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Bottlenose Dolphin

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Emily Ann

on 2 November 2015

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Transcript of Bottlenose Dolphin

Reproduction
Age of sexual maturity differs depending on the location of the dolphin as well as the breeding season
Become sexually mature at an earlier age in more tropical waters (For Example Florida waters and Shark Bay off the coast of Australia)
Both male and female bottlenose dolphins have many mates
Head-butting and Tooth-scratching are among the many of the activities done during courtship
A female dolphin can get pregnant every two years but most dolphins have a three year time period to recover from a pregnancy
Taxonomy
Kingdom ~ Animalia
Phylum ~ Chordata
Class ~ Mammalia
Order ~ Cetacea
Suborder ~ Odontoceti
Family ~ Delphinidea
Genus ~ Tursiops
Species ~ Truncatus
Weight, Length, and
Life Span
The average weight of a full grown bottlenose dolphin is between 300 and 500 lbs
The average length is between 6.0 and 12.5 feet
At birth a calf's weight is between 30and 90 lbs and an average length of 35 and 50 in
The life span of an average bottlenose dolphin is between 40 and 50 years
Communication
They communicate with one another through echolocation and also use it to navigate through the water, hunt, and avoid predators in times of limited vision
It consists of a series of clicks and whistles that bounce off objects and returns to the dolphin to tell them where and how far away the object is
Each dolphin has their own individual click or whistle that can be used to identify them
Facts about
Bottlenose Dolphins
They are the most common and sociable of all the dolphin species
Very intelligent and curious creatures
They live in pods that consist of 10 to 25 individuals
They have an average of 32 teeth which are used to catch fish and other prey
At a few days old they begin to use echolocation
At the age of 3 to 4 months old their teeth begin to come in and they start to eat solid food
Day to day life consists of feeding, socializing, travel and rest
The average speed that bottlenose dolphins swim is about 20mph
Color
They have a dark gray color on their backs and a light gray on their flanks
The underside of the dolphin is white
At birth a calf is darker in color than its parents and becomes lighter as it ages
Bottlenose Dolphin

By Emily Gray
Works Cited
http://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/communication-and-echolocation/
http://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/birth-and-care-of-young/
http://www.vallarta-adventures.com/tours/signature-dolphin-swim/dolphin-fact
http://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/behavior/
http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/bottlenosedolphin.htm
http://everythingdolphins.com/bottlenose-dolphin.html
http://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/diet-and-eating-habits/
http://www.dolphins-world.com/dolphin-predators/
http://www.dolphintrainer.com/dolphins_profile.htm
http://seaworld.org/en/animal-info/animal-infobooks/bottlenose-dolphins/reproduction/
https://sites.google.com/site/pegsdollysite/digestive-system
Video About Echolocation
Birthing
Female dolphins are pregnant for 12 month
Baby dolphins are called calves
Born in the water
Usually born tail first but head first births can occur
The mother only allows one other dolphin to go near her and her calf and that dolphin is called the "Auntie Dolphin" even though they can be male or female
After birth the mother helps the calf to the surface so it can breath
Caring for the Young
The calf receives it food by nursing
Nurse for about 18 months and 3 to 8 times per hour for approximately 10 seconds
They nurse close to the surface of the water
Milk is made of 33% fat, 6.8% protein, 58% water, and with 2.2% of lactose
The milk helps the calf rapidly produce a layer of blubber
A mother keeps it baby close by her "Slip Stream"(wake that develops as a mother swims)
The mother will also click repeatedly so her calf will recognize her
A calf stays with their mother for about 3 to 6 years
Size compared to humans
Feeding
Eat a variety of fishes, squids, and crustaceans
Feed early in the morning and in the late afternoon
One strategy used to feed is "Fish Whacking" which involves the dolphin using their tail to hit a fish out of the water
Another feeding strategy used is for a pod of dolphins to round up a school of fish and each dolphin takes their turn to dive in to the pod to catch the fish
If they live by the shoreline they also drive fish to the sand bars in order to catch them
An average adult will eat about 4% to 6% of their body weight a day
A nursing mother will eat approximately 8% of their body weight
Swallow food hole
If to large the dolphin will shake or rub the fish against the ocean floor until a piece that is suitable to eat comes off
Predators
The bottlenose dolphin is one of the top predators on the food chain
The only predators that are willing to attack a bolltlenose dolphin is a large shark such as a great white shark
There has been dolphin parts found in the stomachs of Killer Whales, whether or not they were eaten or scavenged is unknown
Humans are also a predator to bottlenose dolphins because of commercial fishing businesses
The dolphins get entangled in fishing nets trying to feed on the fish
By getting entangled the dolphin can loose their fins and die from blood loss or by drowning
Humans are also predators because in China they are hunted for their blubber to make oil lamps and makeup products
Protection Strategies
Bottlenose dolphins protect themselves by staying in large groups
When felt threatened the pod will swim away at high speed
If attacked a dolphin will hit the attacker with a great amount of force with their tails
When a dolphin is attacked by a shark the other dolphins in its pod will fend the shark off by ramming it in the gills with their beak
Digestive System
Once the food is swallowed it travels down the esophagus to the fore stomach
The fore stomach serves as a holding area of food before further digestion
Once it leaves the fore stomach the food travels to the spherical stomach for further digestion
Then on to the pyloric stomach where more digestion occurs
When the digestion in the pyloric stomach is finished the food travels to the pyloric sphincter where the final parts of digestion take place
After the digestion is finished the remaining food is transferred to the intestines where waste is emptied through the rectum
Impact On Humans
Dolphins have no harmful impact on humans but can be helpful
One way that they have helpful impact humans is to be used in the Navy
They help the Navy by having trained dolphins with cameras and trackers tied on their backs dive into deep uncharted waters
The dolphins are used to inspect a ship wreck or a plain crash seen
Another way the Navy uses bottlenose dolphins is by having them swim into enemy waters to see where their submarines and other war ships are located
http://media.caller.com/media/img/photos/2009/05/13/0514_LOC_terrorist_bomb1_t607.jpg.
http://c0026106.cdn1.cloudfiles.rackspacecloud.com/506a855fc12541a79292121e6d0639b3_dolphin5_460x345.png.
http://ambientbluecreative.com/animals/Animal-Info/Animal-InfoBooks/Bottlenose-Dolphins/_images/pic-mother-calf-bonds.png.
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