Exotic mussels spreading in California

Dec 26, 2007

Quagga mussels, an exotic species native to Ukraine that was first found in the Great Lakes 18 years ago, have been found in a fifth San Diego County reservoir.

San Diego water officials said the small, fast-growing clam, first discovered in the Southern California county during the summer, was found in "significant" numbers at Maramar Reservoir in Scripps Ranch, The San Diego Union-Tribune reported Tuesday. Quaggas apparently were transported from Europe to Lake Erie in the United States in the ballast water of oceangoing ships, the newspaper said.

The mussels grow virtually unmolested because they have no natural predators. They clog pipes and screens at power stations, water treatment plants and agricultural irrigation lines.

San Diego officials will trying to slow their spread by increasing inspections of watercraft used at Miramar Reservoir, said Arian Collins of the city's water department. Other reservoirs in the county also have imposed tighter restrictions.

Copyright 2007 by United Press International

Explore further: There was a decline of male diversity when humans took to agriculture

Related Stories

For many US teachers, the classroom is a lonely place

1 hour ago

One of the best ways to find out how teachers can improve their teaching is to ask them. The massive Teaching and Learning International Survey (TALIS) did just that and the answers offer crucial insights for teachers, school ...

Recommended for you

Killer bees test a double win for Australian honeybees

58 minutes ago

A genetic test that can prevent the entry of 'killer' bees into Australia and worldwide spread has been created by researchers at the University of Sydney and their collaborators at York University in Canada.

Viral proteins may regulate human embryonic development

2 hours ago

A fertilized human egg may seem like the ultimate blank slate. But within days of fertilization, the growing mass of cells activates not only human genes but also viral DNA lingering in the human genome from ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.