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Thursday, March 19, 2015

American bison


From Wikipedia, the free encyclopedia

American bison
Temporal range: Pleistocene to present
American bison k5680-1.jpg
B. b. bison
Alternative image
Historic drawing
Bison call audio
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Superorder: Ungulata
Order: Artiodactyla
Family: Bovidae
Subfamily: Bovinae
Genus: Bison
Species: B. bison
Binomial name
Bison bison
(Linnaeus, 1758)
Subspecies
B. b. athabascae
B. b. bison
Bison bison map.svg
Synonyms
Bos americanus
Bos bison
Bison americanus
Bison bison montanae

The American bison (Bison bison), also commonly known as the American buffalo, is a North American species of bison that once roamed the grasslands of North America in massive herds, became nearly extinct by a combination of commercial hunting and slaughter in the 19th century and introduction of bovine diseases from domestic cattle, and has made a recent resurgence largely restricted to a few national parks and reserves. Their historical range roughly comprised a triangle between the Great Bear Lake in Canada's far northwest, south to the Mexican states of Durango and Nuevo León, and east to the Atlantic Seaboard of the United States (nearly to the Atlantic tidewater in some areas) from New York to Georgia and per some sources down to Florida. Bison were seen in North Carolina near Buffalo Ford on the Catawba River as late as 1750.[2][3][4]

Two subspecies or ecotypes have been described: the plains bison (Bison bison bison), smaller in size and with a more rounded hump, and the wood bison (Bison bison athabascae)—the larger of the two and having a taller, square hump.[5][6][7][8][9][10] Furthermore, it has been suggested that the plains bison consists of a northern (Bison bison montanae) and a southern subspecies, bringing the total to three.[8] However, this is generally not supported. The wood bison is one of the largest wild species of bovid in the world, surpassed by only the Asian gaur and wild water buffalo. It is the largest extant land animal in the Americas.

Description


Adult male (farthest) and adult female (closest) with a background of rich autumn colors, in Yellowstone National Park

A bison has a shaggy, long, dark brown winter coat, and a lighter weight, lighter brown summer coat. As is typical in ungulates, the male bison are slightly larger than the female and, in some cases, can be considerably heavier. Plains bison are often in the smaller range of sizes, and Wood bison in the larger range. Head-and-body length ranges from 2 to 3.5 m (6.6 to 11.5 ft) long, the tail adding 30 to 91 cm (12 to 36 in). Shoulder height in the species can range from 152 to 186 cm (60 to 73 in). Weight can range from 318 to 907 kg (701 to 2,000 lb)[11] The heaviest wild bull ever recorded weighed 1,270 kg (2,800 lb).[12] When raised in captivity and farmed for meat, the bison can grow unnaturally heavy and the largest semi-domestic bison weighed 1,724 kg (3,801 lb).[11] The heads and forequarters are massive, and both sexes have short, curved horns that can grow up to 2 feet (61 cm) long, which they use in fighting for status within the herd and for defense.

Calf

Bison are herbivores, grazing on the grasses and sedges of the North American prairies. Their daily schedule involves two-hour periods of grazing, resting and cud chewing, then moving to a new location to graze again. Bison mate in August and September; gestation is 285 days. A single reddish-brown calf nurses until the next calf is born. If the cow is not pregnant, a calf will nurse for 18 months. At three years of age, bison cows are mature enough to produce a calf. Bison bulls of that age may try to mate with cows, but if more mature bulls are present, they may not be able to compete until they reach five years of age. Bison have a life expectancy of approximately 15 years in the wild and up to 25 years in captivity.

For the first two months of life, calves are lighter in color than mature bison. One very rare condition is the white buffalo, in which the calf turns entirely white. White bison are considered sacred by many Native Americans.

Name

The term "buffalo" is sometimes considered to be a misnomer for this animal, and could be confused with two "true buffalo", the Asian water buffalo and the African buffalo. However, "bison" is a Greek word meaning ox-like animal, while "buffalo" originated with the French fur trappers who called these massive beasts bœufs, meaning ox or bullock—so both names, "bison" and "buffalo", have a similar meaning. The name "buffalo" is listed in many dictionaries as an acceptable name for American buffalo or bison. In reference to this animal, the term "buffalo", dates to 1625 in North American usage when the term was first recorded for the American mammal.[13] It thus has a much longer history than the term "bison", which was first recorded in 1774.[citation needed] The American bison is very closely related to the wisent or European bison.

Skulls of European bison (left) and American bison (right)

Differences from European bison

Although they are superficially similar, the American and European bison exhibit a number of physical and behavioral differences. Adult American bison are slightly heavier on average due to their less rangy build, and have shorter legs, which render them slightly shorter at the shoulder.[14] American bison tend to graze more, and browse less than their European cousins, due to their necks being set differently. Compared to the nose of the American bison, that of the European species is set farther forward than the forehead when the neck is in a neutral position. The body of the American bison is hairier, though its tail has less hair than that of the European bison. The horns of the European bison point forward through the plane of its face, making it more adept at fighting through the interlocking of horns in the same manner as domestic cattle, unlike the American bison which favors charging.[15] American bison are more easily tamed than their European cousins, and breed more readily with domestic cattle.[16]

Evolution

The bovine family (taurids and bisonids) diverged from the common ancestral line with water buffalo and African buffalo about 5 to 10 million years ago.[17] Thereafter, the family lineage of bison and taurine cattle does not appear to be a straight forward "tree" structure as is often depicted in much evolution, because there is evidence of interbreeding and crossbreeding between different species and members within this family, even many millions of years after their ancestors separated into different species. This cross breeding was not sufficient to conflate the different species back together, but it has resulted in unexpected relationships between many members of this group, such as Yak being related to American bison, when such relationships would otherwise not be apparent.
A 2003 study of mitochondrial DNA indicated four distinct maternal lineages in tribe Bovini:
  1. Taurine cattle and zebu,
  2. Wisent (European bison),
  3. American bison and yak,[18] and
  4. Banteng, gaur, and gayal.
However, Y chromosome analysis associated wisent and American bison.[19] An earlier study using amplified fragment length polymorphism (AFLP) fingerprinting showed a close association of wisent and American bison and probably with yak, but noted that the interbreeding of Bovini species made determining relationships problematic.[20] It is shown, however, the wisent may have emerged by species divergence initiated by the introgression of bison bulls in a separate ancestral species.[21]

"Last of the Canadian Bisons", 1902, photograph: Steele and Company

The steppe bison (Bison priscus) diverged from the lineage that led to cattle (Bos taurus) approximately 2 to 5 million years ago. The bison genus is clearly in the fossil record by 2 million years ago.[22] The steppe bison spread across Eurasia and was the bison that was pictured in the ancient cave paintings of Spain and Southern France
The European bison or wisent arose from the steppe bison, without fossil evidence of other ancestral species between the steppe bison and the European bison, though the European bison might have arisen from the lineage that led to American bison if that lineage backcrossed with the steppe bison. Again, the web of relationships is confusing, but there is some evidence that the European bison is descended from bison that had migrated from Asia to North America, and then back to Europe, where they crossbred with existing steppe bison.[22]

At one point, some steppe bison cross bred with the ancestors of the modern yak. After that cross breeding, a population of steppe bison (Bison priscus) crossed the Bering Land Bridge to North America. There is evidence of multiple crossings of bison to and from Asia starting before 500,000 years ago and continuing until at least 220,000 years ago. The steppe bison spread through the northern parts of North America and steppe bison lived in Eurasia until approximately 11,000 years ago[23] and North America until 4,000 to 8,000 years ago.[22]

Bison latifrons (giant bison or longhorn bison) is thought to have evolved in midcontinent North America from Bison priscus, after the steppe bison crossed into North America.[24][25][26] Giant bison (Bison latifrons) appeared in the fossil record approximately 500,000 years ago.[22] B. latifrons was one of many species of North American megafauna which became extinct during the Quaternary extinction event. It is thought to have disappeared some 21,000–30,000 years ago, during the late Wisconsin glaciation.[27]

The Bison latifrons (giant bison or longhorn bison) species was replaced by the smaller Bison antiquus. Bison antiquus appeared in the North American fossil record approximately 250,000 years ago.[28] Bison antiquus in turn evolved into the Bison occidentalis, then into the yet smaller Bison bison—the modern American bison—some 5,000 to 10,000 years ago.[29][30] Some researchers consider Bison occidentalis to be a sub-species of Bison antiquus.[31]

Pile of American bison skulls to be used for fertilizer in the mid-1870s

During the population bottleneck, after the great slaughter of American bison during the 1800s, the number of bison remaining alive in North America declined to as low as 541. During that period, a handful of ranchers gathered remnants of the existing herds to save the species from extinction. These ranchers bred some of the bison with cattle in an effort to produce "cattleo".[32] Accidental crossings were also known to occur. Generally, male domestic bulls were crossed with buffalo cows, producing offspring of which only the females were fertile. The crossbred animals did not demonstrate any form of hybrid vigor, so the practice was abandoned. The proportion of cattle DNA that has been measured in introgressed individuals and bison herds today is typically quite low, ranging from 0.56 to 1.8%.[32][33] In the United States, many ranchers are now utilizing DNA testing to cull the residual cattle genetics from their bison herds. The U.S. National Bison Association has adopted a code of ethics which prohibits its members from deliberately crossbreeding bison with any other species.

Range and population

Despite being the closest relatives of domestic cattle native to North America, bison were never domesticated by native Americans. Later attempts of domestication by Europeans prior to the 20th century met with limited success. Bison were described as having a "wild and ungovernable temper";[34] they can jump 6 feet (1.8 m) vertically,[35] and run 35-40 mph (56–64 km/h) when agitated. This agility and speed, combined with their great size and weight, makes bison herds difficult to confine as they can easily escape or destroy most fencing systems, including most razor wire.

Approximately 500,000 bison currently exist on non-public lands and approximately 30,000 on public lands which includes environmental and government preserves.[36] According to the IUCN, approximately 15,000 bison are considered wild, free-range bison not primarily confined by fencing.[37]

Habitat


Bison herd grazing at the National Bison Range in Montana

American bison live in river valleys, and on prairies and plains. Typical habitat is open or semi-open grasslands, as well as sagebrush, semi-arid lands and scrublands. Some lightly wooded areas are also known historically to have supported bison. Bison will also graze in hilly or mountainous areas where the slopes are not steep. Though not particularly known as high altitude animals, bison in the Yellowstone Park bison herd are frequently found at elevations above 8,000 feet and the Henry Mountains bison herd is found on the plains around the Henry Mountains, Utah, as well as in mountain valleys of the Henry Mountains to an altitude of 10,000 feet.

As livestock

Bison are increasingly raised for meat and hides; the majority of American bison in the world are raised for human consumption. Bison meat is generally considered to taste very similar to good beef, but is lower in fat and cholesterol, yet higher in protein than beef,[38] a fact which has led to the development of beefalo, a fertile hybrid of bison and domestic cattle. In 2005, about 35,000 bison were processed for meat in the U.S., with the National Bison Association and USDA providing a "Certified American Buffalo" program with birth-to-consumer tracking of bison via RFID ear tags. There is even a market for kosher bison meat; these bison are slaughtered at one of the few kosher mammal slaughterhouses in the U.S., and the meat is then distributed nationwide.

Bison meat for sale

Bison are found in publicly and privately held herds. Custer State Park in South Dakota is home to 1,500 bison, one of the largest publicly held herds in the world, but there are questions[vague] about the genetic purity of the animals. Wildlife officials[who?] believe that free roaming and genetically pure herds on public lands in North America can be found only in Yellowstone National Park and the Yellowstone Park bison herd,[39] the Henry Mountains bison herd at the Book Cliffs and Henry Mountains in Utah, at Wind Cave National Park in South Dakota, Fort Peck Indian Reservation in Montana, Mackenzie Bison Sanctuary in the Northwest Territories, Elk Island National Park and Wood Buffalo National Park in Alberta, and Prince Albert National Park in Saskatchewan. Another population, the Antelope Island bison herd on Antelope Island in Utah, consisting of 550 to 700 bison, is also one of the largest and oldest public herds in the United States, but the bison in that herd are considered to be only semi-free roaming, since they are confined to the Antelope Island. In addition, recent genetic studies indicate that, like most bison herds, the Antelope Island bison herd has a small number of hybrid genes from domestic cattle. In 2002 the United States government donated some buffalo calves from South Dakota and Colorado to the Mexican government. Their descendants live in the Mexican nature reserves El Uno Ranch at Janos and Santa Elena Canyon, Chihuahua, and Boquillas del Carmen, Coahuila, located near the southern banks of the Rio Grande and the grassland borderline with Texas and New Mexico.

Recent genetic studies of privately owned herds of bison show that many of them include animals with genes from domestic cattle.[39] For example, the herd on Santa Catalina Island, California, isolated since 1924 after being brought there for a movie shoot, were found to have cattle introgression.[40] It is estimated that there are as few as 12,000 to 15,000 pure bison in the world. The numbers are uncertain because the tests used to date—mitochondrial DNA analysis—indicate only if the maternal line (back from mother to mother) ever included domesticated bovines and thus say nothing about possible male input in the process. It was found that most hybrids look exactly like purebred bison; therefore, appearance is not a good indicator of genetics.

The size of the Canadian domesticated herd (genetic questions aside) grew dramatically through the 1990s and 2000s. The 2006 Census of Agriculture reported the Canadian herd at 2006 195,728 head, 34.9% increase since 2001.[41] Of this total, over 95% was located in Western Canada, and less than 5% in Eastern Canada. Specifically Alberta was the province with the largest herd, accounting for 49.7% of the herd and 45.8% of the farms. The next largest herds were in Saskatchewan (23.9%), Manitoba (10%), and British Columbia (6%). The main producing regions were in the northern parts of the Canadian prairies, specifically in the parkland belt, with the Peace River region (shared between Alberta and British Columbia) begin the most inmportant cluster, accounting for 14.4% of the national herd.[41] Canada also exports bison meat, totaling 2,075,253 kilograms (4,575,150 lb) in 2006.[42]

A proposal known as Buffalo Commons has been suggested by a handful of academics and policymakers to restore large parts of the drier portion of the Great Plains to native prairie grazed by bison.[39] Proponents argue that current agricultural use of the shortgrass prairie is not sustainable, pointing to periodic disasters, including the Dust Bowl, and continuing significant human population loss over the last 60 years. However, this plan is opposed by some who live in the areas in question.[citation needed]

Behavior and ecology


Herd of Bison in Yellowstone National Park
Grazing in winter, Yellowstone National Park. They use their heads to clear out snow for the grass.

American bison galloping. Photos by Eadweard Muybridge, first published in 1887 in Animal Locomotion.

Bison are migratory and herd migrations can be directional as well as altitudinal in some areas.[43][44][45] Bison have usual daily movements between foraging sites during the summer. In a montane valley, bison have been recorded traveling, on average, 3.2 km a day.[45] The summer ranges of bison appear to be influenced by seasonal vegetation changes, interspersion and size of foraging sites, the rut and the number of biting insects.[43] The size of preserve and availability of water may also be a factor.[45] Bison are largely grazers, eating primarily grasses and sedges. On shortgrass pasture, bison predominately consume warm season grasses.[46] On mixed prairie, it appears that cool season grasses, including some sedges, compose 79–96% of their diet.[47] In montane and northern areas, sedges are selected throughout the year.[43] Bison also drink water or consume snow on a daily basis.[45]

Social behavior and reproduction


Female bison live in maternal herds which include other females and their offspring. Male offspring leave their maternal herd when around three years old and will either live alone or join other males in bachelor herds. Male and female herds usually do not mingle until the breeding season, which can occur from July through September.[48] However female herds may also contain a few older males. During the breeding season, dominant bulls maintain a small harem of females for mating. Individual bulls "tend" cows until allowed to mate, by following them around and chasing away rival males. The tending bull will shield the female's vision with his body so she will not see any other challenging males. A challenging bull may bellow or roar to get a female's attention and the tending bull has to bellow/roar back.[49] The most dominant bulls mate in the first 2–3 weeks of the season.[49] More subordinate bulls will mate with any remaining estrous cow that has not mated yet. Male bison play no part in raising the young.

Bison herds have dominance hierarchies that exist for both males and females. A bison's dominance is related to its birth date.[50] Bison born earlier in the breeding season are more likely to be larger and more dominant as adults.[50] Thus bison are able to pass on their dominance to their offspring as dominant bison breed earlier in the season. In addition to dominance, the older bison of a generation also have a higher fertility rate than the younger ones.[50] Cows nurse their calves for at least 7 or 8 months but most calves seem to be weaned before the end of their first year.[45]

Bison have been observed to display homosexual behaviors, males much more so than females. In the case of males, it is unlikely to be related to dominance but rather to social bonding or gaining sexual experience.[51]

Horning

Bison mate in late spring and summer in more open plain areas. During fall and winter, bison tend to gather in more wooded areas. During this time, bison partake in horning behaviors. They will rub their horns against trees, young saplings and even utility poles. Aromatic trees like cedars and pine seem to be preferred. Horning appears to be associated with insect defense as it occurs most often in the fall when the insect population is at its highest.[52]
Cedar and pines emit an aroma after bison horn them and this seems to be used as a deterrent for insects.[52]

Wallowing behavior

A bison wallow is a shallow depression in the soil, which is used either wet or dry. Bison roll in these depressions, covering themselves with dust or mud. Past explanations and current hypotheses suggested for wallowing behavior include grooming behavior associated with shedding, male-male interaction (typically rutting behavior), social behavior for group cohesion, play behavior, relief from skin irritation due to biting insects; reduction of ectoparasite (tick and lice) load; and thermoregulation.[53]

Predation


American bison standing its ground against a wolf pack

While often secure from predation due to their size and strength, in some areas, bison are regularly preyed upon by wolves. Wolf predation typically peaks in late spring and early summer, with attacks usually being concentrated on cows and calves. Observations have shown that wolves more actively target herds with calves than those without. The length of a predation episode varies, ranging from a few minutes to over nine hours.[54][55] Bison display five apparent defense strategies in protecting calves from wolves: running to a cow, running to a herd, running to the nearest bull, running in the front or center of a stampeding herd, and entering water bodies such as lakes or rivers. When fleeing wolves in open areas, cows with young calves take the lead, while bulls take to the rear of the herds, to guard the cows' escape. Bison typically ignore wolves not displaying hunting behavior.[56] Wolf packs specializing in bison tend to have a greater number of males, as their larger size compared to the females allows them to wrestle their prey to the ground more effectively.[57] Healthy, mature bulls in herds rarely fall victim to predators. The grizzly bear can also pose a threat to calves and sometimes old, injured or sick adult bison.

Dangers to humans

Bison are among the most dangerous animals encountered by visitors to the various U.S. and Canadian national parks and will attack humans if provoked. They appear slow because of their lethargic movements but can easily outrun humans—bison have been observed running as fast as 40 miles per hour (64 km/h).

Between 1980 and 1999, more than three times as many people in Yellowstone National Park were injured by bison than by bears. During this period, bison charged and injured 79 people, with injuries ranging from goring puncture wounds and broken bones to bruises and abrasions. Bears injured 24 people during the same time frame. Three people died from the injuries inflicted—one person by bison in 1983, and two people by bears in 1984 and 1986.[58]

Hunting

Bison hunt under the wolf-skin mask, 1832–33

Bison being chased off a cliff as seen and painted by Alfred Jacob Miller.

Buffalo hunting (hunting of the American bison) was an activity fundamental to the Midwestern Native Americans, which was later adopted by American professional hunters, leading to the near-extinction of the species around the year 1890. It has since begun to recover.
Year American
bison (est)
Before 1492 60,000,000[citation needed]
1890 750
2000 360,000
Range history of bison in North America

Original distribution of plains bison and wood bison in North America along the "Great bison belt". Holocene bison (Bison occidentalis) is an earlier form at the origin of plains bison and wood bison.
  Holocene bison
  Wood bison
  Plains bison

Map of the extermination of the bison to 1889. This map based on William Temple Hornaday's late-19th century research.
  Original range
  Range as of 1870
  Range as of 1889

Distribution of public herds of plains bison and of free-ranging or captive breeding wood bison in North America as of 2003.
  Wood bison
  Plains bison

Genetics

Two of the major problems that bison face today are the genetic bottleneck and lack of genetic diversity that has been caused by the very small number of bison that survived their near extinction event. A second genetic problem is the entry of genes from domestic cattle into the bison population, through hybridization.[39]

Officially, the "American buffalo" is classified by the United States government as a type of cattle, and the government allows private herds to be managed as such. This is a reflection of the characteristics that bison share with cattle. Though the American bison (Bison bison) is not only a separate species, but is usually regarded as being in a separate genus from domestic cattle (Bos taurus), they clearly have a lot of genetic compatibility and American bison can interbreed with cattle, although only the female offspring are fertile in the first generation. These female hybrids can be bred back to either bison or domestic bulls, resulting in either 1/4 or 3/4 bison young. Female offspring from this cross are also fertile, but males are not reliably fertile unless they are either 78 bison or 78 domestic.[59] Moreover, when they do interbreed, crossbreed animals in the first generation tend to look very much like purebred bison, so appearance is completely unreliable as a means of determining what is a purebred bison and what is a crossbred cow. Many ranchers have deliberately cross bred their cattle with bison, and it would also be expected that there could be some natural hybridization in areas where cattle and bison occur in the same range.
Since cattle and bison eat similar food and tolerate similar conditions, they have often been in the same range together in the past, and opportunity for cross breeding may sometimes have been common.

In recent decades tests were developed to determine the source of mitochondrial DNA in cattle and bison, and it was found that most private "buffalo" herds were actually cross bred with cattle, and even most state and federal buffalo herds had some cattle DNA. With the advent of nuclear microsatellite DNA testing, the number of herds known to contain cattle genes has increased. Though approximately 500,000 bison exist on private ranches and in public herds, some people estimate that perhaps only 15,000 to 25,000 of these bison are pure and are not actually bison-cattle hybrids. "DNA from domestic cattle (Bos taurus) has been detected in nearly all bison herds examined to date."[60] Significant public bison herds that do not appear to have hybridized domestic cattle genes are the Yellowstone Park bison herd, the Henry Mountains bison herd which was started with bison taken from Yellowstone Park, the Wind Cave bison herd and the Wood Buffalo National Park bison herd and subsidiary herds started from it, in Canada.

A landmark study of bison genetics that was performed by James Derr of the Texas A&M University corroborated this.[61] The Derr study was undertaken in an attempt to determine what genetic problems bison might face as they repopulate former areas, and it noted that bison seem to be doing quite well, despite their apparent genetic bottleneck. One possible explanation for this might be the small amount of domestic cattle genes that are now in most bison populations, though this is not the only possible explanation for bison success.

A wood bison around Coal River in Canada

In the study cattle genes were also found in small amounts throughout most national, state and private herds. "The hybridization experiments conducted by some of the owners of the five foundation herds of the late 1800s, have left a legacy of a small amount of cattle genetics in many of our existing bison herds." He also said, "All of the state owned bison herds tested (except for possibly one) contain animals with domestic cattle mtDNA."[61] It appears that the one state herd that had no cattle genes was the Henry Mountains bison herd in the Henry Mountains of Utah. It is also notable that the Henry Mountain herd was started initially with transplanted animals from Yellowstone Park. However, the extension of this herd into the Book Cliffs of central Utah involved mixing the founders with additional bison from another source, so it is not known if the Book Cliffs extension of the herd is also free of cattle hybridization.

A separate study by Wilson and Strobeck, published in Genome, was done to define the relationships between different herds of bison in the United States and Canada, and to determine whether the bison at Wood Buffalo National Park in Canada and the Yellowstone Park bison herd were possibly separate subspecies, and not plains bison. It was determined that the Wood Buffalo Park bison were actually cross breeds between plains bison and wood bison, but that their predominant genetic makeup was truly that of the expected "wood buffalo".[9] However, the Yellowstone Park bison herd were pure plains bison, and not any of the other previously suggested subspecies. Another interesting finding was that the bison in the Antelope Island bison herd in Utah appeared to be more distantly related to other plains bison in general than any other plains bison group that was tested, though this might be due to genetic drift caused by the small size of only 12 individuals in the founder population. A side finding of this was that the Antelope Island bison herd appears to be most closely related to the Wood Buffalo National Park bison herd, though the Antelope Island bison are actually plains bison.

Bison trails

The first thoroughfares of North America, except for the time-obliterated paths of mastodon or muskox and the routes of the Mound Builders, were the traces made by bison and deer in seasonal migration and between feeding grounds and salt licks. Many of these routes, hammered by countless hoofs instinctively following watersheds and the crests of ridges in avoidance of lower places' summer muck and winter snowdrifts, were followed by the Indians as courses to hunting grounds and as warriors' paths. They were invaluable to explorers and were adopted by pioneers.

Bison traces were characteristically north and south, but several key east-west trails were used later as railways. Some of these include the Cumberland Gap through the Blue Ridge Mountains to upper Kentucky. A heavily used trace crossed the Ohio River at the Falls of the Ohio and ran west, crossing the Wabash River near Vincennes, Indiana. In Senator Thomas Hart Benton's phrase saluting these sagacious path-makers, the bison paved the way for the railroads to the Pacific.[62]

Bison as a symbol

Native Americans

Among Native American tribes, especially the Plains Indians, the Bison is considered a sacred animal and religious symbol. According to University of Montana anthropology and Native American studies professor S. Neyooxet Greymorning, "The creation stories of where buffalo came from put them in a very spiritual place among many tribes. The buffalo crossed many different areas and functions, and it was utilized in many ways. It was used in ceremonies, as well as to make tipi covers that provided homes for people, utensils, shields, weapons and parts were used for sewing with the sinew."[63] The Sioux consider the birth of a White Buffalo to be the returning of White Buffalo Calf Woman, their primary cultural prophet and the bringer of their "Seven Sacred Rites". Among the Mandan and Hidatsa, the White Buffalo Cow Society was the most sacred of societies for women.

United States


Wyoming uses a bison in its state flag.

The 1935 Buffalo nickel—this style of coin featuring an American bison was produced from 1913 to 1938.

Series 1901 $10 Legal Tender depicting military explorers Meriwether Lewis, William Clark, and an American bison.

First postage stamp with image of bison was issued US in 1898—4¢ "Indian Hunting Buffalo". Part of the Trans-Mississippi Exposition commemorative series.

The American bison is often used in North America in official seals, flags, and logos. In the United States, the American bison is a popular symbol in the Great Plains states. Kansas, Oklahoma, and Wyoming have adopted the animal as their official state mammal, and many sports teams have chosen the bison as their mascot. In Canada, the bison is the official animal of the province of Manitoba and appears on the Manitoba flag. It is also used in the official coat of arms of the Royal Canadian Mounted Police.

Several American coins feature the bison, most famously on the reverse side of the "buffalo nickel" from 1913 to 1938. In 2005, the United States Mint coined a nickel with a new depiction of the bison as part of its "Westward Journey" series. The Kansas and North Dakota state quarters, part of the "50 State Quarter" series, each feature bison. The Kansas state quarter has only the bison and does not feature any writing, while the North Dakota state quarter has two bison. The Montana state quarter prominently features a bison skull over a landscape. The Yellowstone National Park Quarter also features a bison standing next to a geyser.

Other institutions which have adopted the bison as a symbol or mascot include:

Piltdown Man Hoax


From Wikipedia, the free encyclopedia


Group portrait of the Piltdown skull being examined. Back row (from left): F. O. Barlow, G. Elliot Smith, Charles Dawson, Arthur Smith Woodward. Front row: A S Underwood, Arthur Keith, W. P. Pycraft, and Ray Lankester. Painting by John Cooke, 1915

The Piltdown Man was a paleoanthropological hoax in which bone fragments were presented as the fossilised remains of a previously unknown early human. These fragments consisted of parts of a skull and jawbone, said to have been collected in 1912 from a gravel pit at Piltdown, East Sussex, England. The Latin name Eoanthropus dawsoni ("Dawson's dawn-man", after the collector Charles Dawson) was given to the specimen. The significance of the specimen remained the subject of controversy until it was exposed in 1953 as a forgery, consisting of the lower jawbone of an orangutan deliberately combined with the cranium of a fully developed modern human.

The Piltdown hoax is perhaps the most famous paleoanthropological hoax ever to have been perpetrated. It is prominent for two reasons: the attention paid to the issue of human evolution, and the length of time (more than 40 years) that elapsed from its discovery to its full exposure as a forgery.

Find


Piltdown Man skull reconstruction

At a meeting of the Geological Society of London on 18 December 1912, Charles Dawson claimed that a workman at the Piltdown gravel pit had given him a fragment of the skull four years earlier. According to Dawson, workmen at the site discovered the skull shortly before his visit and broke it up in the belief that it was a fossilised coconut. Revisiting the site on several occasions, Dawson found further fragments of the skull and took them to Arthur Smith Woodward, keeper of the geological department at the British Museum. Greatly interested by the finds, Woodward accompanied Dawson to the site. Though the two worked together between June and September 1912, Dawson alone recovered more skull fragments and half of the lower jaw bone.[1][2] The skull unearthed in 1908 was the only find discovered in situ, with most of the other pieces found in the gravel pits' spoil heaps.

At the same meeting, Woodward announced that a reconstruction of the fragments indicated that the skull was in many ways similar to that of a modern human, except for the occiput (the part of the skull that sits on the spinal column) and for brain size, which was about two-thirds that of a modern human. He went on to indicate that save for the presence of two human-like molar teeth, the jaw bone found would be indistinguishable from that of a modern, young chimpanzee. From the British Museum's reconstruction of the skull, Woodward proposed that Piltdown man represented an evolutionary missing link between apes and humans, since the combination of a human-like cranium with an ape-like jaw tended to support the notion then prevailing in England that human evolution began with the brain.

A 1913 reconstruction of "Eoanthropus dawsoni"

Almost from the outset, Woodward's reconstruction of the Piltdown fragments was strongly challenged by some researchers. At the Royal College of Surgeons copies of the same fragments used by the British Museum in their reconstruction were used to produce an entirely different model, one that in brain size and other features resembled a modern human. This reconstruction, by Prof. (later Sir) Arthur Keith, was called Homo piltdownensis in reflection of its more human appearance.[3] The find was also considered legitimate by Otto Schoetensack who had discovered the Heidelberg fossils just a few years earlier—he described it as being the best evidence for an ape-like ancestor of modern humans.[4] French archeologist Pierre Teilhard de Chardin participated in the uncovery of the Piltdown skull with Woodward.

Woodward's reconstruction included ape-like canine teeth, which was itself controversial. In August 1913, Woodward, Dawson and Pierre Teilhard de Chardin, a Jesuit priest and friend of Dawson who had trained as a paleontologist and geologist, began a systematic search of the spoil heaps specifically to find the missing canines. Teilhard soon found a canine that, according to Woodward, fitted the jaw perfectly. A few days later Teilhard moved to France and took no further part in the discoveries. Noting that the tooth "corresponds exactly with that of an ape",[5] Woodward expected the find to end any dispute over his reconstruction of the skull. However, Keith attacked the find. Keith pointed out that human molars are the result of side to side movement when chewing. The canine in the Piltdown jaw was impossible as it prevented side to side movement. To explain the wear on the molar teeth, the canine could not have been any higher than the molars. Grafton Elliot Smith, a fellow anthropologist, sided with Woodward, and at the next Royal Society meeting claimed that Keith's opposition was motivated entirely by ambition. Keith later recalled, "Such was the end of our long friendship."[6]

As early as 1913, David Waterston of King's College London published in Nature his conclusion that the sample consisted of an ape mandible and human skull.[7] Likewise, French paleontologist Marcellin Boule concluded the same thing in 1915. A third opinion from American zoologist Gerrit Smith Miller concluded Piltdown's jaw came from a fossil ape. In 1923, Franz Weidenreich examined the remains and correctly reported that they consisted of a modern human cranium and an orangutan jaw with filed-down teeth.[8]

Sheffield Park find

In 1915, Dawson claimed to have found three fragments of a second skull (Piltdown II) at a new site about two miles away from the original finds.[1] Woodward attempted several times to elicit the location from Dawson but was unsuccessful. So far as is known, the site was never identified and the finds appear largely undocumented.
Woodward did not present the new finds to the Society until five months after Dawson's death in August 1916 and deliberately implied that he knew where they had been found. In 1921, Henry Fairfield Osborn, President of the American Museum of Natural History, examined the Piltdown and Sheffield Park finds and declared that the jaw and skull belonged together "without question" and that the Sheffield Park fragments "were exactly those which we should have selected to confirm the comparison with the original type."[6]

The Sheffield Park finds were taken as proof of the authenticity of the Piltdown Man; it may have been chance that brought an ape's jaw and a human skull together, but the odds of it happening twice were slim. Even Keith conceded to this new evidence, though he still harbored personal doubts.[9]

Memorial


The Piltdown Man memorial stone.

On 23 July 1938, at Barkham Manor, Piltdown, Sir Arthur Keith unveiled a memorial to mark the site where Piltdown Man was discovered by Charles Dawson. Sir Arthur finished his speech saying:
So long as man is interested in his long past history, in the vicissitudes which our early forerunners passed through, and the varying fare which overtook them, the name of Charles Dawson is certain of remembrance. We do well to link his name to this picturesque corner of Sussex—the scene of his discovery. I have now the honour of unveiling this monolith dedicated to his memory.[10]
The inscription on the memorial stone reads:
Here in the old river gravel Mr Charles Dawson, FSA found the fossil skull of Piltdown Man, 1912–1913, The discovery was described by Mr Charles Dawson and Sir Arthur Smith Woodward, Quarterly Journal of the Geological Society, 1913–15.

Exposure

Scientific investigation

From the outset, some scientists expressed skepticism about the Piltdown find (see above).

G.S. Miller, for example, observed in 1915 that "deliberate malice could hardly have been more successful than the hazards of deposition in so breaking the fossils as to give free scope to individual judgment in fitting the parts together."[11] In the decades prior to its exposure as a forgery in 1953, scientists increasingly regarded Piltdown as an enigmatic aberration inconsistent with the path of hominid evolution as demonstrated by fossils found elsewhere.[1] Skeptical scientists only increased in number as more fossils were found.[citation needed]

In November 1953, Time published evidence gathered variously by Kenneth Page Oakley, Sir Wilfrid Edward Le Gros Clark and Joseph Weiner proving that the Piltdown Man was a forgery[12] and demonstrating that the fossil was a composite of three distinct species. It consisted of a human skull of medieval age, the 500-year-old lower jaw of a orangutan and chimpanzee fossil teeth. Someone had created the appearance of age by staining the bones with an iron solution and chromic acid. Microscopic examination revealed file-marks on the teeth, and it was deduced from this that someone had modified the teeth to a shape more suited to a human diet.

The Piltdown man hoax succeeded so well because, at the time of its discovery, the scientific establishment believed that the large modern brain preceded the modern omnivorous diet, and the forgery provided exactly that evidence. It has also been thought that nationalism and cultural prejudice played a role in the less-than-critical acceptance of the fossil as genuine by some British scientists.[7] It satisfied European expectations that the earliest humans would be found in Eurasia, and the British, it has been claimed,[7] also wanted a first Briton to set against fossil hominids found elsewhere in Europe, including France and Germany.

Identity of the forger

The identity of the Piltdown forger remains unknown, but suspects have included Dawson, Pierre Teilhard de Chardin, Arthur Keith, Martin A. C. Hinton, Horace de Vere Cole and Arthur Conan Doyle.[13][14]
Teilhard had travelled to regions of Africa where one of the anomalous finds originated, and resided in the Wealden area from the date of the earliest finds. Hinton left a trunk in storage at the Natural History Museum in London that in 1970 was found to contain animal bones and teeth carved and stained in a manner similar to the carving and staining on the Piltdown finds. Phillip Tobias implicated Arthur Keith by detailing the history of the investigation of the hoax, dismissing other theories, and listing inconsistencies in Keith's statements and actions.[15] Other investigations suggest the hoax involved accomplices rather than a single forger.[16]

The focus on Charles Dawson as the main forger is supported by the accumulation of evidence regarding other archaeological hoaxes he perpetrated in the decade or two prior to the Piltdown discovery. Archaeologist Miles Russell of Bournemouth University analyzed Dawson's antiquarian collection and determined at least 38 were fakes.[17][18] Among these were the teeth of a reptile/mammal hybrid, Plagiaulax dawsoni, "found" in 1891 (and whose teeth had been filed down in the same way that the teeth of Piltdown man would be some 20 years later), the so-called "shadow figures" on the walls of Hastings Castle, a unique hafted stone axe, the Bexhill boat (a hybrid seafaring vessel), the Pevensey bricks (allegedly the latest datable "finds" from Roman Britain), the contents of the Lavant Caves (a fraudulent "flint mine"), the Beauport Park "Roman" statuette (a hybrid iron object), the Bulverhythe Hammer (shaped with an iron knife in the same way as the Piltdown elephant bone implement would later be), a fraudulent "Chinese" bronze vase, the Brighton "Toad in the Hole" (a toad entombed within a flint nodule), the English Channel sea serpent, the Uckfield Horseshoe (another hybrid iron object) and the Lewes Prick Spur. Of his antiquarian publications, most demonstrate evidence of plagiarism or at least naive referencing. Russell wrote: "Piltdown was not a 'one-off' hoax, more the culmination of a life's work."[19] In addition, Harry Morris, an acquaintance of Dawson, had come into possession of one of the flints obtained by Dawson at the Piltdown gravel pit. He suspected that it had been artificially aged—"stained by C. Dawson with intent to defraud." He remained deeply suspicious of Dawson for many years to come, though he never sought to discredit him publicly.[20]

Professor Adrian Lister of the UK's Natural History Museum has said that "some people have suggested" that there may also have been a second 'fraudster' seeking to use outrageous fraud in the hope of anonymously exposing the original frauds. He explained that the piece nicknamed the 'cricket bat' (which he "believes" to be fossilised elephant bone) was such a crudely forged 'early tool' that it may have been planted to cast doubt on the other finds, but that it still got accepted at the time, even though it aroused the suspicions of some and thus ultimately helped lead to the eventual recognition of the fraud decades later.[21]

Legacy


A replica of the Piltdown man skull.

Early humans

In 1912, the majority of the scientific community believed the Piltdown man was the “missing link” between apes and humans.[citation needed] However, over time the Piltdown man lost its validity, as other discoveries such as Taung Child and Peking Man were found. R. W. Ehrich and G. M. Henderson note, “To those who are not completely disillusioned by the work of their predecessors, the disqualification of the Piltdown skull changes little in the broad evolutionary pattern. The validity of the specimen has always been questioned.”[22] Eventually, during the 1940s and 1950s, more advanced dating technologies, such as the fluorine absorption test, proved scientifically that this skull was actually a fraud.

Influence

The Piltdown man fraud significantly affected early research on human evolution.[23] Notably, it led scientists down a blind alley in the belief that the human brain expanded in size before the jaw adapted to new types of food.
Discoveries of Australopithecine fossils such as the Taung child found by Raymond Dart during the 1920s in South Africa were ignored due to the support for Piltdown man as "the missing link", and the reconstruction of human evolution was confused for decades. The examination and debate over Piltdown man caused a vast expenditure of time and effort on the fossil, with an estimated 250+ papers written on the topic.

The fossil was introduced as evidence by Clarence Darrow in defense of John Scopes during the 1925 Scopes Monkey Trial. Darrow died in 1938, fifteen years before Piltdown Man was exposed as a fraud.

The hoax is often cited (along with Nebraska Man) by creationists as an example of the dishonesty of paleontologists that study human evolution, despite the fact that scientists themselves had exposed the hoax.[24][25]

In November 2003, the Natural History Museum in London held an exhibition to mark the 50th anniversary of its exposure.[26]

Early 20th century science

The Piltdown case is an example of how racial and nationalist factors shaped some science at the time. Piltdown's semi-human features were explained by reference to non-white ethnicities whom some Europeans of that time considered a lower form of human.[27] The influence of nationalism is clear in the differing interpretations of the find: whilst the majority of British scientists accepted the discovery as "the Earliest Englishman",[28] European and American scientists were considerably more sceptical, and several suggested at the time that the skull and jaw were from two different creatures and had been accidentally mixed up.[27] Regarding the sex of the find, it was discussed as a male, although Woodward suggested that the specimen discovered might be female. The only exception to this was in coverage by the Daily Express newspaper, which referred to the discovery as a woman, but only to use it to mock the Suffragette movement of the time, of which the Express was highly critical.[29]

Timeline

  • 1908: Dawson claims discovery of first Piltdown fragments.
  • 1912 February: Dawson contacts Woodward about first skull fragments.
  • 1912 June: Dawson, Woodward, and Teilhard form digging team.
  • 1912 June: Team finds elephant molar, skull fragment.
  • 1912 June: Right parietal skull bones and the jaw bone discovered.
  • 1912 November: News breaks in the popular press.
  • 1912 December: Official presentation of Piltdown man.
  • 1913: David Waterston concludes the sample to be an ape mandible and a human skull.
  • 1914: Talgai skull (Australia) found, considered, at the time, to confirm Piltdown.
  • 1915: Marcellin Boule concludes the sample to be an ape mandible and a human skull. Gerrit Smith Miller concludes the jaw is from a fossil ape.
  • 1923: Franz Weidenreich reports the remains consist of a modern human cranium and orang utan jaw with filed-down teeth.
  • 1925: Edmonds reports Piltdown geology error. Report ignored.
  • 1943: Fluorine content test is first proposed.
  • 1948: The Earliest Englishman by Woodward is published (posthumously).
  • 1949: Fluorine content test establishes Piltdown man as relatively recent.
  • 1953: Weiner, Le Gros Clark, and Oakley expose the hoax.
  • 2003: Full nature of Charles Dawson's career in fakes is exposed.

Simulacrum

From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Simulacrum Image of a real apple (left), an...