DISCOVERY & FINDINGS SUSPICIOUS MOLLUSKS WERE FOUND ON PATROL - - PowerPoint PPT Presentation

DISCOVERY & FINDINGS

• SUSPICIOUS MOLLUSKS WERE FOUND ON PATROL BOAT #1 DECEMBER

18, 2013 AND SUBSEQUENTLY ON 2 SUBSTRATE SETTLING DEVICES

• SAMPLES WERE COLLECTED BY BOTH STAFF & DFW STAFF AND SENT TO

LAB FOR DNA TESTING

• POLYMERASE CHAIN REACTION (DNA REPLICATION) CONFIRMED

DECEMBER 30, 2013 BY BODEGA BAY MARINA LABORATORY THAT SAMPLES WERE QUAGGA MUSSELS

BIOLOGICAL INFORMATION

• SMALL FRESHWATER BIVALVES KNOWN TO ATTACH TO NEARLY ANY HARD

SURFACE WITH THE EXCEPTION OF COPPER

• RANGE IN SIZE FORM 2.7MM TO 21MM WITH ROUNDED SHELL EDGES
• EACH FEMALE MAY GENERATE ONE MILLION OFFSPRING OR MORE

ANNUALLY.

• PREFER SHALLOW TEMPERATE WATERS BUT CAN RANGE IN DEPTHS FROM

1 INCH OF WATER TO 4OO FEET

• MAY LIVE FOR UP TO 30 DAYS OUT OF WATER
• AN ADULT CAN FILTER 100 GALLONS OF WATER PER YEAR.

ECOLOGICAL IMPACT

 CHANGE AQUATIC BIODIVERSITY BY FILTERING OUT FOOD SOURCES, SUCH AS ZOOPLANKTON FOR NATIVE FISH, BIRDS, AND MUSSELS.  RAPID SPAWNING ALLOWS THIS SPECIES TO OUT COMPETE NATIVE SPECIES AND AS RESULT DISRUPT THE FOOD CHAIN  RAPID FILTERING ALLOWS GREATER LIGHT PENETRATION, RESULTING IN INCREASED ALGAE AND VEGETATION GROWTH  CREATES WATER QUALITY ISSUES (TASTE & ODOR)  CAN GENERATE HIGH LEVELS OF BOTULISM AND FECAL MATTER IN WATER AND MAY ALSO RESULT IN INCREASED BACTERIOLOGICAL LEVELS

ECONOMIC IMPACTS

• A 1995 CLEARINGHOUSE STUDY INDICATED AN AVERAGE ANNUAL COST

OF $214,360 PER WATER TREATMENT FACILITY

• MWD SPENDS MILLIONS OF DOLLARS ANNUALLY ON QUAGGA MUSSEL

MANAGEMENT (RANGES DEPENDING UPON SHUTDOWNS NECESSARY)

• PRIVATE MARINAS IN LAKE MEAD AVERAGE $175,000 ANNUALLY ON

MANAGEMENT PRACTICES

• CALIFORNIA CONSERVATIVELY ESTIMATES STATE WIDE COSTS TO

CURRENTLY BE $30 MILLION BUT EXPECT THAT TO CLIMB TO $250 MILLION IF INFESTATION SPREADS

• UWCD: UNKNOWN AT THIS TIME

WHAT HAD WE BEEN DOING?

• CONDUCTING VESSEL INSPECTIONS ON ALL VESSELS SINCE LATE 2007 WITH EXCEPTION OF TAGGED VESSELS

BEGINNING IN 2009 (APPROX. 35-4O THOUSAND VESSELS)

• ALL BOATS WERE REQUIRED TO BE CLEAN, DRAINED & DRY UPON ARRIVAL (ZERO TOLERANCE ON MOISTURE).
• PERFORMING ROUTINE MONITORING OF SUBSTRATE SETTLING DEVICES AT VARIOUS LOCATIONS ON LAKE
• PROVIDE WATERCRAFT INSPECTION AND DECONTAMINATION TRAINING TO ALL PERSONNEL (LEVEL I FOR

STAFF & LEVEL II FOR MANAGEMENT)

• SPOTS CHECKS OF INSPECTION PROGRAM BY DFW AND UWCD MANAGEMENT
• VISUAL INSPECTIONS OF INFLOW FROM PYRAMID
• INTERNAL VESSEL TAGGING FOR RETURNING VISITORS
• RECIPROCAL PROGRAM BETWEEN CASTAIC PYRAMID

WHAT IS UWCD DOING?

CURRENT MEASURES:

• WORKING WITH DFW TO ENSURE COMPLIANCE WITH ALL LAWS/REGULATIONS AND TO PREVENT SPREAD
• ESTABLISHING EXTENT OF INFESTATION, BASELINE WATER QUALITY & ATTEMPT TO DETERMINE SOURCE
• POPULATION DENSITY & DISPERSMENT SURVEYS VIA DIVE OPERATIONS
• ADVISE ALL BOATERS OF INFESTATION (ONE-ON-ONE CONTACT, FLIERS, SIGNS)
• SECURE A CONSULTANT TO DEVELOP CONTROL/ERADICATION PLAN
• CONTINUE BOAT INSPECTION PROGRAM FOR ALL INCOMING VESSELS
• QUARANTINE FAILED VESSELS
• ADVISING ALL BOATS LEAVING ON RECOMMEND MEANSURES TO CONTROL SPREAD

WHAT IS UWCD REQUIRED TO DO?

• ESTABLISH EXTENT OF INFESTATION (DIVERS, PHOTOS, INSPECTIONS OF FACILITIES)
• ESTABLISH BASELINE WATER QUALITY AND MONITOR FOR CHANGES
• DEVELOP AND IMPLEMENT A DFW APPROVED CONTROL & ERADICATION PLAN (WHAT ARE WE

GOING TO DO TO PREVENT SPREAD AND OR TO ELIMINATE QUAGGAS).

• ADVISE ALL BOATERS OF THE INFESTATION (PUBLIC EDUCATION, FLIERS, SIGNS)
• COLLABORATION WITH LOCAL, STATE, AND FEDERAL AGENCIES

OPTIONS AVAILABLE

HOW DO WE STOP/CONTROL THE QUAGGA MUSSEL?

• MECHANICAL/PHYSICAL:
• ELECTRONIC CONTROL DEVICES
• ULTAVIOLET LIGHT TREATMENT ON EFFLUENT (98% EFFECTIVE)
• TURBULENCE/VELOCITIES ON EFFLUENT
• COPPER PLATING
• SPECIALIZED COATING OF INFRASTRUCTURES SUCH AS INTAKES
• RUBBER MATTING
• SCRAPING/CLEANING OF INFESTED AREAS
• COLLECTION & REMOVAL OF ADULT MUSSELS
• QID ELECTRONIC DATABASE LINKING FACILITIES (PROPOSED)
• ANNUAL LICENSE $1,000, $350 ENROLLMENT, $75 PER MONTH FOR PDA = $2000 PER YEAR & $2500 1ST YEAR

OPTIONS CONT.

• BIO CONTROL MEASURES:
• OTHER SPECIES (FISH SUCH AS RED EAR PERCH LOCALIZED IN INFESTED)
• FILTER FEEDERS TO ERADICATE/CONTROL VELIGER SPREADING
• BIO CREATED SOILS
• CHEMICAL MEASURES:
• CHEMICAL APPLICATION SUCH AS COPPER SULFATE (BLUE STONE)
• ALGAECIDES

IMPACTS ON INFRASTRUCTURE

UWCD OUTREACH