The Eastern Arctic Seas Encyclopedia

2016 Edition
| Editors: Igor S. Zonn, Andrey G. Kostianoy, Aleksandr V. Semenov

Sea Lion (Northern Sea Lion) (Eumetopias jubatus)

Reference work entry
Sea Lion (Northern Sea Lion) (Eumetopias jubatus) – a mammal, the largest species in the family of Otariidae. Body length of adult males averages 3.0–3.5 m, females around 2.3 m; the weight of an adult male is 700–800 kg, sometimes reaching 1,000 kg, and females around 300–350 kg. The face is broad and blunt. The neck is long and flexible. Neck and shoulders of males are covered with long hair (main). Color differs depending on sex, age, and season – from dark reddish to light brown. Lives in herds, which take one and the same plot every summer. Endemic of the Pacific Ocean northern part, inhabits the area from the Bering Strait to the Korean Peninsula. Lives on rocky capes stretching out into the sea, stones, or shingle beaches separate tiny islands in the coastal zone. S. L. is polygamic; in breeding season (May–July), they make harems of 5–20 females. Breeding rate is low: pregnancy lasts around a year, usually with one cub. S. L. matures at 4–7 years. Adults are cautious; they can be signaled of danger by birds. Animals lying on steep cliffs can dive into the sea from several meters height. S. L. eats fish (codfish, Alaska Pollack, navaga, flounder, halibut), squids (octopus, calamari, ink fish), and other invertebrate. In very rare cases, they can eat sea dogs. Perfect for training. Listed in the Red Book of Russia and the International Red Book.

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© Springer International Publishing Switzerland 2016