Reading+1

= **Ok, good job 7pts** = = Reading log 1 - Using Mathematical Models to Study the Dispersion of Exotic Marine Species =

__Before reading__  *Read the tilte and list 10 words you think you might find in the text. Mathematics Study Models Species Fishes Marine Sea Reserch Dispersion Exotic  cells that are monitored by computers  I don't Know anything about Jelly fish but... **Jellyfish** (also known as **jellies** or **sea jellies**) are free-swimming members of the phylum [|Cnidaria].Jellyfish are found in every ocean, from the surface to the deep sea. Some hydrozoan jellyfish, or hydromedusae, are also found in fresh water; freshwater species are less than an inch (25 mm) in diameter, are colorless and do not sting. Many of the best-known jellyfish, such as [|Aurelia], are [|scyphomedusae]. These are the large, often colorful, jellyfish that are common in coastal zones worldwide. Information from __http://en.wikipedia.org/wiki/Jellyfish__.
 * How can you use math applied to biology. Mention one thing you can think of.
 * What do you know about jelly fish? What kind of fish is it? If you don't know, find out, cut and paste an image of this fish. Please acknowledge the source.



 *What is dispersion? If you don't know, find out, please acknowledge the source. 

__While Reading and After Reading__  1. Click on the following link so that you can read the article. [] 2. Try to locate the words you though you were going to find in the text (question 1 before reading) List the words you found there are many words like: Mathematics Models Exotic Marine Species  3. Find what the following referents in bold letters refer to in the text:
 * The species of Jellyfish studied are known as Aurelia and **these(refer to Aurelia)** are found over much of the world’s temperate oceans.
 * By simulating the movement of the jellyfish over a 7,000-year period the study provides strong evidence that the world-wide dispersal post-dates European global shipping and trade, **which**(refer to world-dispersal of aurelia) began almost 500 years ago.
 * Ships take in water for stability before a voyage and, despite preventative measures such as mid-ocean exchange/ flushing, **this 'foreign' water** and **its contents( refer to ** ships ) can find its way into bays and harbours at the ships destination.

4. What is happening with the fish? Jellyfish are a threat to some marine habitats, researchers study their lifestyle to control their movements. Although statistics say there are a large number of jellyfish that are carried by the ocean by unnatural way. 5. What explanation scientists had given? They sais that the Unnatural migration occurs via ballast water from international shipping and because of international trade of marine species. 6. What did mathematicians find out? What does the formula explain? The formula calculates the dispersion in time of jellyfish with just the data the climate and lifestyle of the jellyfish
 * The computer model could answer similar questions about the migration and introduction of any suspected non-native marine creatures, according to **its (refer to computer model) ** developers Professor Matthew England and Alex Sen Gupta.
 * Now we have a tool that can include data on currents, geography and the biology of an organism to help separate natural dispersal **from that which happens** through shipping and trade