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Weddell seal

awsome seal

Arin Broughton

on 8 June 2011

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Transcript of Weddell seal

The Weddell Seal is the most well known and appealing of all of the Antarctic seals, the Weddel seal lives farther south than any other mammal. These relatively peaceful animals are usually found in big groups on fast pack ice (ice attached to the continent) and can be easily reached by humans. Most of their time, however, is spent on the frigid Antarctic waters beneath sevral metres of ice, only emerged through cracks and blowholes to breath, rest, and have their pups. The scintific name is Leptonychotes Weddellii. With their "smiling", wiskered faces and relativly small heads the large Weddell seal is quite Apealing in appearance. After molting the Adults bodies are blue-black and spotted silver-grey, then fading to rusty brown. Their short, dense fur protects them from freezing water tempratures as low as 2.2 degrees celsius. Weddell seals have whiskers which increase their sense of touch. V-shaped nostrils which close while having a rest. Unlike Crabeater and Leopard seals, Weddell seals are somewhat fat and not streamlined. Females are slightly larger then males. Since Weddell seals use their strong teeth to chew and scrape breathing holes under the ice, extensive tooth ware occurs and is often a cause of mortality as older seals lose their ability to hunt or maintain their holes. Both male and female Weddell seals vocalise nosily under water using a variety of calls; Males may do so to establish their territories. feeding mainly at night, Weddell seals dive to deep depths in pursuit of fish, spuid and krill. by collapsing their lungs and decreseing their breathing rates, They are able to stay under water for an hour. Also Weddell seals are seen blowing air bubbles under cracks under the sea ice to flush out prey. Like all seals, Weddell seals don't chew their food, they swallow it in big chunks under water. when winter arives, Antarctic mammals move to warmer climates. But the Weddell seal stays in Antarctica. They stay warm by living below the ice, although they must make air holes in the ice to survive. Common gnawing at these ice holes causes tooth erosion and is thought to be why Weddell seals do not live as long as other seals. During the mating season, Male Weddell seals have been seen 'hanging around' their ice holes defending the territory from other males hoping to seduce the female as she comes up for air. Mating takes place underwater But the pups are born between September to november in colonies above the ice. Females only give birth after the age of six and to one pup annually. weddell pups stay with their mother longer then other of their species. weighing an average of 27 kg at birth, they can gain as much as 90 kg in the six to eight weeks on feeding on their mothers' fatty milk. here is a youtube on a Weddell seal. killer whales and leopard seals are the main predators to Weddell seals but due to living so fardfdfvfdvfdvfvfvfdvfvfdvfdvfdvdfvfvdfv south killer whales and leopard seals are the main predators of the Weddell seal but due to living so far south and often under sevral metres of ice, They are relitively safe. Scientists have found Brucella Antibodies in a Weddell seal. Brucellosis can cause sterility and spontaneous abortion in cattle but so far there is no evidence of the disease itself in the Antarctic. People should respect the Species of the Weddell seal. Everyone should protest against sealing and save these Beautiful Animals. .http://uktv.co.uk/images/pdf/fact_seal.pdf

.http://www.antarcticconnection.com/antarctic/wildlife/seals/weddell.shtml Appearance Diet Habitat Breeding Bibliography Predators
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