportunistically on fishes (mainly demersal and off-bottom schooling species) and cephalopods; sometimes also on various other invertebrates (cnidarians, sand dollars, worms, shelled mollusks, crustaceans, etc.) In 1990, the Steller sea lion was listed as threatened throughout its range. California sea lions are very intelligent and can be trained basically the same way a dog is trained. The Steller Sea Lion is the only otariid that breeds and resides year-round in Canadian waters. Adult females average 2.1-2.4 m in length and weigh 200- 300 kg; and adult males are 2.7-3.1 m and weigh 400-800 kg. The Steller sea lion is the largest species of sea lion in the world, with adult males reaching a length of almost 11 feet and a weight of up to 2,400 pounds.
Assess the effects of sea lion predation on white sturgeon in the Columbia and Willamette Rivers. Steller Sea Lion Conservation. Later studies of mitochondrial DNA from Steller sea lions suggest that there are at least two stocks, an eastern stock (California through Southeast Alaska) and a western stock (Prince William Sound and areas west).

The females are much smaller with a length close to 9.5 feet and they don’t weigh more than 800 pounds. The eastern population inhabits the Pacific coast from the Alaskan Panhandle to the Channel Islands, though only about 500 individuals live in California.


Although males mature early, they often are not successful until they are over the age of nine, mature and strong enough to stake a territory. The cause is still a mystery.

The U.S. FWS's Threatened & Endangered Species System track information about listed species in the United States. Steller sea lions use haul-out sites on rocks, reefs, or beaches. Threatened Species: Over 80% of the Steller sea lion population disappeared from Russian and most Alaskan waters (Gulf of Alaska and Bering Sea) from 1980 to 2000, leaving fewer than 55,000 individuals. Between the 1960s and the 1990s the species experienced a dramatic 70% loss in population. It has a range that extends across the North Pacific Ocean, from Northern California up to Alaska and across the Bering Sea to Russia and Japan. U.S.FWS Species profile about species listing status, federal register publications, recovery, critical habitat, conservation planning, petitions, and life history.


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