BY CARLAYA CHRISTENSEN AND AUSTIN PARKERSON Table of contents Intro slide 3 Description slide 4 Story slide 5 Movement slide 6 Dietfood chain slide 7 Habitat slide 8 Adaptations slide 9 ID: 590923
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Slide1
The desert tortoise
BY CARLAYA CHRISTENSEN AND AUSTIN PARKERSONSlide2
Table of contents
Intro slide 3
Description slide 4
Story
slide
5
Movement slide 6
Diet/food chain slide 7
Habitat slide 8
Adaptations slide 9
Life cycle slide 10
Survival stats slide 11
Behavior slide 12
Conclusion slide 13
Glossary slide 14
Bibliography slide 15Slide3
introduction
Most people don’t know a lot about the Desert Tortoise because they haven’t actually seen one. So if you’re going to read this report you’re on the right track.Slide4
Story the hare and the tortoise
One day a jackrabbit
bragged about his quickness to the desert animals. The jackrabbit said
“No one has or will ever beat me, because
w
hen
I run at full speed no one can beat
me.” The
Desert Tortoise
yelled,” I want to challenge you to a race.”
Later that evening a
path was planned and a start was made. The jackrabbit darted out of sight almost at once. He soon stopped and took a nap in the warm sun. He knew the tortoise could never catch up.
Mean while the
tortoise
walked
steadily onward. When the jackrabbit woke up, he
couldn’t see the
tortoise
any were.
He
bolted towards the finish line, and when he got there the tortoise was standing there waiting for him.Slide5
description
The Desert Tortoise looks really cool. Its colors are brown, olive green, yellow, black, pale brown, and plastron yellow. On their shells they have hexagons all over. They are 8-15 pounds. They also have sharp claws to help dig burrows.Slide6
movement
The desert tortoise is a quadruped and they are slow moving creatures. They can walk up to 7 miles every day. They dig with their forelimbs and push soil out of the burrow with their hind limbs.Slide7
Food chain
The desert tortoise gets eaten by a lot of different animals. The tortoise eats cacti that are fed by the sun and water. Then coyotes, bobcats, badgers, and golden eagles all eat tortoises. Next coyotes also eat bobcats. Finally mountain lions eat
coyotes.Slide8
Map of their habitat
The desert tortoise lives in a very vast area. The states they live in are Southern California, Southern Nevada, Southwestern Utah, Southern and Western Arizona, and Mexico. The regions they are found in are the Eastern
Sonoran
Desert and the Mojave Desert. The ecosystem they are most commonly found in is the desert. The shelters they live in are gravel washes, desert washes, open washes, sandy canyon bottoms below 3,500 feet, burrows, rock overhangs, overhangs, crevices in rocky areas, shallow pallets, beneath shrubs, rocky canyons, and hillsides.Slide9
adaptation
The desert tortoise has a few cool adaptations. They can burrow underground to escape heat. They also can store water in their bladder and pee when a predator picks them up. To keep themselves from losing moisture, they are able to tolerate high levels of urea in their bodies. To help, they can also go long periods of time without food or water.Slide10
Life cycle
1-14
eggs
In egg under ground between 70-140 days. 2-3 out of 100 live to adult hood
Mature at 15-20Slide11
Survival stats
The desert tortoise is marked as an endangered species. Their populations’ numbers have decreased by 90% since the 1950’s. There are about 100,000 desert tortoises left. In the late 1950’s there were at least 200 adults per square mile. Now there are between 5-60 adults per square mile.
Changes in populationSlide12
behavior
The desert tortoise acts in some funny ways. First, fighting occurs when either two males run into each other, or when there is a group of turtles. Second, since there is only a small amount of rainfall yearly in the desert, they dig a pit to catch the falling water. They can also reuse the water that reaches their bladder. That is the reason they can go so long without drinking water. Finally, the reason they can live in a desert where ground temperatures can reach 140 degrees Fahrenheit, is that they burrow themselves into the ground.Slide13
Conclusion
The desert tortoise helps all other desert animals survive with their burrows, because there are some desert animals who cannot dig their own and depend on abandoned tortoise burrows for their shelter. Soon the desert tortoise will be extinct if we don’t do anything about . If the tortoise goes extinct, cactus will take over our deserts and other species might go extinct as well.Slide14
glossary
Gopherus
agassizii
– the desert tortoise.
Carapace – upper or topside of the shell.
Plastron – stomach side of the shell.
Quadruped – animal that walks on four feet.
Urea – occurs in urine and other body fluids as a product of protein.
Pallot
– a bed.
Clutch – the amount of eggs laid.
Endangered - almost extinct.Slide15
Bibliography
Craig Ivanyi. Arizona-Sonora Desert Museum. http://www.desertmuseum.org/
2006
Kristine B
onner
. Desertusa.com
http://www.desertusa.com/reptiles/desert-tortoise.htm1
2006
Jamie Rappaport Cark. Defenders of Wild Life
http://www.defeders.org/
2012
Sophie Lockwood. Desert Tortoise. Childs World
Spring Valley April 11 2008