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ZEBRA MUSSELS INVASIVE SPECIES ESSAY make sure to include •Gives detailed information on place of species...

ZEBRA MUSSELS INVASIVE SPECIES ESSAY

make sure to include

•Gives detailed information on place of species origin and where and how species found way into the country
•Gives detailed information about the harmful impact of the species in the environment. Many examples are used and explained
•Explains in detail where invasive species is currently found in.
•Explains in detail what the organism looks like with distinguishing characteristics. Provides two or more different clear pictures of the invasive species
•Explains in detail current measures to keep the invasive species under control.
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Answer #1

Zebra mussels (Dreissena polymorpha) are small bivalve freshwater invasive animal of the world. They originally belong to Caspian sea and reached North America in the mid of 1980s. They easily establish themselves on the rocks of fresh waters. The increase in their populations in the water results into economic losses due to clogging of water pipes (water treatment and power generation) inside the water body. They filter out water algae, fishes hindering the ecosystem of fresh water and even can cut swimmers feet by their sharp shells. These organisms do not grow into high salt and temperature conditions.

Structural Features- Zebra mussels have bivalve molluscs of 0.25 to 0.5 inches. They have a hard shell of D- or wedged shape which have a zigzag pattern like zebra, thus named so. They attach themselves at any surface such as lake bottom, rocks, aquatic plants and attach with the help of 'byssal threads'. the attachment is with the base and their neighbor mussels.  they have two tiny siphons for respiration and feeding.

Reproduction- The male and female mussels release their sperm and eggs respectively in the water, thus are available to fertilize. Fertilization results into the formation of larva (veliger), which feeds on algae. During their growth on algae, the organisms are spread to other distant areas through water and wind.

Their growth can prevented by their non transportation from one water body to another by any mode.

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