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zebra mussels emily wallwork

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emily wallwork

on 18 March 2014

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Transcript of zebra mussels emily wallwork

Invasive Species
Zebra Mussels
Dreissena polymorpha
What they do
What they attach to
They may attach to boats, pilings, water-intake pipes, and other hard surfaces, as well as to crayfish, turtles, other zebra mussels, and native mollusks using an organ called the byssus.
Removal Methods
Threat to other species
The animals and algae that is food for zebra mussels is food for larval fish and other native species too. Large zebra mussel populations may cause a decline in other animals, including native fish, mollusks, and birds. Zebra mussels are filter feeders meaning that they literally suck water in, filter it and spit the filtered water back into the lake, river, bay, ect.
Chemical Removal
Manual Removal
Zebra mussels must be removed by being scraped off the sides of pipes and other things they are attached to. They must be collected and disposed of properly to ensure they do not simply re-attach themselves to the pipe
Many chemicals kill zebra mussels, but these exotics are so strong that everything in the water would die in order to kill the mussel
Appearance and Facts
They're usually about fingernail size but can grow to a maximum length of about 2 inches. They have a D shape shell with zebra like stripes, this is where they get their name. They have an external organ called a byssus, which consists of many threads and is the organ used to attach to things.
-Zebra mussels live 4 to 5 years and live in fresh water 6 to 24 feet deep
-A female zebra mussel begins to reproduce at 2 years of age, and produces between 30,000 and 1 million eggs per year
-Easily spread by water currents.
Threat to Navigation, Boating, and Industry
Zebra mussels colonize water intake pipes, severely restricting the water flow to power plants. On boats, they may attach to the hull, motor, or any item immersed in the water
A female zebra mussel begins to reproduce at 2 years of age, and produces between 30,000 and 1 million eggs per year. The zebra mussels and zebra mussel larva is easily spread by water currents, ballast water from ships and boats.
How they got here
Zebra mussels were transported from Europe to North America in the ballast water of ships. They were discovered North America in Lake St. Clair, Ontario in 1988, people believe that they invaded the lake in either 1985 or 1986
How The Public Can Help
Companies that control population
Ener tech, inc. is a company that helps to control the population using non-chemical fluid treatment technology. Extensive water testing is conducted to maintain proper water chemistry. The facilities they offer can be used in any water system and requires little room for installation
Zebra Mussel Distribution
Clean, drain and dry method
Clean: using an antibacterial cleaner clean as much of your boat as possible
Drain: drain your boat of all water to ensure no zebra mussel larva is still in your boat
Dry: leave your boat to dry to ensure that the lava could not live and spread to other bodies of water
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