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Eastern gray squirrel biology and life cycle
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I. The Introduction A. The scientific name: Sciurus carolinensis (Wikipedia). B. The common name(s): Eastern gray squirrel, grey squirrel, cat squirrel, or migratory squirrel (Smithsonian). C. The area of residence: North America, New Jersey and Southampton Township for the city. D. The specific biome: The temperate deciduous forest (UCMP Berkeley).
II. The Body: A. Background: Eastern gray squirrels normally have narrow, elongated body. Their fur consists of a mixture of dark brown, black, gray covering from head to tail on the backside and all four paws, and a white chest and belly. Fluffy tail, big almond shaped black eyes, small round ears, all paws have five digits and the front
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Life Cycle: The Eastern gray squirrel female becomes fertile about a year old, the male is sexually active about the same time to two years. The can breed two times a year. Usually in late spring and late winter, in which the gestation period is about 45 days. Born with pink and no fur, stays with mother about 10 weeks, leaves nest around the 12th week. Survival is rare in the wild past the second year (Lawniczak). C. Structure and Function: The Eastern gray squirrel respiratory system is no different from that of a human. They breathe air in through the nose, into the lungs absorbing the oxygen, down to the heart, streaming through the blood, throughout the body and reverses back out the mouth. D. Evolution: The evolution of the eastern gray squirrel dates back to Eocene Epoch in the North American region and the Miocene Epoch Eurasia and Africa (Britanica).
a. Fossil evidence from a squirrel was determined to be 36 millions years old found in North America (Basgall).
b. The phylogentic history brought a wide change to
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Include a brief summary (1-2 sentences) about the ecological role of your chosen organism in its ecosystem. E. Wrap up the conclusive section with a closing note that provides brief information about a unique fact and/or behavior of your chosen organism.
IV. Reference section: Eastern Gray Squirrel. (2018). Wikipedia, the Free Encylopedia. Retrieved from https://en.wikipedia.org/wiki/Eastern_gray_squirrel. Lawniczak, M. K. (n.d.). Eastern grey squirrel Sciurus carolinensis. Retrieved from http://www.biokids.umich.edu/critters/Sciurus_carolinensis/ Mercer, J. M., & Roth, V. L. (2003). The Effects of Cenozoic Global Change on Squirrel Phylogeny. Science, 299(5612), 1568-72. Retrieved from https://search-proquest-com.ezproxy1.apus.edu/docview/213583204?accountid=8289 Rodentia · Sciuridae · Sciurus carolinensis. (n.d.). Smithsonian Natural Museum of Natural History. Retrieved from https://naturalhistory.si.edu/mna/image_info.cfm?species_id=298 Steppan, S. J. & Hamm, S. M. (2006). Sciuridae. Squirrels. In The Tree of Life Web Project. Retrieved from http://tolweb.org/Sciuridae The Forest Biome. (n.d.). UCMP Berkeley. Retrieved from http://www.ucmp.berkeley.edu/glossary/gloss5/biome/forests.html -
"Bradypus pygmaeus pygmy three-toed sloth” (b). Encyclopedia of Life. N.p., n.d. Web. The Web. The Web.
The respiratory system has the function of getting rid of carbon dioxide and acquiring oxygen. It works closely with the circulatory system to feed the body the proper amounts of oxygen it needs to function efficiently. The respiratory system of an American Mink is very similar to that of a human in spite of the fact that there are some minor modifications. Both Humans and Minks have two lungs, the right lung is larger and has three lobes and the left lung has two lobes. The reason why the left lun...
The American Society of Mammalogists, . Mammalian Species: Alces alces. Vol. 154. 1981. 1-7. Web.
They evolved into 2 different species by many factors in nature. The factors include genetic drift, mutation, natural selection, and etc. Genetic drift involves the bottleneck effect and the founder effect. I hypothesize that a bottleneck effect took place in the island that the rodents were living in. A natural disaster must of happened and the rodents that had high fitness survived. Therefore since one population survived, that makes them two separate species. I also hypothesize that there was a founder effect in the population of the rodents. A small portion of rodents migrated to Nevis island and reproduced. When this happened this created a whole new population of rodents. Another reason that they could have been 2 different species can be due to gene flow. Some rodents could of migrated to Nevis island.
-New Evidence Puts Man in North America 50,000 Years Ago. Sciencedaily. 2004. Retrieved from http://www.sciencedaily.com/releases/2004/11/041118104010.htm
tail. They have gray or rosy brown backs with lighter gray or brown hind legs and have
The Eastern chipmunk is a small rodent of the Sciuridae family. This chipmunk is closely related to the red and grey fox, the flying squirrel, and the woodchuck. Its Taxonomic name is Tamias Striatus. The word Tamias, Means collector or keeper and Striatus refers to its bold stripes and coloring.
A.The ferret is a member of the weasel family and it is not a rodent. It is thought to have originated from the wild European polecat.
Works Cited Bates, D. (1957, December 17). Letter from Roy Wilkins. Little Rock, Arkansas, United States of America. Beals, M. P. (1994). The Species of the World.
Atelerix albiventris, also commonly known as the four-toed hedgehog, is a fascinating organism with a plethora of intriguing characteristics. The hierarchical classification of this organism is as follows: Kingdom Animalia, phylum Chordata, class Mammalia, order Insectivora, family Erinaceidae, genus Atelerix, and species albiventris. In the genus Atelerix, there are four other species. The members of this genus include the four-toed hedgehog (Atelerix albiventris), the Somali Hedgehog (Atelerix sclateri), the Southern African Hedgehog (Atelerix frontalis), and the North African hedgehog (Atelerix algirus) (Santana 2010).The two distinctive features of the class Mammalia are the presence of hair and mammary glands. The function of hair is to serve as an insulator while the mammary glands enable females to produce nutritious, calorie-rich milk and nurse their young. Members of the order Insectivora are insect-eating mammals that have a long snout and either covered in fur or spines. Insectivores are seen as primitive mammals because they lack certain advanced characteristics seen in complex mammals, such as the primates. Instead of a ridged brain they have a smooth brain and instead of two separate openings for the genitals and anus, they have a cloaca, which serves as the opening for both the urinary and reproductive tracts. Furthermore, three commonly known mammals in this order Insectivora are the hedgehog, mole, and the. The genus Atelerix contains the African hedgehogs, which are distinguishable spines covering their bodies, a white fur belly, and typically are between six to eight inches in length (Vaughan 1972)
Fossil evidence suggests that the Cathartid (New World) vultures have been around for quite some time with two fossil species dated from the early Oligocene (about 35 million years ago). During the Pliocene and Pleistocene (about 2 million years ago) th...
"Rodents." Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 29 July 2010. Web. 8 Mar. 2014.
MATING: Siberian tigers mate in winter months and following a 3-5 month gestation period, the female produces 3-4 cubs. Cubs weigh just over 2 pounds each and are born blind. The small litter of cubs stay close to their mother for the first 8 weeks of life. By 18 months, the young are capable of hunting on their own. Young stay with their mother for 2 years, at which time they leave the pact and travel solo. The life span of the Siberian tiger is 15 years in the wild, and significantly longer in captivity.
Sikes, Roberts. and William L. Gannon. "Guidelines of the American Society of Mammalogists for the Use of Wild Mammals in Research." Journal of Mammalogy 92.1 (Feb. 2011): 235-253. Academic Search Premier. EBSCO. Web. 5 Oct. 2011.