1. DOLPHINS CREATED BY: NATASHA RAY, 2ND GRADE, ROOM C-20
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2. HEARING AND COMMUNICATION
TABLE OF CONTENTS
INTRODUCTION
GROUPS
CHARACTERISTICS
BREATHING
HEARING AND COMMUNICATION
HOW DO THEY EAT
EATING HABITS
DOLPHIN BIRTH
DOLPHIN ENEMIES
CONCLUSION
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3. DOLPHINS
Introduction
Dolphins 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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4. Platanistidae
Delphinide
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.
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5. DOLPHIN GROUPS PLATANISTIDAE (fresh water dolphins)
DELPHINIDE (salt water dolphins)
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6. 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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7. DOLPHIN BODY PARTS
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8. 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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9. DOLPHIN BREATHING
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10. 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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11. DOLPHIN ECHO LOCATION
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12. 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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13. CRUSTACEANS MACKARELL SQUID
TYPES OF FOOD
CRUSTACEANS MACKARELL SQUID
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14. 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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15. DOLPHINS HERDING FOR FOOD.
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16. 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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17. MOTHER DOLPHIN AND HER DOLPHIN CALF
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18. 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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19. PINK DOLPHINS IN AMAZON RIVER ARE USED AS BAIT!
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20. 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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21. SAVE DOLPHINS!
THANK YOU!
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22. Image Attribution/Citing
Lobster, Spiny Image.
23 March <
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