Biotoxins and Red Tide Megan Hintz & Taylor Solomon Lummi - - PowerPoint PPT Presentation

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Biotoxins and Red Tide Megan Hintz & Taylor Solomon Lummi - - PowerPoint PPT Presentation

Dec 26, 2022 247 likes •410 views

Shellfish Safety Biotoxins and Red Tide Megan Hintz & Taylor Solomon Lummi Nation Annual Fishers Meeting June 24 th 2019 Harmful Algae Blooms (HABs) RED TIDE 2 Toxic algae can make you sick Toxic algae Shellfish eat People eat bloom

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SLIDE 1

Shellfish Safety Biotoxins and Red Tide

Megan Hintz & Taylor Solomon Lummi Nation Annual Fishers Meeting June 24th 2019

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SLIDE 2

Harmful Algae Blooms (HABs)

RED TIDE

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SLIDE 3

Toxic algae can make you sick

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Toxic algae bloom

  • Ideal water

conditions for algae blooms include sunlight, nutrients for plant growth, and warm water temperatures.

Shellfish eat algae

  • Shellfish that feed
  • n toxic algae

blooms become toxic and unsafe to consume

People eat shellfish

  • Toxic shellfish are
  • eaten. Possibly

making consumer sick in anywhere from minutes to 24 hours.

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SLIDE 4

3 Types of HABs / Biotoxins

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  • Paralytic Shellfish

Poisoning (PSP)

  • Diarrhetic Shellfish

Poisoning (DSP)

  • Amnesic Shellfish

Poisoning (ASP) (Domoic acid)

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SLIDE 5

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LETHAL

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SLIDE 6
  • 1st confirmed US cases at

Sequim Bay in 2011 < Short term Long term >

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SLIDE 7

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LETHAL

DOMOIC ACID

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SLIDE 8

Biotoxin History in WA

1900

1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s

PSP testing in WA started 1930 PSP deaths 1942 3 events 6 illness, 3 deaths PSP outbreak in BC 1957 Widespread PSP toxicity in WA

First PSP closure in South Sound

1978 3 events 17 illnesses 40% required hospitalization 1988 1991 5 illnesses 1980s 4 events 10 illnesses

Now

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SLIDE 9

Biotoxin History in WA

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1900 Now

1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s

PSP testing in WA started 1930 PSP deaths 1942 3 events 6 illness, 3 deaths PSP outbreak in BC 1957 Widespread PSP toxicity in WA

First PSP closure in South Sound

First DSP illness in WA 2011 1978 3 events 17 illnesses 40% required hospitalization 1988 Domoic Acid (ASP) detected on the West Coast 1991 2003 2000s 2 events 10 illnesses 2012 3 events 9 illnesses 2010 7 hospitalizations 1991 5 illnesses 1980s 4 events 10 illnesses West Coast ASP event 2015 First Domoic Acid Closure in Puget Sound

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SLIDE 10

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Maximum PSP Levels

Closure level Symptoms Lethal levels 2009-2010 2018

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SLIDE 11

Red tide / biotoxin risk is increasing

  • Unusual time of year
  • Longer closures
  • HIGHER toxin levels
  • Multiple blooms in a year
  • NEW BIOTOXINS

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SLIDE 12

Safely harvesting shellfish

  • Myths
  • Health risks
  • Check for closures

THE ONLY WAY TO KNOW IF SHELLFISH ARE

SAFE TO EAT IS BY TESTING THEM IN A LAB

CHECK FOR CLOSURES

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SLIDE 13

LNR takes action

Increased monitoring and information

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SLIDE 14

New beach signage

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SLIDE 15

Thank you!

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Megan Hintz MeganH@lummi-nsn.gov 360-312-2213

Lummi 24-hr fishery hotline: (360) 380-6899 WA Department of Health Hotline: 1-800-562-5632 www.doh.wa.gov/ShellfishSafety Lummi Natural Resources Website: www.lummi-nsn.gov Lummi Natural Resources Office (360) 384-7119