Exotic%20Nuisance - PowerPoint PPT Presentation

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Exotic%20Nuisance

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... hot water 32 C) Acoustical vibration Electrical current Filters, ... Effects Water Clarity Commercial Fishermen and clammers Clog pipes Recreational ... – PowerPoint PPT presentation

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Title: Exotic%20Nuisance


1
Exotic Nuisance
  • By Robin Clarke

2
Dreissena polymorphaZebra Mussel

3
(No Transcript)
4
Possible methods of arrival
  • Ballast water of ships
  • Attachment to anchors and rope coils

5
(No Transcript)
6
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7
Biological Effects
  • Intense filter feeders
  • plankton
  • toxic material
  • Grow in dense clusters

8
                                               
                        
9
Commercial Effects
  • Water Clarity
  • Commercial Fishermen and clammers
  • Clog pipes

10
(No Transcript)
11
Recreational Effects
  • Boats, boat dock, and boat hulls
  • Remains of zebra mussels
  • Decrease in fish

12
Methods being used to control zebra mussels
  • Chemical molluscicides Oxidizing (chlorine,
    chlorine dioxide) and Non-oxidizing
  • Manual removal (pigging, high pressure wash)
  • Dewatering / Desiccation (freezing, heated air)
  • Thermal (steam injection, hot water gt32C)
  • Acoustical vibration
  • Electrical current
  • Filters, Screens

13
  • Coatings Toxic (copper, zinc) and Non-toxic
    (silicone-based)
  • Toxic constructed piping (copper, brass,
    galvanized metals)
  • Carbon dioxide injection
  • Ultraviolet light
  • Anoxia / Hypoxia
  • Flushing

14
Zebra Mussels.
Dreissena polymorpha
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