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DOLPHINSCREATED BY:

NATASHA RAY,2ND GRADE, ROOM C-20

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TABLE OF CONTENTS1.INTRODUCTION

2.GROUPS3.CHARACTERISTICS

4.BREATHING5.HEARING AND COMMUNICATION

6.HOW DO THEY EAT7.EATING HABITS8.DOLPHIN BIRTH

9.DOLPHIN ENEMIES10.CONCLUSION

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DOLPHINS

IntroductionDolphins are mammals that live in the water. Although these sleek creatures look like fish they are not. They are air

breathing mammals just like us. Dolphins are mammals called

cetaceans, which means “sea monster.’’

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Platanistidae

Groups Dolphins are divided into two groups.

The larger most common group is called “Delphinide” which are salt water

dolphins. The smaller group is called “Platanistidae” which are freshwater

dolphins.

Delphinide

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DOLPHIN GROUPS

DELPHINIDE (salt water dolphins)

PLATANISTIDAE (fresh water dolphins)

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Characteristics

Dolphins are warm blooded which means they use part of their energy to maintain a stable

body temperature. Dolphins have fat which is called blubber that insulates them from the cold water. Some dolphins in Artic regions can have

blubber that is 20 inches thick!

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DOLPHIN BODY PARTS

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How do dolphins breathe?

Dolphins have lungs just like us and they fill them with air through their nose

or blowhole. When we breathe we replace only 15 percent of the air in our lungs with fresh air. Dolphins replace 90

percent of the air in their lungs with fresh air. So dolphins can stay underwater for 7-10 minutes.

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DOLPHIN BREATHING

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Hearing and communication

Hearing is a dolphin’s most important sense. Dolphins have a unique way of

gathering information called “Ecolocation”. Dolphins make creaky

door sounds, high pitched squeals, rat a tat clicks, chirps, whistles, groans and

claps. They make a lot of noises that are too high for the human ear to hear.

Each dolphin has a unique whistle that can be recognized by other dolphins.

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DOLPHIN ECHO LOCATION

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EATING HABITS

All dolphins are carnivores. They eat mostly fish and squid. Dolphins don’t drink water

directly. They get water from the foods.

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CRUSTACEANS MACKARELL SQUID

TYPES OF FOOD

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How do they eat?

To hunt fish some species of dolphins use a method called ‘’herding’’ which

is performed by a pod of dolphins, where some of them surround a school of fish as close as possible. Then the others take turns to dive through the

fish and feed.

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DOLPHINS HERDING FOR FOOD.

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Dolphin Birth

Dolphins do everything underwater. A dolphin mom gives birth to a calf who is about a third the size of mom herself.

She feeds her calf with her milk just like other mammals.

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MOTHER DOLPHIN AND HER DOLPHIN CALF

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Dolphin Enemies

Dolphins avoid sharks because they count them as enemies. Unfortunately as much as most people love dolphins we are their worst enemy. We pollute their homes and people in

some countries use dolphins as bait for catching fish! The biggest danger from

humans is from factory fishing operations.

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PINK DOLPHINS IN AMAZON RIVER ARE USED AS BAIT!

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Conclusion

I love dolphins because they are very playful mammals. Thank you for reading this book. I really hope

you enjoyed this book!

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SAVE DOLPHINS!

THANK YOU!

Image Attribution/Citing

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http://www.elegantdirectory.com/articles/interesting-facts-about-dolphins.html#

http://www.sandiegonewsnet.org/pink-dolphins-in-amazon-river-slaughtered-as-bait-2010793.html

http://www.enchantedlearning.com/subjects/whales/species/Bottledolphin.shtml

http://www.adoptadolphin.org.uk/

Lobster, Spiny. 2003. Image.23 March 2011. <http://www.discoveryeducation.com/>.

http://www.norsupplies.com/?tmpl=butikk&a=list&&b_kid=507671

http://www.soest.hawaii.edu/HURL/gallery.html

www.flickr.com/photos/38504374@N02/3590199054/

http://professorpaulsnatureencyclopedia.blogspot.com/2011/01/platanistidaeindian-river-dolphins.html

http://eyesontaiji.org/about-dolphins/

http://sharp-science.blogspot.com/2010/12/sardine-run-yearly-feeding-frenzy-off.html

http://www.ehow.com/how-does_4566580_dolphins-use-echolocation.html