Tuesday, December 6, 2011

Great White Shark


Carcharodon carcharias



Hierarchy of Classification:

Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Lamniformes
Family: Lamnidae
Genus: Carcharodon
Species: carcharias

Even though we depict these massive creatures as dangerous killers, in recent studies scientist have begun to show the distinction between a harmful vicious species and a curious misunderstood being. The research shows that of the annual one hundred plus shark attacks worldwide Great Whites are accountable for one-third to one-half of them. Even though this might seem like a great number the statistics also show that of the shark attacks, only a few are actually fatal. This might not seem significant but what we don't understand is that these attacks are due to curiosity. In most of these cases the shark will bite the victim and then release them. They call this "sample biting." What we can take from this information is the idea that humans are not actually the main course for these large mammals. This doesn't however mean that rare occasions will not occur and shark attacks won't happen anymore but the idea is to stay relaxed if you ever do come into contact with this animal.



Of the largest predatory fish in the world, Great White Shark on average are around fifteen feet in length but have been known to exceed twenty feet in length and weigh up to five thousand pounds. Their upper bodies are grey in order to blend in with the rocky ledges of the sea floor. The name Great White Shark comes from the bleach white color of their underbellies. They have many fins and a large powerful tail to propel them through the waters at rates as fast as fifteen miles per hour. The mouths of these animals are lined with up to three hundred razor sharp teeth that shred their prey. Along with their teeth, these creatures have an amazing sense of smell that helps them detect their prey as well. The animals they usually prey on include sea lions, seals, small toothed whales, and even sea turtles, and carrion.


Viegas, J. (2011, 12 04). Animals: Nat geo wild. Retrieved from http://animals.nationalgeographic.com/animals/fish/great-white-shark/

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Tuesday, November 22, 2011

Head Strong

Seborrheic dermatitis, more commonly known as, dandruff, is a common fungal skin disorder that mainly affects the scalp. Dandruff is not harmful to our overall health but produces a very high level of discomfort amongst individuals that have this unfortunate skin disorder. Along with this feeling of discomfort, people tend to be embarrassed when signs of this disorder occur because they fear that people will judge them and decide that the reasoning behind this skin disorder is due to poor personal hygiene. Poor personal hygiene is not the reasoning behind this disorder at all. S. dermatitis is formed due to oily or greasy skin.

  In most cases individuals develop red patches that produce flaky, white /yellow scales that peal from their scalp. Even though this disorder is usually found on the scalp, other areas of the body that are affected as well are the face, upper chest, back, ears, and any other body parts that have sebaceous glands. Researchers have found that S. dermatitis runs in the family. We can see that some of the causes include stress, fatigue, weather extremes, obesity, rare shampoos, and oily skin.



Word Count: (187)

Encyclopedia, M. (13 M). Pub med health. Retrieved from http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001959/

Tuesday, October 25, 2011

The Black Death!

When we take a look back in history we find many instances of where people are attacked by this deadly bacterium we call the bubonic plague (Yersina pestis). This epidemic in history begins with small rodents. Rodents such as mice, rats, and squirrels are usually found carrying the infection. This infection originates from fleas that have bitten rodents and consumed contaminated blood. This infection becomes harmful to humans when these rodents enter our homes carrying these fleas. After one person becomes infected the plague can spread like a wildfire from one person to another through coughing and sneezing. This disease causes red spots to form on the skin that turn black where we get the name, The Black Death. Some of the other symptoms associated with the bubonic plague are; swollen lymph nodes, high fever, chills, and headaches.

There are many ways to try and prevent this disease from infesting our country. Some of these prevention techniques include controlling our rat population, keeping an eye on the plague cases in rats and humans in the area, using pesticides to reduce the amount of fleas, and treating and controlling the fleas on our pets. In treating this disease we use antibiotics such as streptomycin and tetracycline to try and control these symptoms. There are also vaccines available in order to prevent this disease for those who are helping to try to cure those who already have the disease. I decided to choose this disease/bacterial infection because it was one of the first terms that caught my attention when I googled the different species of bacteria. The bubonic plague was interesting because it is a life threatening disease and an epidemic that has covered most of the world at least one point in time.


Word Count: 292

Wednesday, October 12, 2011

Introducing The Yellow Jacket

 Represeted in the picture, the yellow jacket, Vespula acadica, is sometimes mistaken for a bee but actully belongs to the wasp classification. Yellow jackets are most commonly found in decayed logs where they weave their loose networks to create a coloy. Yellow jackets are yellow and black in order to warn their enemies to stay away. The reasoning behind this is the stinger located at the end of their bodies. Unlike the honeybees they are often associated with, yellow jackets are able to sting more than once. The sting is a defense mechanism used to inflict pain on its target. In most cases, the only way yellow jacket venom is life threating is if the person is allergic.