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Dolphins

ca
by

sarah yoon

on 15 February 2011

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Transcript of Dolphins

DOLPHINS Dolphins live in an underwater environment that they have to adapt to. Their tail goes up and down to help it shoot up to get air, for they are mammals. Dolphins body adapts by the heart beating slower and saving oxygen in a special protein in their muscles called myoglobin. Blubber (aka:fat) helps the dolphin stay warm in cold water and helps them swim quick. The dolphin breathes from its blowhole. Dophins sleep half awake to always be
aware of predators and other underwater
creatures. Since dolphins are mammals
just like humans, they don't have gills.
They breathe through a blow hole on the
top of their body. Animals' adaptations .35 ? Dolphins always have a certain way they hunt for food. They create a plan and they usually hunt in groups. Their main strategy is when one surrounds a school of fish and the rest attack their prey. by:Sarah Yoon Dolphins communicate through sounds, squeals, and whistles. The whistles help coordinate group hunting, making it easier for dophins, rather than hunting alone. Some of their whistles are just vibrations that bounce off of something to let the dolphins know about things. This is called echolocation. This can not be heard by humans. DOLPHINS: Eating Habits: Resting/Sleeping: Socialization/Interactions: Other behaviors: Scientists believe that dolphins evolved from a creature called, Mesonix. It had front and hind legs to support its body weight. Over time it became more adapted to water and soon those forelegs became flippers. Its hindlegs soon disappeared. (Today, dolphins have vestigial hind legs in the form of rod-shaped pelvic bones.) Some other behaviors dolphins have is swimming with the bow waves. They like the urge of being pushed in the flow of the water. Another behavior that dolphins have is doing weird and cool tricks such as jumping, blowing bubbles, and much more! Dolphins are very intelligent animals. Their brains are pretty big compared to the size of their body. I chose to "selectively breed a cow and the dolphin because I wanted to see a mix between a water and a land animal. The new animal is now called a Dowphin. (a mix between a cow and a dolphin) I wanted the new animal to still be a mammal, an underwater creature, with black and white spots, and the ability for it to moo. I also wanted it to be able to survive on land and water. Since dolphin's teeth are permanent, they don't use them for chewing. They act as defensive weapons and aid in gripping objects. The dolphin swallows its food whole, head first to avoid the resistance of scales and slits catching in its throat. Dolphins eat invertebre fish so they are easy to swallow. Survival adaptations: Dolphins have a sharp pointed nose to help defend themselves from sharks. They also have their back fin to balance them and to swim from predators and to catch prey. Blubber warms the dolphins in cold waters so they won't freeze to death. Dolphins maintain homeostasis similar to the way humans do. They pee and poo to get rid of harmful things in their body. When they are weak and hungry they eat to give them energy and the nutrients they need to survive. Some internal stimulus dolphins have are is when they are hungry or feel weak they go out and get food(fish) to get the energy they need. Another internal stimulus dolphins need more oxygen, they dive back up to the surface to get more oxygen. Some external stimulus that dolphins have
is when they see a predator, such as sharks, killer whales, or even humans, they swim as fast as they can to get to a save location where they can hide and another would be when they sense danger they quickly avoid it. A few physical adaptations dolphins have is their pointy nose, blubber, and their fins. Some behavioral adaptations dolphins have are diving, swimming, respiration, and sleeping. A physiological adaptation a dolphin has is when they save oxygen in the certain part of their muscles. http://answers.yahoo.com/question/index?qid=20060827124921AAjkgIK http://www.slideshare.net/sth215/stimulus-and-response understanddolphins.tripod.com/dolphin
evolution.html http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookanimorgsys.html http://wiki.answers.com/Q/What_adaptations_does_the_dolphin_have http://library.thinkquest.org/3935/DOLPHINS.HTM http://understanddolphins.tripod.com/dolphinmouthandteeth.html http://www.wiu.edu/users/emp102/DolphinWeb/dolphin_behavior.htm http://www.dolphinaris.com/Dolphins-Encyclopedia/Adaptations.asp Dolpins have adaptations like hard pointy noses for defending themselves against sharks. They also have slick skin because of the blubber so they can be able to swim faster in the water. If the population of sharks
all of a sudden increased,
what would happened to
the dolphins ? (sharks
eat dolphins) SOURCES: blubber
hard pointy nose
sharp teeth
tail
fins
blow hole
AND MORE... swims fast (blubber) can dive (back fin) The dolphin population would decrease and it is a possibility that they could become extinct. The dolphins would have to try even harder to survive. The sharks would over-power.
THE END!!!! Physical adaptations
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