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Kineton
Primary
Shape Gang - Dolphins |
All
the K P Shape Gang love Dolphins!!
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Dolphins
may look like fish but they are mammals. They breathe air, just like
you do.
Dolphins
breathe through a hole on the top of their head. It is called a
blowhole.
A Dolphin swims to the surface.
It breathes out air. Water sprays up.
It breathes in and dives under water.
Dolphins are
very playful, Chloe Cloud loves to swim with them! |
| Background |
Dolphins
are intelligent, social, curious, and brave. They can be found in
virtually all the seas and oceans of the world. Dolphins are our
favourite mammal according to a recent UK survey.
Dolphins are members of the cetacean family, which also includes
whales and porpoises. There are more than 30 species of dolphin but
not all live in the oceans - river dolphins are found in many
countries such as Brazil, India, China and Pakistan.
Lifestyle
Most dolphins are social animals - some live in groups (called pods)
of several hundred. They hunt in a variety of ways, sometimes in
teams, feeding on squid, shrimp, eels and a wide variety of fish.
After a gestation period (pregnancy) of a year, a dolphin normally
gives birth to a single calf that is almost half the length of its
mother. It is able to swim immediately and is fully weaned at 18
months. Many calves stay with their mother until the age of three.
Mature dolphins generally give birth every two to four years.
A
mother dolphin shows her baby how to breathe. She teaches it how to
look for food.
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This
Baby Spinner Dolphin is drinking milk from her mother.
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If
a dolphin is sick the other Dolphins take care of it.
Activities
Dolphins are very playful and acrobatic mammals. Some can swim at
speeds of up to 14 knots. They sometimes "spy hop",
revealing the whole head and body down to the flipper for three
seconds or more. Dolphins are often seen hitching a ride, "bow
riding" in the bow wave in front of a ship. Dolphins can dive
to depths of more than 300 metres and can jump up to six metres in
the air.

Dolphins
are extremely vocal - they make two kinds of sound:
- Dolphins
use a series of high-pitched clicks to build up a "sound
picture" of their surroundings by listening to the echoes
bouncing off objects. This enables them to tell the position of
their prey and even its size and shape. This is known as
echolocation.
- Dolphins
also produce high-pitched whistles and squeals, which they use
to communicate with each other.
Dolphins around the UK
More than 20 species of cetacean have been recorded in UK
waters. There are at least three populations of bottlenose
dolphins known to live in mainland UK waters - in the Moray
Firth, Scotland, Cardigan Bay, Wales, and off the coasts of
Dorset, Devon and Cornwall. The population in Scotland is the
most northerly known population. Harbour porpoises, smaller
cousins to the dolphin, are also resident in UK waters.
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More
Dolphin Facts
Largest
member of the dolphin family is the killer whale (Orcinus orca),
which grows to a length of 9m (29.5ft) and weighs about 10 tons. Killer
whales hunt in packs and will kill fish, squid and marine mammals such as
seals and whales - including other dolphins! The killer whale is found in
all the oceans of the world wherever suitable prey species exist.
| Many
kinds of dolphins and porpoises are sociable animals and live in
schools varying in size from a family group to around 1,000
individuals. Some dolphins, especially the common dolphin seem to
enjoy playing around the bows of ocean-going ships. They use the
pressure valve built up around the bows and "freewheel"
along just in front of the ship. Dolphins are fast swimmers and can
maintain a steady speed of up to 20mph of required. |

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The
dolphins are considered to be, next to Man, the most highly intelligent of
all animals. Their relative body to brain size is similar to those of
humans and their ability to reason, learn and communicate has amazed
scientists who have worked with these attractive and very interesting
animals.
Find
out more ??
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