"Oh-mio, oh-my-oh, Oh Cleveland Ohio! He got the question!"- CJ Craig

May 09, 2006 18:09

I had a great Birthday yesterday, I got lots of earings and a quesadilla maker and a new printer and today I am getting WEST WING SEASON SIX!!! Okay I can not wait to get it.

I am working on my imperial officer uniform I need to cut the lining and another peice but also another underlay peice and the collar.

I have my forensics essay sort of down it is it it;s early stage but take a look.



Hannah Susorney
May 7, 2006
Forensics
Informative
Ten-thousand years ago the plains of Asia, Europe and North America looked remarkably similar to African plains today. Herds of thousands and thousands of creatures that only exist today in our museums were once hunted by creatures that still fascinate us, including the cheetah. Once, four different species of cheetahs inhabited the world. Now, only one survives. This one surviving species, a relict from the past, carries with it a sign of the destruction of its ancestors. A sign hidden deep within the genes that code for everything it is made of.
Cheetahs fascinate our society because they are the fastest land-animal on earth, able to careen through the African plains at up to seventy miles per hour. They are a constant source of astonishment. The cheetah species, Acinonyx jubatus, has its own separate genus because it is different from its other feline relatives. Thin and lithe, but shy to the cameras, who doesn’t like cheetahs? When in the 1950’s we realized how threatened their population in Africa was, we took it upon ourselves to stop their endangerment. Like with many other big cat species, many zoos started a cheetah breeding program. But soon something was not right. While other big cats became accustomed to breeding and raising litters in captivity, cheetahs did not. Some blamed their shyness, but we quickly came to understand that there was another complication. This problem was hidden, invisible to the naked eye, but the effects of it were everywhere.
The United States National Zoo in Washington, DC, was one of many to realize that something was wrong, but of the few to address the situation. By hiring two young scientists, Mitch Bush and David Wildt, it was discovered that cheetah sperm was 75% malformed, in comparison to other species, which usually have 25% or less malformed sperm. What could explain this? Malformed sperm counts are only found in individuals that are severely inbred. But the cheetahs exhibiting these characteristics were found in all areas of the country, and had been taken from a variety of parts of Africa.
In the 1980’s two scientist Bush and Wildt ran genetic test on the cheetah in comparison with other big cats and what they found was freighting. Cheetahs Alzome DNA was almost identical in unrelated individuals mot animals including other big cats have an aloe difference of around 20%-50%. What this all means is that cheetah DNA is nearly identical.
Shortly afterwards at a Wildlife park in the US and Africa a study was done of cheetahs DNA and Skin grafts. Skin grafts is wear they remove a small piece a skin normally around a couple inches and transfer it between two individuals, if the individuals are related they have a good chance of accepting a skin graft of the two individuals are unrelated they will not accept each others skin grafts. With the cheetahs they did she three different types f skin grafts on the cheetahs one from a related individual, one from an unrelated individual and one from a house hold cat. The household cat skin graft was rejected by all cheetahs showing that there immune systems work but all cheetahs accept all other cheetahs skin graft as if they all were related intervals with no genetic diversity. What could have caused this lack of genetic diversity.
The reason Cheetahs have no to low genetic diversity is because of something called the bottleneck effect. The bottleneck effect is a theory that once in the species history this time the cheetah they’re was a time when the specs had normal genetic diversity and then something happen this something is believed to be the 10,000 the end of the Pelostine and the wide scale extinction of large mammals including the other three species of cheetahs. The cheetah population was rapidly shrinking like other large mammalian species but instead of disappearing like they did, cheetahs survived when it looked like all hope was lost they were able to pull through, but the period of time when they forced to breed with elated individuals caused the DNA of cheetahs to be nearly identical.
In the late 80’s serious implications beside the fact that they have trouble breeding were surfacing. One of the most deadly happened at a Organ Wildlife Safari. Two new cheetahs were brought in, little did the workers at the Safari know they were carries of a virus called FIPV. FIPV or feline infectious pertounious virus causes a build up of proteins in the abdomen causing the internal organs to be strangled causing a slow and painful death. Thankfully the mortality rate is between 2-5%, never over 10% in other cat species. At the Safaris 60% of the adult cheetahs died and 85% of the cubs.
After learning about the bottleneck effect found in cheetahs scientist=t started looking at different animals as well and seeing this was nit just a one species thing. The Asiatic lion is also showing signs of lack of genetic diversity such as low -breeding rate and more deformity in the young. The Asiatic lions was believed to have gone through there bottleneck in the early 1900’s when there population was believed to be under 100.
Cheetahs future is relatively unknown they are currently endangered and the total wild population is relatively unknown because of there shyness. Cheetahs lack of genetic diversity can cause problems since they’re population is shrinking and with the low breeding rate and susceptibly to disease the future of the cheetahs.
The cheetahs lack of genetic varity because of an extinction in the past is a wake up call for all. The fact that if a species populations drops under a certain level could destory gentic varity. We as humans contain this notion that we can always bring a species back from near extinction, while endagerment does not conmend a speices to a dealth in the next 100 years 1000 years from now is still up in question. The cheetahs geneatic tale is a wake up call that we must keep species population at a healthy level so that is does not cause lack of genetic diversity.

Today's quote is Cj before the second election.

life, imperial, forensics

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