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Tuesday 4 May 2010

Dendrobates Tinctorius

Dendrobates tinctorius, also known by the common name dyeing dart frog, is a species of poison dart frog. It is the largest species, reaching lengths of 50 millimetres. This species is distributed throughout the eastern portion of the Guiana Shield, including parts of Guyana, Suriname, Brazil, and nearly all of French Guiana.The Golden Poison Frog's alkaloid poison, one of a number of poisons common to dart frogs, prevents nerves from transmitting impulses, leaving the muscles in an inactive state of contrac The average dose carried will vary between locations, and consequent local diet, but the average wild P. terribilis is generally estimated to contain about one milligram of poison, enough to kill about 10,000 mice. This estimate will vary in turn, but most agree that this dose is enough to kill between 10 and 20 humans, which correlates to up to two African bull elephants. This is roughly 15,000 humans per gram.tion. This can lead to heart failure or fibrillation

Jelly Fish



Jellyfish (also known as jellies or sea jellies) are free-swimming members of the phylum Cnidaria. All jellyfish sting their prey using nematocysts, also called cnidocysts, stinging structures located in specialized cells called cnidocytes, which are characteristic of all Cnidaria. Contact with a jellyfish tentacle can trigger millions of nematocysts to pierce the skin and inject venom Scyphozoan jellyfish stings are often uncomfortable, though not generally deadly, but some species of the class Cubozoa, or the Box jellyfish, such as the famous and especially toxic Irukandji, can be deadly. Stings may cause anaphylaxis, which may result in death. Hence, victims should immediately get out of the water. Medical care may include administration of an antivenom


King Cobra

The King Cobra is the world's longest venomous snake, with a length up to 5.6 m. This species is widespread throughout Southeast Asia and parts of India, and is found mostly in forested areas. The king cobra is fierce, agile and can produce large amounts of highly potent venom in a single bite. It is one of the most dangerous and feared Asiatic snakes.The venom of King Cobra is primarily neurotoxic but also contains cardiotoxic compounds.It is composed mostly of proteins and polypeptides. During a bite, venom is forced through the snake's half-inch (1.25 cm) fangs and into the wound, and quickly attacks the victim's central nervous system and induces severe pain, blurred vision, vertigo, drowsiness, and paralysis. Envenomation progresses to cardiovascular collapse, and the victim falls into a coma. Death soon follows due to respiratory failure. In the past, the LD50 of King Cobra’s venom was treated as 1.7 mg/kg (which is one of the least toxic elapids. However, this is not always true. According to the recent toxinology study, the LD50 of Chinese King Cobra venom is 0.34 mg/kg . This shows that actually King Cobra can be more venomous than most of the other species with its range, like chinese cobra]. The King Cobra is also capable of delivering larger quantities of venom than most other venomous snakes, injecting a 380-600 mg dose in a single bite. This quantity is enough to kill 20-40 grown men or even an elephant. One bite from a King Cobra can cause the death of a healthy adult human within 15 minutes,but death usually occurs between 30–45 minutes.The mortality rate from a bite can be over 75%, or only 33%, depending upon treatment details. It is regarded as one of the deadliest snakes in the world.



Black Mamba

The black mamba is the longest venomous snake in Africa, with an average length around 8 feet, but may grow to 14 feet. It got its name because of the black inside of its mouth; the actual color of the skin is varied: dull yellowish-green to a gun-metal grey. It is one of the fastest snakes in the world, capable of moving at 10 to 12 mph.The Black mamba is one of the most venomous snakes in the world, with a LD50 of 0.25 mg/kg. Its bite delivers about 100–120 mg of venom on average, however it can deliver up to 400 mg of venom; 10 to 15 mg is deadly to a human adult. The bites from a black mamba can produce enough venom to kill 15-25 people. Mortality rate is nearly 100% unless the snakebite victim is promptly treated with black mamba antivenom or is put on a respirator or ventilator.

Rattle Snake


There are approximately thirty species of rattlesnake, with numerous subspecies. They receive their name for the rattle located at the end of their tails. The rattle is used as a warning device when threatened.scarring is very likely in the event of a venomous bite, even with prompt, effective treatment, and a severe envenomation, combined with delayed or ineffective treatment, can lead to the loss of a limb or death. Thus, a rattlesnake bite is always a potentially fatal injury. Untreated rattlesnake bites, especially from larger species, are very often fatal. However, antivenom, when applied in time, reduces the death rate to less than 4%. It is estimated that between 7,000 and 8,000 people are bitten by venomous snakes each year, and about five of those die.

Red Back Spider

The Redback spiders live everywhere throughout the Australian continent. Female Redback spiders are black in color with a very apparent red or orange stripe that is visible on the back of the spider. The female Redback spider is dangerous and almost always connected to human deaths. Redback spider bites cause severe pain at the site of the bite and cause other symptoms to include: sweating, muscular weakness, vomiting, and nausea. Redback spider venom is a neurotoxin that affects the neurotransmitters causing there depletion. The Redback spider has caused several reported deaths of bitten human beings but none have died since the release of an antivenom. Over 250 bites receive antivenom treatment each year with many more cases most likely go unreported.

Piranha

A piranha or piraƱa is a member of family Characidae in order Characiformes of omnivorous freshwater fish that live in South American rivers. In Venezuelan rivers, they are called caribes. They are known for their sharp teeth and a voracious apPiranha teeth are often used to make tools and weapons by the indigeneous population. Piranha are also popular as food, although if an individual piranha is caught on a hook or line, it may be attacked by other piranhas.Piranha are commonly consumed by subsistence fishermen and often sold for food in local markets. In recent decades, dried specimens have been marketed as tourist souvenirs. Piranhas occasionally bite and sometimes injure bathers and swimmers. A piranha bite is sometimes considered more an act of carelessness than that of misfortune, but piranhas are a considerable nuisance to commercial and sport fishers because they steal bait, mutilate catch, damage nets and other gear and may bite when handled.


Coral Snake

The coral snakes are a large group of elapid snakes that can be subdivided into two distinct groups, Old World coral snakes and New World coral snakes. There are 11 species of Old World coral snake in one genus, and over 65 recognized species of New World coral snakes in three genera. New World coral snakes possess the second most potent venom of any North American snake, behind some rattlesnake species. However, few bites are recorded due to their reclusive nature and the fact they generally inhabit sparsely populated areas. When confronted by humans, coral snakes will almost always attempt to flee, and bite only as a last resort. In addition, coral snakes have short fangs that cannot penetrate thick leather clothing. Any skin penetration, however, is a medical emergency that requires immediate attention. Coral snakes have a powerful neurotoxin that paralyzes the breathing muscles; mechanical or artificial respiration, along with large doses of antivenom, are often required to save a victim's life. There is usually only mild pain associated with a bite, but breathing difficulties and ptosis can occur within hours.

Komodo Dragon

The Komodo dragon is a species of lizard that inhabits the islands of Komodo, Rinca, Flores, and Gili Motang in Indonesia.A member of the monitor lizard family, it is the largest living species of lizard, growing to an average length of 2 to 3 metres and weighing around 70 kilograms. Their unusual size has been attributed to island gigantism, since there are no other carnivorous animals to fill the niche on the islands where they live.However, recent research suggests that the large size of komodo dragons may be better understood as representative of a relic population of very large varanid lizards that once lived across Indonesia and Australia, most of which died out after contact with modern humans, along with other megafauna.Although attacks are very rare, Komodo dragons have been known to attack humans; on June 4, 2007 a Komodo dragon attacked an eight-year-old boy on Komodo Island. The boy later died of massive bleeding from his wounds. It was the first recorded fatal attack in 33 years. Natives blamed the attack on environmentalists outside the island prohibiting goat sacrifices. This denied the Komodo dragons their expected food source, causing them to wander into human civilization in search of food. On March 24, 2009, two Komodo Dragons attacked and killed fisherman Muhamad Anwar on Komodo. Anwar was attacked after he fell out of a sugar-apple tree and was left bleeding badly from bites to his hands, body, legs, and neck. He was taken to a clinic on the neighboring island of Flores where he was pronounced dead on arrival.
In a bizarre incident in June 2001, Phil Bronstein, Executive Editor of the San Francisco Chronicle newspaper, was given a special tour of the Komodo dragons at the Los Angeles Zoo for a Father's Day present by his wife, the actress Sharon Stone. Bronstein and Stone were benefactors of the zoo. While barefooted and petting one of the dragons, Bronstein was bitten and subsequently lost his big toe.

The great white shark, Carcharodon carcharias, also known as great white, white pointer, white shark, or white death, is a large lamniform shark found in coastal surface waters in all major oceans. The great white shark is very well known for its size, because it can exceed 6 metres in length and 2,240 kilograms in weight. It becomes sexually mature at around 15 years of age and has a lifespan of 30 to over 100 yearsMore than any documented attack, Peter Benchley's best selling novel Jaws and the subsequent 1975 film adaptation directed by Steven Spielberg provided the great white shark with the image of a "man eater" in the public mind.While great white sharks have killed a few humans, they typically do not target them: for example, in the Mediterranean Sea there have been 31 confirmed attacks against humans in the last two centuries, most non-fatal. Many incidents seem to be "test-bites". Great white sharks also test-bite buoys, flotsam, and other unfamiliar objects, and might grab a human or a surfboard to identify it. The great white shark is arguably the world's largest known predatory fish, eating dolphins, porpoises, whale carcasses and pinnipeds such as seals and sea lions. It is the only surviving species of its genus, Carcharodon.