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Miss Baker's Biology Class Wiki
Pages and Files
9th Honors Biology
Science Online '09
How Will I Meet This Expectation?
How Did I Meet This Expectation?
Demonstrate ability to
evaluate sources of
biology information on
-I will accept and deny web sources on
-I will find credible sources for my
classmates to use.
I have both critiqued other web sources
and added two web sources to be reviewed
by my classmates.
These ones were added and accepted by me
This one I have denied
Demonstrate an ability
to read and understand
current biology news
-Look up biology sources and write
about them on the blog and wiki.
I have both found and used two sources in my post
use of online resources
-I will have my sources check for
credibility before I use them.
I have had the website for burkley university aproved
for all of my classmates to use.
Publish work that is
available for peer-review
-I am going to send my jellyfish post to
-I will put all my sources for the
Jellyfish post on the wiki.
My jellyfish post was displayed on this wiki page
below the chart.
It will also be available on the blog soon.
Discuss published work
with a practicing biologist
in that particular field
-I will try commenting on other blogs
owned by biologists.
I have commented on Mr. Bird's blog on this specific
-Accept or deny web sources found by
my classmates on the wiki.
I have constructivly editted christopher's post about sickle cell anemia.
-My comments will be relative to what
we are learning.
-I will put up a few sources about what
we learn in class on the wiki.
I have commented on Rachael's post about the
genealogy that we have been learning in class. I have commented on both skye's snake
snake post and Rachael's twins post
-My jellyfish post is going to have an
illistration about the irakanji jellyfish.
My jellyfish post has a slightly humerous illistration about the
Hi I am Connor. I have a few interests in physics and chemistry when it comes to biology. I just started to learn how play the guitar.
My favorite lab that we have done this year is the ant acid lab. I like watching how much better alka-seltzer was dominating the other ones when acid was mixed with them.
Box Jellyfish (killers of the sea)
True jellies feed on plankton. They float around the seas of the world eating whatever they find. True jellies feed primarily on invertebrates and move by floating in the tide. Jellies are annoying and can cause stings, but their cousin, the box jelly, is the killer.
Box Jellyfish a.k.a. (Killing Machine)
The box jellyfish has so much venom that the slightest touch can bring agonizing death within 180 seconds. No other animal can immobilize and/or kill a human with this level of speed or ease. Box jellies have a square shaped bell and are part of a group called Cubozoans.
Cubozoans are known to have 20 species living in tropical and semi-tropical seas. The cubozoan bell holds the manufbrium and mouth. Muscular pads called pedalia are on the corners of the bell. The tentacles are connected to each pedalium. The pedalium pushes the tentacle and prey into the bell. Then reaches out for the prey and the mouth expands and engulfs it. Feeding takes less than a minute.
Why so deadly?
Box jellyfish have a square-shaped float with tentacles streaming from the corners of the bell. Venom is released on contact – even after it is dead – and each creature has 4,000,000,000 venomous fibers. When an animal touches the box jellyfish, the nematocysts fire, puncture the victim and eject venom. The venom paralyzes and kills the box jelly’s prey, which are usually invertebrates. Box jellyfish have 6 – 8 ft long tentacles. Just 5 – 6ft of the tentacle across the body is enough to kill a human in 3 minutes. When a tentacle fires it immobilizes and wraps around the body of its prey. In effect, if you touch a tentacle, the tentacle contracts on you and fires of its venom . 68 People have died since 1883. Box jellies hunt fish which are vertebrates. Box jelly venom is not targeted for humans but we are vulnerable because of our similar nervous system. It causes severe pain and cardiac arrest. Ouch! Irunkandji is a small box jelly(10 -10mm long) that moves at night though the jelly nets. This box jelly is responsible for Irukandji syndrome, a potentially fatal condition that attacks the central nervous system. It begins with a mild sting. Within an hour, victims experience severe lower back pain, shooting pains all over the body, cramping, nausea, vomiting, profuse sweating and coughing. The venom takes 20 minutes to pass through the lymphatic system and into the heart.
Box jellies are voracious eaters and hunt their prey. This is all make easier by the fact that they have
with moveable pupils giving them 360 degree visibility. These eyes can even distinguish color. They have nerve clusters each with the sole purpose of finding prey. Prey is the correct word because box jellies hunt for food. Nematocysts are concentrated in rings of stinging fibers on the tentacles of the
. Box jellies are great swimmers and can reach speeds of 3.5 miles/hour. They swim against the tide in search of prey.
Box Jellies mate once a year. After settlement, the planulae grow into polyps. The polyps can move around, and they frequently bud off additional polyps. The polyps mature in a few months. Then each polyp metamorphoses into a single juvenile medusa. When box jellies come under sustained attack, they respond with a super-breeding frenzy to create millions of replacements.
What is being done to protect swimmers?
For years box jelly nets have been used off the coast of Australia. This works well for all of the larger species. When you are stung only 20% of the venom is fired. Vinegar does not stop the pain but will prevent the additional 80% of the venom from firing. Magnesium helps with the pain as well as morphine in doses eight times greater than needed for a broken leg. A jellyfish with a deadly sting has been bred in captivity for the first time by Australian scientists. This is the first step in developing an antivenom. When supplies of captive Box jellies reach 10,000 to
antivenom developments can begin. This study will help in diagnosis of irikandji syndrome and may have other pharmaceutical benefits as well. For now though, swim with caution in Australia.
Is the lack of natural prey bringing box jellies to the coast? How can an animal with no brain process what its eyes see? How does the study of neurotoxins help pharmaceutical companies find cures for human diseases?
This is a good post. It has everything it needs, but I might suggest maybe adding a video to help as a visual aid. This is just a suggestion, but it would probably make your post better. Otherwise, I found no spelling or grammatical errors.
This is a really good post Conner, I agree with Chris, you might want to add some creativity, but all your sources seem credible and you have really good questions-Teddy
: Good post Connor! just a few suggestions is to put an interesting picture of a jelly fish just to add some creativity and you should put a video about these jelly fish. overall though is was a very good post.
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