|Dromedary camel, Camelus dromedarius|
|Bactrian camel, Camelus bactrianus|
|Global range of the dromedary|
A camel is an even-toed ungulate within the genus Camelus, bearing distinctive fatty deposits known as "humps" on its back. The two surviving species of camel are the dromedary, or one-humped camel (C. dromedarius), which inhabits the Middle East and the Horn of Africa; and the bactrian, or two-humped camel (C. bactrianus), which inhabits Central Asia. Both species have been domesticated; they provide milk, meat, hair for textiles or goods such as felted pouches, and are working animals with tasks ranging from human transport to bearing loads.
The term "camel" is derived via Latin and Greek (camelus and κάμηλος kamēlos respectively) from Hebrew or Phoenician gāmāl. The Hebrew meaning of the word gāmāl is derived from the verb root g.m.l, meaning (1) stopping, weaning, going without; or (2) repaying in kind. This refers to its ability to go without food or water, as well as the increased ability of service the animal provides when being properly cared for.
"Camel" is also used more broadly to describe any of the six camel-like mammals in the family Camelidae: the two true camels: the dromedary and bactrian, and the four South American camelids: the llama and alpaca are called "New World camels", while the guanaco and vicuña are called "South American camels".
- 1 Biology
- 2 Domestication
- 3 Distribution and numbers
- 4 See also
- 5 Notes
- 6 References
- 7 Further reading
- 8 External links
The average life expectancy of a camel is 40 to 50 years. A full-grown adult camel stands 1.85 m (6 ft 1 in) at the shoulder and 2.15 m (7 ft 1 in) at the hump. Camels can run at up to 65 km/h (40 mph) in short bursts and sustain speeds of up to 40 km/h (25 mph). Bactrian camels weigh 300 to 1,000 kg (660 to 2,200 lb) and dromedaries 300 to 600 kg (660 to 1,320 lb).
The male dromedary camel has in its throat an organ called a dulla, a large, inflatable sac he extrudes from his mouth when in rut to assert dominance and attract females. It resembles a long, swollen, pink tongue hanging out of the side of its mouth. Camels mate by having both male and female sitting on the ground, with the male mounting from behind. The male usually ejaculates three or four times within a single mating session. Camelids are the only ungulates to mate in a sitting position.
Ecological and behavioral adaptations
Camels do not directly store water in their humps as was once commonly believed. The humps are actually reservoirs of fatty tissue: concentrating body fat in their humps minimizes the insulating effect fat would have if distributed over the rest of their bodies, helping camels survive in hot climates. When this tissue is metabolized, it yields more than one gram of water for every gram of fat processed. This fat metabolization, while releasing energy, causes water to evaporate from the lungs during respiration (as oxygen is required for the metabolic process): overall, there is a net decrease in water.
Camels have a series of physiological adaptations that allow them to withstand long periods of time without any external source of water. Unlike other mammals, their red blood cells are oval rather than circular in shape. This facilitates the flow of red blood cells during dehydration and makes them better at withstanding high osmotic variation without rupturing when drinking large amounts of water: a 600 kg (1,300 lb) camel can drink 200 L (53 US gal) of water in three minutes.
Camels are able to withstand changes in body temperature and water consumption that would kill most other animals. Their temperature ranges from 34 °C (93 °F) at dawn and steadily increases to 40 °C (104 °F) by sunset, before they cool off at night again. Maintaining the brain temperature within certain limits is critical for animals; to assist this, camels have a rete mirabile, a complex of arteries and veins lying very close to each other which utilizes countercurrent blood flow to cool blood flowing to the brain. Camels rarely sweat, even when ambient temperatures reach 49 °C (120 °F). Any sweat that does occur evaporates at the skin level rather than at the surface of their coat; the heat of vaporization therefore comes from body heat rather than ambient heat. Camels can withstand losing 25% of their body weight to sweating, whereas most other mammals can withstand only about 12–14% dehydration before cardiac failure results from circulatory disturbance.
When the camel exhales, water vapor becomes trapped in their nostrils and is reabsorbed into the body as a means to conserve water. Camels eating green herbage can ingest sufficient moisture in milder conditions to maintain their bodies' hydrated state without the need for drinking.
The camels' thick coats insulate them from the intense heat radiated from desert sand; a shorn camel must sweat 50% more to avoid overheating. During the summer the coat becomes lighter in color, reflecting light as well as helping avoid sunburn. The camel's long legs help by keeping its body farther from the ground, which can heat up to 70 °C (158 °F). Dromedaries have a pad of thick tissue over the sternum called the pedestal. When the animal lies down in a sternal recumbent position, the pedestal raises the body from the hot surface and allows cooling air to pass under the body.
Camels' mouths have a thick leathery lining, allowing them to chew thorny desert plants. Long eyelashes and ear hairs, together with nostrils that can close, form a barrier against sand. If sand gets lodged in their eyes, they can dislodge it using their transparent third eyelid. The camels' gait and widened feet help them move without sinking into the sand.
The kidneys and intestines of a camel are very efficient at reabsorbing water. Camel urine comes out as a thick syrup, and camel feces are so dry, that they do not require drying when the Bedouins use them to fuel fires.
Camels' immune system differs from those of other mammals. Normally, the Y-shaped antibody molecules consist of two heavy (or long) chains along the length of the Y, and two light (or short) chains at each tip of the Y. Camels, in addition to these, also have antibodies made of only two heavy chains, a trait that makes them smaller and more durable. These "heavy-chain-only" antibodies, discovered in 1993, are thought to have developed 50 million years ago, after camelids split from ruminants and pigs.
The karyotypes of different camelid species have been studied earlier by many groups, but no agreement on chromosome nomenclature of camelids has been reached. A 2007 study flow sorted camel chromosomes, building on the fact that camels have 37 pairs of chromosomes (2n=74), and found that the karyotime consisted of one metacentric, three submetacentric, and 32 acrocentric autosomes. The Y is a small metacentric chromosome, while the X is a large metacentric chromosome.
According to molecular data, the New World and Old World camelids diverged 11 million years ago. In spite of this, these species can still hybridize and produce fertile offspring. The hybrid camel has one hump, though it has an indentation 4–12 cm (1.6–4.7 in) deep that divides the front from the back. The hybrid is 2.15 m (7 ft 1 in) at the shoulder and 2.32 m (7 ft 7 in) tall at the hump. It weighs an average of 650 kg (1,430 lb) and can carry around 400 to 450 kg (880 to 990 lb), which is more than either the dromedary or Bactrian can.
The cama is a camel–llama hybrid bred by scientists who wanted to see how closely related the parent species were. The scientists collected semen from a camel via an artificial vagina and inseminated a llama after stimulating ovulation with gonadotrophin injections. The cama has ears halfway between the length of camel and llama ears, no hump, longer legs than the llama, and partially cloven hooves. According to cama breeder Lulu Skidmore, cama have "the fleece of the llamas" and "the strength and patience of the camel". Like the mule, camas are sterile, despite both parents having the same number of chromosomes.
The earliest known camel, called Protylopus, lived in North America 40 to 50 million years ago (during the Eocene). It was about the size of a rabbit and lived in the open woodlands of what is now South Dakota. By 35 million years ago, the Poebrotherium was the size of a goat and had many more traits similar to camels and llamas. The hoofed Stenomylus, which walked on the tips of its toes, also existed around this time, and the long-necked Aepycamelus evolved in the Miocene.
The direct ancestor of all modern camels, Procamelus, existed in the upper Miocone and lower Pliocene. Around 3–5 million years ago, the North American Camelidae spread to South America via the Isthmus of Panama, where they gave rise to guanacos and related animals, and to Asia via the Bering land bridge. Surprising finds of fossil Paracamelus on Ellesmere Island beginning in 2006 in the high Canadian Arctic indicate the dromedary is descended from a larger, boreal browser whose hump may have evolved as an adaptation in a cold climate. This creature is estimated to have stood around nine feet tall.
The last camel native to North America was Camelops hesternus, which vanished along with horses, short-faced bears, mammoths and mastodons, ground sloths, sabertooth cats, and many other megafauna, coinciding with the migration of humans from Asia.
Most camels surviving today are domesticated. Along with many other megafauna in North America, the original wild camels were wiped out during the spread of Native Americans from Asia into North America, 12,000 to 10,000 years ago. The only wild camels left are the Bactrian camels of the Gobi Desert.
Like the horse, before their extinction in their native land, camels spread across the Bering land bridge, moving the opposite direction from the Asian immigration to America, to survive in the Old World and eventually be domesticated and spread globally by humans.
Dromedaries may have first been domesticated by humans in Somalia and southern Arabia, around 3,000 BC, the Bactrian in central Asia around 2,500 BC, as at Shar-i Sokhta (also known as the Burnt City), Iran.
Discussions concerning camel domestication in Mesopotamia are often related to mentions of camels in the Hebrew Bible. The International Standard Bible Encyclopedia: E-J for instance mentions that "In accord with patriarchal traditions, cylinder seals from Middle Bronze Age Mesopotamia showed riders seated upon camels."
Martin Heide's 2010 work on the domestication of the camel tentatively concludes that the bactrian camel was domesticated by at least the middle of the third millennium somewhere east of the Zagros Mountains, then moving into Mesopotamia, and suggests that mentions of camels "in the patriarchal narratives may refer, at least in some places, to the Bactrian camel." while noting that the camel is not mentioned in relationship to Canaan.
Recent excavations in the Timna Valley by Lidar Sapir-Hen and Erez Ben-Yosef discovered what may be the earliest domestic camel bones found in Israel or even outside the Arabian peninsula, dating to around 930 BCE. This garnered considerable media coverage as it was described as evidence that the stories of Abraham, Joseph, Jacob and Esau were written after this time.
The existence of camels in Mesopotamia but not in Israel is not a new idea. According to an article in Time Magazine, the historian Richard Bulliet wrote in his 1975 book "The Camel and the Wheel" that “the occasional mention of camels in patriarchal narratives does not mean that the domestic camels were common in the Holy Land at that period.” The archaeologist William F. Albright writing even earlier saw camels in the Bible as an anachronism. The official report by Sapir-Hen and Ben-Joseph notes that "The introduction of the dromedary camel (Camelus dromedarius) as a pack animal to the southern Levant signifies a crucial juncture in the history of the region; it substantially facilitated trade across the vast deserts of Arabia, promoting both economic and social change (e.g., Kohler 1984; Borowski 1998: 112-116; Jasmin 2005). This, together with the depiction of camels in the Patriarchal narrative, has generated extensive discussion regarding the date of the earliest domestic camel in the southern Levant (and beyond) (e.g., Albright 1949: 207; Epstein 1971: 558-584; Bulliet 1975; Zarins 1989; Köhler-Rollefson 1993; Uerpmann and Uerpmann 2002; Jasmin 2005; 2006; Heide 2010; Rosen and Saidel 2010; Grigson 2012). Most scholars today agree that the dromedary was exploited as a pack animal sometime in the early Iron Age (not before the 12th century BCE)" and concludes that "Current data from copper smelting sites of the Aravah Valley enable us to pinpoint the introduction of domestic camels to the southern Levant more precisely based on stratigraphic contexts associated with an extensive suite of radiocarbon dates. The data indicate that this event occurred not earlier than the last third of the 10th century BCE and most probably during this time. The coincidence of this event with a major reorganization of the copper industry of the region—attributed to the results of the campaign of Pharaoh Shoshenq I—raises the possibility that the two were connected, and that camels were introduced as part of the efforts to improve efficiency by facilitating trade."
By at least 1200 BC, the first camel saddles had appeared, and Bactrian camels could be ridden. The first saddle was positioned to the back of the camel, and control of the Bactrian camel was exercised by means of a stick. However, between 500–100 BC, Bactrian camels attained military use. New saddles, which were inflexible and bent, were put over the humps and divided the rider's weight over the animal. In the seventh century BC, the military Arabian saddle appeared, which improved the saddle design again slightly.
Camel cavalries have been used in wars throughout Africa, the Middle East, and into modern-day Border Security Force of India (though as of July 2012, the BSF has planned the replacement of camels with ATVs). The first use of camel cavalries was in the Battle of Qarqar in 853 BC. Armies have also used camels as freight animals instead of horses and mules.
In the East Roman Empire, the Romans used auxiliary forces known as dromedarii, whom they recruited in desert provinces. The camels were used mostly in combat because of their ability to scare off horses at close ranges (horses are afraid of the camels' scent), a quality famously employed by the Achaemenid Persians when fighting Lydia in the Battle of Thymbra.
19th and 20th centuries
- The United States Army established the U.S. Camel Corps, which was stationed in California in the late 19th century. One may still see stables at the Benicia Arsenal in Benicia, California, where they nowadays serve as the Benicia Historical Museum. Though the experimental use of camels was seen as a success (John B. Floyd, Secretary of War in 1858, recommended that funds be allocated towards obtaining a thousand more camels), the outbreak of the American Civil War saw the end of the Camel Corps: Texas became part of the Confederacy, and most of the camels were left to wander away into the desert.
- France created a méhariste camel corps in 1912 as part of the Armée d'Afrique in the Sahara in order to exercise greater control over the camel-riding Tuareg and Arab insurgents, as previous efforts to defeat them on foot had failed. The camel-mounted units remained in service until the end of French rule over Algeria in 1962.
- In 1916, the British created the Imperial Camel Corps. It was originally used to fight the Senussi, but was later used in the Sinai and Palestine Campaign in World War I. The Imperial Camel Corps comprised infantrymen mounted on camels for movement across desert, though they dismounted at battle sites and fought on foot. After July 1918, the Corps began to become run down, receiving no new reinforcements, and was formally disbanded in 1919.
- In World War I, the British Army also created the Egyptian Camel Transport Corps, which consisted of a group of Egyptian camel drivers and their camels. The Corps supported British war operations in Sinai, Palestine, and Syria by transporting supplies to the troops.
- The Somaliland Camel Corps was created by colonial authorities in British Somaliland in 1912; it was disbanded in 1944.
- Bactrian camels were used by Romanian forces during World War II in the Caucasian region.
- The Bikaner Camel Corps of British India fought alongside the British Indian Army in World Wars I and II.
- The Tropas Nómadas (Nomad Troops) were an auxiliary regiment of Sahrawi tribesmen serving in the colonial army in Spanish Sahara (today Western Sahara). Operational from the 1930s until the end of the Spanish presence in the territory in 1975, the Tropas Nómadas were equipped with small arms and led by Spanish officers. The unit guarded outposts and sometimes conducted patrols on camelback.
Camel milk is a staple food of desert nomad tribes and is sometimes considered a meal in and of itself; a nomad can live on only camel milk for almost a month. Camel milk is rich in vitamins, minerals, proteins, and immunoglobulins; compared to cow's milk, it is lower in fat and lactose, and higher in potassium, iron, and vitamin C. Bedouins believe the curative powers of camel milk are enhanced if the camel's diet consists of certain desert plants. Camel milk can readily be made into a drinkable yogurt, as well as butter or cheese, though the yields for cheese tend to be low.
Camel milk cannot be made into butter by the traditional churning method. It can be made if it is soured first, churned, and a clarifying agent is then added. Until recently, camel milk could not be made into camel cheese because rennet was unable to coagulate the milk proteins to allow the collection of curds. Developing less wasteful uses of the milk, the FAO commissioned Professor J.P. Ramet of the École Nationale Supérieure d'Agronomie et des Industries Alimentaires, who was able to produce curdling by the addition of calcium phosphate and vegetable rennet. The cheese produced from this process has low levels of cholesterol and is easy to digest, even for the lactose intolerant. The sale of camel cheese is limited owing to the small output of the few dairies producing camel cheese and the absence of camel cheese in local (West African) markets. Cheese imports from countries that traditionally breed camels are difficult to obtain due to restrictions on dairy imports from these regions.
A camel carcass can provide a substantial amount of meat. The male dromedary carcass can weigh 300–400 kg (661–882 lb), while the carcass of a male Bactrian can weigh up to 650 kg (1,433 lb). The carcass of a female dromedary weighs less than the male, ranging between 250 and 350 kg (550 and 770 lb). The brisket, ribs and loin are among the preferred parts, and the hump is considered a delicacy. The hump contains "white and sickly fat", which can be used to make the khli (preserved meat) of mutton, beef, or camel. Camel meat is reported to taste like coarse beef, but older camels can prove to be very tough, although camel meat becomes more tender the more it is cooked. The Abu Dhabi Officers' Club serves a camel burger mixed with beef or lamb fat in order to improve the texture and taste. In Karachi, Pakistan, some restaurants prepare nihari from camel meat. In Syria and Egypt, there are specialist camel butchers.
Camel meat has been eaten for centuries. It has been recorded by ancient Greek writers as an available dish at banquets in ancient Persia, usually roasted whole. The ancient Roman emperor Heliogabalus enjoyed camel's heel. Camel meat is still eaten in certain regions, including Eritrea, Somalia, Djibouti, Saudi Arabia, Egypt, Syria, Libya, Sudan, Ethiopia, Kazakhstan, and other arid regions where alternative forms of protein may be limited or where camel meat has had a long cultural history. Camel blood is also consumable, as is the case among pastoralists in northern Kenya, where camel blood is drunk with milk and acts as a key source of iron, vitamin D, salts and minerals. Camel meat is also occasionally found in Australian cuisine: for example, a camel lasagna is available in Alice Springs.
A 2005 report issued jointly by the Saudi Ministry of Health and the United States Centers for Disease Control and Prevention details cases of human bubonic plague resulting from the ingestion of raw camel liver.
Camel meat is halal for Muslims. However, according to some Islamic schools of thought, a state of impurity is brought on by the consumption of it. Consequently, these schools hold that Muslims must perform wudhu (ablution) before the next time they pray after eating camel meat.
According to ahadith collected by Bukhari and Muslim, Muhammad ordered a certain group of people to drink camel milk and urine as a medicine. However, according to Abū Ḥanīfa, the drinking of camel urine, while not forbidden (ḥaram), is disliked (makrūh) in Islam.
Nevertheless these shall ye not eat of them that only chew the cud, or of them that only part the hoof: the camel, because he cheweth the cud but parteth not the hoof, he is unclean unto you.—Leviticus 11:4
Distribution and numbers
There are around 14 million camels alive as of 2010, with 90% being dromedaries. Dromedaries alive today are domesticated animals (mostly living in the Horn of Africa, the Sahel, Maghreb, Middle East and South Asia). The Horn region alone has the largest concentration of camels in the world, where the dromedaries constitute an important part of local nomadic life. They provide nomadic people in Somalia (which has the largest camel herd in the world) and Ethiopia with milk, food, and transportation.
The Bactrian camel is, as of 2010, reduced to an estimated 1.4 million animals, most of which are domesticated. The only truly wild Bactrian camels, of which there are less than one thousand, are thought to inhabit the Gobi Desert in China and Mongolia.
The largest population of feral camels is in Australia. There are around 700,000 feral dromedary camels in central parts of Australia, descended from those introduced as a method of transport in the 19th and early 20th centuries. This population is growing about 8% per year. Representatives of the Australian government have culled more than 100,000 of the animals in part because the camels use too much of the limited resources needed by sheep farmers.
A small population of introduced camels, dromedaries and Bactrians, wandered through Southwest United States after having been imported in the 1800s as part of the U.S. Camel Corps experiment. When the project ended, they were used as draft animals in mines and escaped or were released. Twenty-five U.S. camels were bought and imported to Canada during the Cariboo Gold Rush.
- "Camelus gigas". ZipcodeZoo. BayScience Foundation, Inc. Retrieved 7 December 2012.
- Worboys, Graeme L.; Francis, Wendy L.; Lockwood, Michael (30 March 2010). Connectivity Conservation Management: A Global Guide. Earthscan. p. 142. ISBN 9781844076048.
- Falconer, Hugh (1868). Palæontological Memoirs and Notes of the Late Hugh Falconer: Fauna antiqua sivalensis. R. Hardwicke. p. 231.
- "camel". The New Oxford American Dictionary (2nd ed.). Oxford University Press, Inc. 2005.
- Herper, Douglas. "camel". Online Etymology Dictionary. Retrieved 28 November 2012.
- "llama". Century Dictionary and Cyclopedia. wordnik. Retrieved 28 November 2012.
- Bornstein, Set (2010). "Important ectoparasites of Alpaca (Vicugna pacos)". Acta Veterinaria Scandinavica 52 (Suppl 1): S17. doi:10.1186/1751-0147-52-S1-S17. ISSN 1751-0147. Retrieved 28 November 2012.
- "Arabian (Dromedary) Camel". National Geographic. National Geographic Society. Retrieved 25 November 2012.
- "Bactrian Camel: Camelus bactrianus". National Geographic. Retrieved 28 November 2012.
- "The amazing characteristics of the camels". Camello Safari. Retrieved 26 November 2012.
- "How Fast Can Camels Run and How Long Can They Run For?". Big Site of Amazing Facts. Retrieved 29 November 2012.
- Abu-Zidana, Fikri M.; Eida, Hani O.; Hefnya, Ashraf F.; Bashira, Masoud O.; Branickia, Frank (18 December 2011). "Camel bite injuries in United Arab Emirates: A 6 year prospective study". Injury (Epub ahead of printdoi:10.1016/j.injury.2011.10.039. PMID 22186231. "The male mature camel has a specialized inflatable diverticulum of the soft palate called the "Dulla". and During rutting the Dulla enlarges on filling with air from the trachea until it hangs out of the mouth of the camel and comes to resemble a pink ball. This occurs in only the one-humped camel. Copious saliva turns to foam covering the mouth as the male gurgles and makes metallic sounds. [6 cites to 5 references omitted]") 43 (9): 1617.
- Two Male Camels Fighting Over One Female.
- Mukasa-Mugerwa, E. (1981 pages=1, 3, 20–21, 65, 67–68). The Camel (Camelus Dromedarius): A Bibliographical Review. International Livestock Centre for Africa Monograph 5. Ethiopia: International Livestock Centre for Africa. Check date values in:
- "Bactrian & Dromedary Camels". Factsheets. San Diego Zoo Global Library. March 2009. Retrieved 4 December 2012.
- Rice, Jocelyn (5 January 2009). "20 Things You Didn't Know About... Fat | Obesity". DISCOVER Magazine. Retrieved 7 March 2009.
- Roberts, Michael Bliss Vaughan (1986). Biology: A Functional Approach. Nelson Thornes. pp. 234–235, 241. ISBN 9780174480198.
- Vann Jones, Kerstin. "What secrets lie within the camel's hump?". Sweden: Lund University. Retrieved 7 January 2008.
- Rastogi, S. C. (1971). Essentials Of Animal Physiology. New Age International. pp. 180–181. ISBN 9788122412796.
- Bernstein, William J. (2009). A Splendid Exchange: How Trade Shaped the World. Grove Press. p. 56. ISBN 9780802144164.
- Eitan, A; Aloni, B; Livne, A (1976). "Unique properties of the camel erythrocyte membraneII. Organization of membrane proteins". Biochimica et Biophysica Acta (BBA) – Biomembranes 426: 647–58. doi:10.1016/0005-2736(76)90129-2.
- "Dromedary". Hannover Zoo. Archived from the original on 25 October 2005. Retrieved 8 January 2008.
- Halpern, E. Anette (1999). "Camel". In Mares; Michael A. Deserts. University of Oklahoma Press. pp. 96–97. ISBN 9780806131467.
- Inside Nature's Giants. Channel 4 (UK) documentary. Transmitted 30 August 2011
- Lewis, Paul (12 July 1981). "A Pilgrimage To A Mystic's Hermitage In Algeria". The New York Times. Retrieved 7 March 2009.
- "Camels, llamas and alpacas". A manual for primary animal health care worker. FAO Animal Health Manual. FAO Agriculture and Consumer Protection. 1994. ISSN 1020-5187.
- Schmidt-Nielsen, K. (1964). Desert Animals: Physiological Problems of Heat and Water. New York: Oxford University Press. Cited in "Coat of fur on the camel". Temperature and Water Relations in Dromedary Camels (Camelus dromedarius). Davidson College.
- Bronx Zoo. "Camel Adaptations" (Flash). Wildlife Conservation Society. Retrieved 29 November 2012.
- Rundel, Philip Wilson; Gibson, Arthur C. (30 September 2005). "Adaptations of Mojave Desert Animals". Ecological Communities And Processes in a Mojave Desert Ecosystem: Rock Valley, Nevada. Cambridge University Press. p. 130. ISBN 9780521021418.
- "Camels — Old World Camels". Science Encyclopedia. Net Industries. Retrieved 29 November 2012.
- Silverstein, Alvin; Silverstein, Virginia B; Silverstein, Virginia; Silverstein Nunn, Laura (2008). Adaptation. Twenty-First Century Books. pp. 42–43. ISBN 9780822534341.
- Davidson, Alan; Davidson, Jane (15 October 2006). Jaine, Tom, ed. The Oxford Companion to Food (2nd ed.). Oxford University Press, USA. pp. 68, 129, 266, 762. ISBN 0192806815.
- "Kidneys and Concentrated Urine". Temperature and Water Relations in Dromedary Camels (Camelus dromedarius). Davidson College.
- "Fun facts about the Camel". The Jungle Store. Retrieved 3 December 2012.
- Fedewa, Jennifer L. (2000). "Camelus bactrianus". Animal Diversity Web. University of Michigan Museum of Zoology. Retrieved 4 December 2012.
- Koenig, R. (2007). "VETERINARY MEDICINE: 'Camelized' Antibodies Make Waves". Science 318 (5855): 1373. doi:10.1126/science.318.5855.1373. PMID 18048665.
- Taylor, K.M.; Hungerford, D.A.; Snyder, R.L.; Ulmer, Jr., F.A. (1968). "Uniformity of karyotypes in the Camelidae". Cytogenetic and Genome Research 7: 8–15. doi:10.1159/000129967.
- Koulischer, L; Tijskens, J; Mortelmans, J (1971). "Mammalian cytogenetics. IV. The chromosomes of two male Camelidae: Camelus bactrianus and Lama vicugna.". Acta zoologica et pathologica Antverpiensia 52: 89–92. PMID 5163286.
- Bianchi, N. O.; Larramendy, M. L.; Bianchi, M. S.; Cortés, L. (1986). "Karyological conservatism in South American camelids". Experientia 42: 622–4. doi:10.1007/BF01955563.
- Bunch, Thomas D.; Foote, Warren C.; Maciulis, Alma (1985). "Chromosome banding pattern homologies and NORs for the Bactrian camel, guanaco, and llama". Journal of Heredity 76 (2): 115–8.
- O'Brien, Stephen J.; Menninger, Joan C.; Nash, William G., eds. (2006). Atlas of Mammalian Chromosomes. New York: Wiley-Liss. p. 547. ISBN 978-0-471-35015-6.
- Di Berardino, D.; Nicodemo, D.; Coppola, G.; King, A.W.; Ramunno, L.; Cosenza, G.F.; Iannuzzi, L.; Di Meo, G.P. et al. (2006). "Cytogenetic characterization of alpaca (Lama pacos, fam. Camelidae) prometaphase chromosomes". Cytogenetic and Genome Research 115 (2): 138–44. doi:10.1159/000095234. PMID 17065795.
- Balmus, Gabriel; Trifonov, Vladimir A.; Biltueva, Larisa S.; O’Brien, Patricia C.M.; Alkalaeva, Elena S.; Fu, Beiyuan; Skidmore, Julian A.; Allen, Twink et al. (2007). "Cross-species chromosome painting among camel, cattle, pig and human: further insights into the putative Cetartiodactyla ancestral karyotype". Chromosome Research 15 (4): 499–515. doi:10.1007/s10577-007-1154-x. PMID 17671843.
- Stanley, H. F.; Kadwell, M.; Wheeler, J. C. (1994). "Molecular Evolution of the Family Camelidae: A Mitochondrial DNA Study". Proceedings of the Royal Society B: Biological Sciences 256: 1–6. doi:10.1098/rspb.1994.0041.
- Skidmore, J. A.; Billah, M.; Binns, M.; Short, R. V.; Allen, W. R. (1999). "Hybridizing Old and New World camelids: Camelus dromedarius x Lama guanicoe". Proceedings of the Royal Society B: Biological Sciences 266: 649–56. doi:10.1098/rspb.1999.0685.
- Potts, Danel. "Bactrian Camels and Bactrian-Dromedary Hybrids". Silkroad 3 (1).
- "Meet Rama the cama ...". BBC. 21 January 1998. Retrieved 29 November 2012.
- Fahmy, Miral (21 March 2002). "'Cama' camel/llama hybrids born in UAE research centre". Science in the News. The Royal Society of New Zealand. Retrieved 28 November 2012.
- Campbell, Duncan (15 July 2002). "Bad karma for cross llama without a hump". London: The Guardian. Retrieved 2 March 2009.
- "Joy for world’s first camel and llama cross". Metro UK. 6 April 2008. Retrieved 29 November 2012.
- Harington, C. R. (June 1997). "Ice Age Yukon and Alaskan Camels". Yukon Beringia Interpretive Centre. Government of Yukon, Department of Tourism and Culture, Museums Unit. Retrieved 3 December 2012.
- Bernstein, William J. (6 May 2009). A Splendid Exchange: How Trade Shaped the World. Grove Press. pp. 54–55. ISBN 9780802144164.
- North Dakota Industrial Commission Department of Mineral Resources. "Poebrotherium". North Dakota State Government. Retrieved 3 December 2012.
- "Fossil camel skull (Poebrotherium sp.)". Science Buzz. Science Museum of Minnesota. January 2004. Retrieved 3 December 2012.
- Kindersley, Dorling (2 June 2008). "Camels". Encyclopedia of Dinosaurs and Prehistoric Life. Penguin. pp. 266–7. ISBN 9780756682415.
- Singh; Tomar. Evolutionary Biology (8th revised ed.). New Delhi: Rastogi Publications. p. 334. ISBN 9788171336395.
- Allen, Kate Camel fossils discovered in Canada’s Arctic shed light on animal’s evolution, Toronto Star. 5 March 2013. Retrieved 5 March 2013.
- Rybczynski, Natalia; John C. Gosse, C. Richard Harington, Roy A. Wogelius, Alan J. Hidy & Mike Buckley (March 5, 2013). "Mid-Pliocene warm-period deposits in the High Arctic yield insight into camel evolution". Nature Communications. doi:10.1038/ncomms2516. Retrieved 6 March 2013.
- Gates, Sara (6 March 2013). "Camel Fossils Found In Arctic Suggest Ancient Creatures Roamed Region 3.5 Million Years Ago". Huffington Post.
- MacPhee, Ross D. E.; Sues, Hans-Dieter (30 June 1999). Extinctions in Near Time: Causes, Contexts, and Consequences. Springer. pp. 18, 20, 26. ISBN 9780306460920.
- Walker, Matt (22 July 2009). "Wild camels 'genetically unique'". Earth News (BBC). Retrieved 4 December 2012.
- Scarre, Chris (15 September 1993). Smithsonian Timelines of the Ancient World. London: D. Kindersley. p. 176. ISBN 978-1-56458-305-5. "Both the dromedary (the seven-humped camel of Arabia) and the Bactrian camel (the two-humped camel of Central Asia) had been domesticated since before 2000 BC."
- Bulliet, Richard (20 May 1990) . The Camel and the Wheel. Morningside Book Series. Columbia University Press. p. 183. ISBN 978-0-231-07235-9. "As has already been mentioned, this type of utilization [camels pulling wagons] goes back to the earliest known period of two-humped camel domestication in the third millennium B.C."—Note that Bulliet has many more references to early use of camels
- Camels were first domesticated in Somalia according to this new Archaeology book http://books.google.co.uk/books?id=khR0apPid8gC&pg=PA120&redir_esc=y#v=onepage&q&f=false
- Hirst, K. Kris. "Camels". About.com Archaeology. Retrieved 6 February 2014.
- Bromiley, ed. Geoffrey W. (1982). E - J. (Fully rev., [Nachdr.]. ed.). Grand Rapids, Mich.: Eerdmans. p. 442. ISBN 978-0802837820.
- Bulliet, Richard W. (1990). The camel and the wheel (Morningside ed. ed.). New York: Columbia university press. pp. 63, 64. ISBN 978-0231072342.
- Heide, Martin. 2011 “The Domestication of the Camel: Biological, Archaeological and Inscriptional Evidence from Mesopotamia, Egypt, Israel and Arabia, and Literary Evidence from the Hebrew Bible.” Ugarit-Forschungen 42: 367-68.
- Hasson, Nir (Jan 17, 2014). "Hump stump solved: Camels arrived in region much later than biblical reference". Haaretz. Retrieved 30 January 2014.
- Sapir-Hen, Lidar; Erez Ben-Yosef (2013). "The Introduction of Domestic Camels to the Southern Levant: Evidence from the Aravah Valley". Tel Aviv 40: 277–285. doi:10.1179/033443513x13753505864089. Retrieved 16 February 2014.
- Dias, Elizabeth (Feb 11, 2014). "The Mystery of the Bible’s Phantom Camels". Time. Retrieved 22 February 2014.
- Heide, Martin. 2011 “The Domestication of the Camel: Biological, Archaeological and Inscriptional Evidence from Mesopotamia, Egypt, Israel and Arabia, and Literary Evidence from the Hebrew Bible.” Ugarit-Forschungen 42: 368.
- Fagan, Brian M, ed. (2004). "Transportation". The Seventy Great Inventions of the Ancient World. London: Thames & Hudson. pp. 150–152. ISBN 0-500-05130-5.[page needed]
- Gabriel, Richard A. (2007). Soldiers' Lives Through History: The Ancient World. Greenwood Publishing Group. p. xvi. ISBN 9780313333484.
- Bhatia, Vimal (23 July 2012). "BSF to ditch camels to ride sand scooters". The Times of India. Retrieved 4 December 2012.
- Gann, Lewis Henry; Duignan, Peter (1972). Africa and the World: An Introduction to the History of Sub-Saharan Africa from Antiquity to 1840. University Press of America. p. 156. ISBN 9780761815204. "The camel was acclimatized in Egypt long before the time of Christ and was subsequently adopted by the Berbers of the desert, who used camel cavalry to fight the Romans. The Berbers spread the use of the camel across the Sahara."
- Fleming, Walter L. (February 1909). "Jefferson Davis's Camel Experiment". The Popular Science Monthly 74 (8) (Bonnier Corporation). p. 150. ISSN 0161-7370. "Other trials of the camel were made in 1859 by Major D. H. Vinton, who used twenty-four of them in carrying burdens for a surveying party...All in all, he concluded, the camel was much superior to the mule."
- Mantz, John (20 April 2006). "Camels in the Cariboo". In Basque, Garnet. Frontier Days in British Columbia. Heritage House Publishing Co. pp. 51–54. ISBN 9781894384018.
- Southern, Pat (1 October 2007). The Roman Army: A Social and Institutional History. Oxford University Press. p. 123. ISBN 9780195328783.
- Nicolle, David (26 March 1991). The Desert Frontier. Rome's Enemies 5 (illustrated, reprint ed.). Osprey Publishing. p. 4. ISBN 9781855321663. "Nevertheless the military prowess of desert peoples impressed the Romans, who recruited large numbers as auxiliary cavalry and archers. In addition to providing the Roman Army with its best archers, the Easterners (largely Arabs but generally known as 'Syrians') served as Rome's most effective dromedarii or camel-mounted troops."
- Herodotus (440 BC). The History of Herodotus. Rawlinson, George (trans.). Retrieved 4 December 2012. "He collected together all the camels that had come in the train of his army to carry the provisions and the baggage, and taking off their loads, he mounted riders upon them accoutred as horsemen. These he commanded to advance in front of his other troops against the Lydian horse; behind them were to follow the foot soldiers, and last of all the cavalry. When his arrangements were complete, he gave his troops orders to slay all the other Lydians who came in their way without mercy, but to spare Croesus and not kill him, even if he should be seized and offer resistance. The reason why Cyrus opposed his camels to the enemy's horse was because the horse has a natural dread of the camel, and cannot abide either the sight or the smell of that animal. By this stratagem he hoped to make Croesus's horse useless to him, the horse being what he chiefly depended on for victory. The two armies then joined battle, and immediately the Lydian war-horses, seeing and smelling the camels, turned round and galloped off; and so it came to pass that all Croesus's hopes withered away." Check date values in:
- "Cameliers and camels at war". New Zealand History online. History Group of the New Zealand Ministry for Culture and Heritage. 30 August 2009. Retrieved 5 December 2012.
- "The Posts at Benicia". The California State Military Museum. Retrieved 4 December 2012.
- "Vitrine N° 108 (partie droite): LES PELOTONS MEHARISTES" (in French). Musée de l'infanterie. Retrieved 5 December 2012.
- Hall, Bruce S. (6 June 2011). A History of Race in Muslim West Africa, 1600-1960. Cambridge University Press. p. 143. ISBN 9781107002876.
- Guillaume, Philippe (16 June 2012). "L’incroyable épopée des méharistes français" [The incredible epic of the French méharistes]. BDSphère (in French). Retrieved 5 December 2012.
- Woodward, David R. (2006). Hell in the Holy Land: World War I in the Middle East. University Press of Kentucky. pp. 36, 39, 43, 56, 133. ISBN 9780813123837.
- Murray, Archibald James (1920). Sir Archibald Murray's despatches (June 1916–June 1917). J.M. Dent. p. 123. "A great deal of the work of supplying the troops on both fronts has been done by the Camel Transport Corps"
- McGregor, Andrew James (30 May 2006). A Military History of Modern Egypt: From the Ottoman Conquest to the Ramadan War. Greenwood Publishing Group. p. 215. ISBN 9780275986018.
- Federal Research Division (30 June 2004). Somalia a Country Study. Area handbook series (3rd ed.). Kessinger Publishing. pp. 230–231. ISBN 9781419147999.
- "Romanian troops using camels". WWII in Color.
- Jupiter Infomedia Ltd (28 November 2012). "Bikaner Camel Corps, Presidency Armies in British India". IndiaNetzone.
- Shelley, Toby (December 2007). "Sons of the Clouds". Red Pepper (Location). Retrieved 6 December 2012.
- Hermandad de Veteranos Tropas Nómadas del Sáhara. "Los Medios" [The Means]. Historia: Agrupación de Tropas Nómadas (in Spanish). Retrieved 6 December 2012.
- Bulliet, Richard W. (1975). The Camel and the Wheel. Columbia University Press. pp. 23, 25, 28, 35–36, 38–40. ISBN 9780231072359.
- "Camel Milk". Milk & Dairy Products. FAO's Animal Production and Health Division. 25 September 2012. Retrieved 6 December 2012.
- Shamsia, S. M. (July 2009). "Nutritional and therapeutic properties of camel and human milks". International Journal of Genetics and Molecular Biology 1 (2): 52–58.
- "Fresh from your local drome'dairy'?". Food and Agriculture Organization. 6 July 2001.
- Yagil. Milk Products and Their Uses. "The belief among the Bedouin of the Sinai Peninsula, is that any internal disease can be cured by drinking camel milk. The milk is said to be of such a strength, and to have such health-giving properties, that all the bacteria are driven from the body. This said to be true only for camels that eat certain shrubs and bushes. The shrubs and bushes are, themselves, used in the preparation of medicines. However, camels which eat straw are said to lose this ability."
- Ramet. Camel milk and cheese making.
- Ramet. Methods of processing camel milk into cheese.
- Young, Philippa. "In Mongolian the Word 'Gobi' Means 'Desert'". Retrieved 6 December 2012. "As evening approaches we are offered camel meat boats, dumplings stuffed with a finely chopped mixture of meat and vegetables, followed by camel milk tea and finally, warm fresh camel's milk to aid digestion and help us sleep."
- Associated Press (16 November 2003). "Camel cheese could enrich Sahara Desert herder". The Augusta Chronicle (Morris Communications LLC). Retrieved 7 December 2012.
- "Netherlands' 'crazy' camel farmer". BBC. 5 November 2011. Retrieved 7 November 2011.
- Yagil. Camels Products Other Than Milk.
- Madame Guinaudeau (2003). Traditional Moroccan Cooking: Recipes from Fez. London: Serif. ISBN 1-897959-43-5.
- Rubenstein, Dustin (23 July 2010). "How to Cook Camel". The New York Times. Retrieved 7 December 2012. "He cut the pieces very small and cooked them for a long time. I decided to try something a bit different the following night and cut the pieces a bit bigger and cooked them for less time, as I like my meat rarer than he does. This was a bad idea. It seems that the more you cook camel, the more tender it becomes. So we had what amounted to two pounds or more of rubber for dinner that night."
- Arthur, Rick (4 January 2012). "The Instant Expert: camels, the ships of the desert". The National (UAE: Abu Dhabi Media). "As the meat can be dry, however, the Abu Dhabi Officer's Club, for one, serves camel burger with beef or lamb fat mixed in, improving texture and taste."
- Jasra, Abdel Wahid; Isani, G. B.; Camel Applied Research and Development Network (2000). Socio-economics of camel herders in Pakistan. The Camel Applied Research and Development Network. p. 164.
- Anyone for camel meat? One hump or two?The Guardian, Word of Mouth
- Sherwood, Andy (17 September 2012). "Camel burgers in Abu Dhabi". Time Out Abu Dhabi. Retrieved 7 December 2012.
- Webster, George (9 February 2010). "Dubai diners flock to eat new 'camel burger'". CNN World (CNN). Retrieved 7 December 2012.
- Bin Saeed, Abdulaziz A.; Al-Hamdan, Nasser A.; Fontaine, Robert E. (2005). "Plague from eating raw camel liver". Emerging Infectious Diseases 11 (9): 1456–7. doi:10.3201/eid1109.050081. PMC 3310619. PMID 16229781.
- "Book 1, Number 0184". Purification (Kitab Al-Taharah). Partial Translation of Sunan Abu-Dawud, Book 1. Center for Muslim-Jewish Engagement. Archived from the original on 16 July 2011. Retrieved 25 December. "Narrated Al-Bara' ibn Azib: The Messenger of Allah (peace_be_upon_him) was asked about performing ablution after eating the flesh of the camel. He replied: Perform ablution, after eating it. He was asked about performing ablution after eating meat. He replied: Do not perform ablution after eating it. He was asked about saying prayer in places where the camels lie down. He replied: Do not offer prayer in places where the camels lie down. These are the places of Satan. He was asked about saying prayer in the sheepfolds. He replied: You may offer prayer in such places; these are the places of blessing." Check date values in:
- "Punishment of Disbelievers at War with Allah and His Apostle: Volume 8, Book 82, Hadith 794". Sahih Bukhari. Translated by M. Muhsin Khan.
- "The Book Pertaining to the Oath, for Establishing the Responsibility of Murders, Fighting, Requital Book 16 Number 4130–4132". Sahih Muslim. Translated by Abdul Hamid Siddiqui.
- Williams, John Alden (1994). The Word of Islam. University of Texas Press. p. 98. ISBN 9780292790766.
- Heinemann, Moshe. "Cholov Yisroel: Does a Neshama Good". Kashrus Kurrents. Star-K. Retrieved 7 December 2012.
- Leviticus 11:4, King James Version (Oxford Standard, 1769)
- Dolby, Karen (10 August 2010). You Must Remember This: Easy Tricks & Proven Tips to Never Forget Anything, Ever Again. Random House Digital, Inc. p. 170. ISBN 9780307716255.
- Abokor, Axmed Cali (1987). The Camel in Somali Oral Tradition. Nordic Africa Institute. pp. 7, 10–11. ISBN 9789171062697.
- "Drought threatening Somali nomads, UN humanitarian office says". UN News Centre. 14 November 2003. Retrieved 7 December 2012. "A four-year drought is threatening the lives of Somali nomads, and those of the camel herds on which they depend for transportation and milk"
- Farah, K. O.; Nyariki, D. M.; Ngugi, R. K.; Noor, I. M.; Guliye, A. Y. (2004). "The Somali and the Camel: Ecology, Management and Economics". Anthropologist 6 (1): 45–55. "Somali pastoralists are a camel community...There is no other community in the world where the camel plays such a pivotal role in the local economy and culture as in the Somali community. According to the UN Food and Agriculture Organization (FAO, 1979) estimates, there are approximately 15 million dromedary camels in the world" Plain text version.
- "Bactrian Camel". Denver Zoo. Retrieved 7 December 2012.
- Hare, J. "Camelus ferus". IUCN Redlist. International Union for Conservation of Nature and Natural Resources. Retrieved 7 December 2012.
- Saalfeld, W.K.; Edwards, GP (2008). "Ecology of feral camels in Australia" (DKCRC Report 47). Managing the impacts of feral camels in Australia: a new way of doing business. Alice Springs: Desert Knowledge Cooperative Research Centre. ISBN 1-74158-094-3. ISSN 1832-6684.
- Pople, A. R.; McLeod, S. R. (2010). "Demography of feral camels in central Australia and its relevance to population control". The Rangeland Journal 32: 11. doi:10.1071/RJ09053.
- Tsai, Vivian (14 September 2012). "Australia Culls 100,000 Feral Camels To Limit Environmental Damage, Many More Will Be Killed". U.S. Edition. International Business Times. Archived from the original on 1 November 2012. Retrieved 1 November 2012.
- Ramet, J. P. (2011). The technology of making cheese from camel milk (Camelus dromedarius). FAO Animal Production and Health Paper. Rome: Food and Agriculture Organization of the United Nations. ISBN 92-5-103154-1. ISSN 0254-6019. OCLC 476039542. Retrieved 6 December 2012.
- Vannithone, S.; Davidson, A. (1999). "Camel". The Oxford companion to food. Oxford Oxfordshire: Oxford University Press. p. 127. ISBN 0-19-211579-0.
- Camels and Camel Milk. Report Issued by FAO, United Nations. (1982)
- Wilson, R.T. (1984). The camel. New York: Longman. ISBN 0-582-77512-4.
- Yagil, R. (1982). Camels and Camel Milk. FAO Animal Production and Health Paper 26. Rome: Food And Agriculture Organization Of The United Nations. ISBN 92-5-101169-9. ISSN 0254-6019.
- Gilchrist, W. (1851). A Practical Treatise on the Treatment of the Diseases of the Elephant, Camel & Horned Cattle: with instructions for improving their efficiency; also, a description of the medicines used in the treatment of their diseases; and a general outline of their anatomy'. Calcutta: Military Orphan Press.
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