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Terissa bena’y brown


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Terissa bena’y brown

  1. 1. •Small shellfish (mollusk) withstriped patterns on shells.•Usually alternating light anddark bands.•Some don’t have thesepatterns.•Typically 2 inches or less in size.•Lifespan of 4 to 8 years.•Extremely high reproductiverate of 30,000 to 1,000,000 newmussels per year.•Able to reproduce at 1 yearof age.•About 2% of zebra musselsreach adulthood.
  2. 2. •Fairly wide ranges ofenvironmental conditions.•Temperatures between68 F and 77 F and watercurrents 0.15 to 0.5 metersper second.•Mid 50 F range whenspawning.•Can adapt to saline water.•Lakes with high calciumcontent.
  3. 3. •Not native to the U.S.•Filter feeders.•Disrupt aquatic ecology.•Secrete durable elastic strands,called byssal fibers, which allowthem to attach to any surface.•Threat to navigation, boating,and industry.•Colonize water intake pipes.•Can foul beaches and createnavigation hazards.•Hazardous to bare feet.•Cleanup costs are expensive.•Impact on recreational fishing.
  4. 4. •Native to drainage basins of Black,Caspian, and Aral Seas of EasternEurope.•Balkans, Poland (former SovietUnion).•First appeared in North America in1988 in Lake St. Clair, Michiganwhich connects Lake Huron andLake Erie.•Freshwater European Port in theballast water of a ship.
  5. 5.  Screen mesh. Increasing intake and distribution flows. Physically scraping the mussels. Oxygen deprivation and thermal controls. Draining cooling systems. Dumping bait buckets. Inspecting boats thoroughly. Bleach solutions and other chemicals.