Walruses By:Katy ErdleandKerry Carlisle
The life of a Walrus • There are 2 walrus subspecies that exist today one is the Pacific and the other is the Atlantic Walrus. • A Walrus lives around 16-30 years. • The age of a walrus can be estimated by slicing a section of the cheek tooth and counting the layers. • The total population of Walruses today is estimated to be around 250,000. • The Walruses scientific name is Odobenus rosmarus.
Walruses living quarters! • Walruses live in very cold water. They like it where the air temp. is -15 to +5 degree C. • Walruses spend about 2/3 of their lives in water. They also love to lay on the ice in the artic. • Walruses have a thick layer of blubber to keep warm.It is about 15cm thick.
Walruses appetite and birth! • A female walrus takes 1 year to develop its young before birth after mating. • A walrus weighs 99-165lbs at birth. • A walrus can weigh up to 3,000 lbs. at full growth. And it can get up to 8-12 ft. in length. • A Walrus eats bivalve mollusks such as clams. They will also eat worms, snails, squads, and crabs.
Facts about Walruses reproduction! • Most male Walruses are mature at 8-10 years old. Successful reproduction is probably around 15 years. • Most females are sexually mature at 5-6 years old. • Most mating occurs December-March. • A male Walrus is called a Bull • A female walrus is called a cow. • A baby Walrus is called a calf
A Bull displays visually and vocally from the water while the female rests. The display includes teethclacking, clanging bell-like sounds, and whistles. The female or cow then joins the Bull and that is wherecopulation takes place. After the mating season the bulls return to all- male herds. The calf is born a year later. The calf stays with it’s mother up to 2 years maybe longer, if the mother does not have another calf in thattime. The Mating scene and after!
The books we used…. 1. The Internet: www.seaworld.org/Walrus. 2. The encyclopedia under W. 3. The Marine biology book.