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Dolphins Under the Sea By: Nita Amalia
XII IPA 2SMAN 2 MATARAM
Hi, welcome to our Dolphin Presentation.
We chose the dolphins because they are so friendly
with people. Another reason why we chose
the dolphin is because they are a mammals like we are.
Why Did We Pick This Animal?
Description
DESCRIPTION• Dolphins have gray skin, they can also have different
color skin. There is a pink dolphin in the Amazon.• The body is sleek and smooth; the hairless skin is
rubbery to the touch. Most species have jaws that protrude into a beak like snout.
• They are a warm-blooded vertebrate animal.
Adaptations
•Dolphin’s have smooth skin.Dolphin’s have smooth skin.•They have slippery bodies that help They have slippery bodies that help them glide through the water. them glide through the water. •Blubber (fat) helps the dolphin stay Blubber (fat) helps the dolphin stay warm in cold water. warm in cold water.
Habitat
General Habitat
This animal lives in warm salty waters. They are able to live in a wide variety of
marine habitats, from deep oceans to shallow shorelines. Coastal living dolphins
can be found in harbors, bays,lagoons, and river mouths that open into the oceans. Offshore living bottlenose
dolphins do equally well in the deep, cold oceans far from shore.
Temperatures
• Dolphins are sensitive to water temperature changes• The largest bottlenose dolphins live in the coldest
waters. The smallest live in the warmest waters. • Ocean temperatures can also affect the kinds of
foods that live in an area, which in turn affects dolphin behavior.
Water•Since dolphins live in the water it is very important to them.•Dolphins breath air even though they are water animals and they can drown in fishing nets.•Dolphins are very sensitive to changes in their habitat from trash being dumped to global warming.
Plant Life•There are
different water plants that are in a dolphin's enviroment.
•There is seaweed and plankton
•Dophins eats fish who live on this plant life.
Animal Life
• There are different animals that live in a Dolphins enviorment.
• There are little fish that Dolphins like to eat like shrimp or mullet
• The big animals that also share the same habitat are sharks and sea turtles.
Sensory Organs
Sight
• Dolphins have very good vision both above and below the water.
• They are able to see in both environments, because they can control the way light enters their eye.
• One way they use their sight to escape predators
Smell• It is believed that they have no
sense of smell• They rely on their other senses to
help them in the wild• Tasting the water can be their way
of "smelling" it.
Hearing
• Dolphins hear about 7 times better than humans do.
• They can hear vibrations in the water
• It is believed that their teeth are arranged in a way that works as an antenna to receive the incoming sound
Taste
• Little is known about a dolphin's sense of taste• They do have taste buds • They show strong preferences for certain types
of fishes.
Touch• The dolphin's sense of touch is
also well-developed• A bottlenose dolphin's skin is
sensitive• It will shy away if a human
attempts to touch it.
Food and Life Cycles
Life Cycle
•After eleven or twelve months, depending on the species, a After eleven or twelve months, depending on the species, a pregnant dolphin gives birth. pregnant dolphin gives birth.
•Dolphins, like almost all mammals, give birth to live young, Dolphins, like almost all mammals, give birth to live young, and nurse them and nurse them
•A calf stops nursing at 18 months. At 3-4 months old the A calf stops nursing at 18 months. At 3-4 months old the calf gets teeth and begins to eat fish. When calves are only a calf gets teeth and begins to eat fish. When calves are only a few days old they can vocalize (make sounds). few days old they can vocalize (make sounds).
•A dolphin’s average life span is probably 20 years or less; A dolphin’s average life span is probably 20 years or less; even though, dolphins have lived as long as 48 years. even though, dolphins have lived as long as 48 years.
Food Chain
The sun warms the plants, which the small sea animals eat, and the dolphin eats the small sea animals, and the shark eats the dolphins.
Interesting Facts
Interesting Fact #1
These warm-blooded mammals belong to a group which also encompass all whales.
Interesting Fact #2
Dolphins have been clocked at speeds of 26.3 km/hr, which they
maintained for about 1500 meters, leaping constantly.
Interesting Fact #3
A dolphins’ long nose helps them kill sharks.
Interesting Fact #4
They breathe through a special opening on their heads called a "blowhole". When dolphins are
relaxed or underwater, their blowholes are closed.
Resources
http://library.thinkquest.org/CR0215242/dolphins.htm http://thedolphinplace.com/facts.html http://en.wikipedia.org/wiki/Dolphin http://www.dolphinsplus.com/dolphin-information.htm#hearinghttp://www.dolphinsplus.com/dolphin-information.htmhttp://www.dolphins-world.com/Dolphin_Reproduction.htmlhttp://library.thinkquest.org/3935/DOLPHINS.HTM
The End
Bye - Bye
Hope you enjoyed the
show!