Page 15 - World of Animals - Issue #41
P. 15

Harbour seal                                                                                  Seal extremes


                                      The most widely distributed
                HARBOUR SEAL          pinniped travels far and wide for
                Phoca vitulina        food, then swallows it whole
                Class Mammalia
                                      Harbour seals vary in appearance
                                      from dark grey to sandy brown,
                                      but they can be picked out by their
                Territory Coastal waters of the   characteristic posture on land, with
                Northern Hemisphere   both their head and tail in the air. Their
                Diet Fish, crustaceans and
                cephalopods           territory includes coastlines of both the

                Lifespan 30-35 years  north Atlantic and north Pacific Oceans,                               Largest: Southern elephant seal
                Adult weight 70-150kg   where the seals will travel up to 50                                Named a er their trunk-like

                (150-330lb)

                Conservation status   kilometres (30 miles) away from the coast                             inflatable snouts, males can weigh
                                      in search of a meal, often staying out at sea                         3,700 kilograms (8,160 pounds) and
                                      for days. Once they have caught prey, such                            reach lengths of six metres (20 feet).
                                                                                                            Dominant males will collect ‘harems’


                LEAST CONCERN         as fish or squid, they will swallow it in a single                     of 40 to 50 females and fight off any

                                      gulp or tear it into chunks, not bothering to chew.                   rivals in noisy, violent battles.
                 Harp seal
                 These strong swimmers make epic annual migrations to breed
                 Harp seal pups are born with a   that gradually increase in size   Harp seals spend most of their
                 fluffy yellow coat, which is soon   until they form the harp-shaped   time at sea, hunting for fish and


                 bleached to a pristine white. This   pattern they are named after.  crustaceans. They are powerful

                 is moulted 18 days later, when   Once they have left the ice   swimmers, using their flippers to   Smallest: Ringed seal

                 the young seals are known as   they were born on, harp seals will   propel themselves forward. Their   Ringed seals are named a er the grey
                                                                                                            spots encircled by silver rings on their
                 ‘beaters’, due to the way they   migrate north to Arctic feeding   eyes are constantly lubricated   backs. However, these markings can
                 wave their flippers up and down   grounds. For some, this can be   due to the absence of tear ducts,   be so dense that they merge into a

                 while learning how to swim. They   a journey of 4,000 kilometres   and they are able to spend long   mottled pattern. They reach lengths of

                 will continue to moult once a   (2,500 miles), but they will make a   periods submerged by lowering   up to 1.6 metres (five feet) and weigh
                                                                                                            around 70 kilograms (150 pounds).
                 year, developing black patches   return trip each winter to breed.  their heart rate by 90 per cent.





                                                                                                            Most common: Crabeater seal
                                                                                                            Around 15 million crabeater seals
                                                                                                            inhabit the Antarctic region, from the
                                                                                                            coasts of Antarctica to as far north
                                                                                                            as Australia, South Africa and South
                                                                                                            America. This makes them by far the
                                                                                                            most common pinniped in the world,
                                                                                                            and possibly the most numerous
                                                                                                            large mammal too.












                                                                                                            Fastest: Leopard seal
                                                                                                            Just like their feline namesakes,
                                                                                                            leopard seals are ruthless predators.
                                                                                                            They reach speeds of 37 kilometres
                                                                                                            (23 miles) per hour, easily quick
                                                                                                            enough to take a penguin by surprise.
                                                                                                            They can also use their lightning   © NaturePL; FLPA; Alamy
                                                                                                            speed to launch themselves into the
                                                                                                            air, grabbing unsuspecting seabirds
                                                                                                            in their jaws.

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       012-019_WOA41_Seals of the world.indd   15                                                                            01/12/2016   09:57
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