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Thread: Crab Warning

  1. #1
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    Default Crab Warning

    As crab season is about to open.
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    CDPH Issues Warning about Dungeness and Rock Crabs Caught in Waters Along the Central and Northern California Coast
    Date: 11/3/2015

    Number: 15-082

    Contact: Anita Gore, Orville Thomas - (916) 440-7259

    SACRAMENTO


    The California Department of Public Health (CDPH) today advised consumers not to eat Dungeness and Rock crabs caught in waters between the Oregon border and the southern Santa Barbara County line, due to the detection of dangerous levels of domoic acid, a naturally occurring toxin.

    Recent test results have shown persistently high levels of domoic acid in Dungeness crab and Rock crab, which have been caught along the California coastline. The levels have exceeded the State’s action level for the crabs’ body meat as well as the viscera, commonly referred to as crab butter, and therefore pose a significant risk to the public if they are consumed.

    CDPH in conjunction with other state agencies will continue its sampling efforts to monitor domoic acid levels in Dungeness and Rock crabs until the levels subside and no longer exceed the State’s action level of 30 ppm in the viscera and 20 ppm in the meat. Domoic acid accumulation in seafood is a natural occurrence that is related to a “bloom” of a particular single-celled plant called Pseudo-nitzschia. The conditions that support the growth of this plant are impossible to predict, and it is unknown when the levels found in crab will subside. The health advisory will be lifted once the levels are no longer above acceptable levels.

    Symptoms of domoic acid poisoning can occur within 30 minutes to 24 hours after eating toxic seafood. In mild cases, symptoms may include vomiting, diarrhea, abdominal cramps, headache and dizziness. These symptoms disappear within several days. In severe cases, the victim may experience trouble breathing, confusion, disorientation, cardiovascular instability, seizures, excessive bronchial secretions, permanent loss of short-term memory (a condition known as Amnesic Shellfish Poisoning), coma or death. There have been no reported illnesses associated with this event.

    To receive updated information about shellfish poisoning and quarantines, call CDPH’s toll-free Shellfish Information Line at (800) 553-4133. For additional information visit CDPH’s Natural Marine Toxins: PSP and Domoic Acid Web page.

  2. #2

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    a small c&p from noaa website.

    . Both shellfish and fish can accumulate this toxin without apparent ill effects; however, in humans the toxin crosses into the brain and interferes with nerve signal transmission. People poisoned with very high doses of the toxin can die, while lower doses can cause permanent brain damage (short term memory loss). When this toxin was discovered in certain West coast fish and shellfish, both recreational and commercial fisheries were briefly closed. This closure, though relatively short, had serious economic impacts on those communities dependent on these fisheries.

    take this warning seriously
    Last edited by taurus; 11-04-2015 at 09:21 AM.

  3. #3

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    Thanks, I was planning on crabbing next week. I'll call the number to keep posted.

  4. #4
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    Contacts:

    Jordan Traverso
    CDFW Communications
    (916) 654-9937














    FOR IMMEDIATE RELEASE - November 5, 2015







    Commission Delays Opener of Recreational Dungeness Crab Season and Closes Northern Part of Recreational Rock Crab Fishery







    rock crab


    Rock crab


    CDFW photo



    The California Fish and Game Commission today voted 3-0 in favor of an emergency rulemaking to prohibit recreational take and possession of Dungeness crab and all rock crab from ocean waters, including bays and estuaries, north of the Ventura/Santa Barbara county line. Closure of the fisheries will remain in effect until the Director of the Office of Environmental Health Hazard Assessment (OEHHA), in consultation with the Director of the California Department of Public Health (CDPH), determines that domoic acid levels no longer pose a significant risk to public health and no longer recommends the fisheries be closed.



    The Commission also directed the California Department of Fish and Wildlife (CDFW) to maintain a list of closed ocean waters of the state and update that list on Wednesday of each week by 1 p.m. It is the responsibility of any person, prior to taking Dungeness crab, to call CDFW's hotline at (831) 649-2883 or visit the CDFW website to obtain the current status of any ocean water.



    The recreational Dungeness crab season was scheduled to start Saturday, Nov. 7.



    CDPH, in conjunction with CDFW, has been actively testing crabs since early September and results from the most recent tests showed that the health risk to humans is significant. CDHP issued a health advisory on Tuesday. OEHHA followed that with a recommendation for delays and closures of the crab fisheries.CDFW will continue to coordinate with CDPH and OEHHA to test domoic acid levels in crab along the coast to determine when the fisheries can safely be opened.



    Domoic acid is a potent neurotoxin that can accumulate in shellfish, other invertebrates and sometimes fish. It causes illness and sometimes death in a variety of birds and marine mammals that consume affected organisms. At low levels, domoic acid exposure can cause nausea, diarrhea and dizziness in humans. At higher levels, it can cause persistent short-term memory loss, epilepsy, and can in some cases be fatal.



    Domoic acid is produced from some species of the marine diatom Pseudo-nitzschia. Currently, a massive toxic bloom of Pseudo-nitzschia has developed, significantly impacting marine life along California's coast. Biologists tested crab from eight ports from Morro Bay to Crescent City, and determined that domoic acid levels are exceeding the State's action level.



    Algal blooms are common, but this one is particularly large and persistent. Warmer ocean water temperatures, due to the El Nińo event California is experiencing, are likely behind the large size and persistence of this bloom.




    Commercial fisheries are also affected by domoic acid levels. CDFW has the authority to delay or otherwise restrict commercial fisheries, and is developing an emergency rulemaking under that authority. The commercial Dungeness crab season is currently scheduled to open Nov. 15.

  5. #5

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    I just saw this. We caught and ate crabs (didn't no it was closed). Lucky I guess, did not get sick.

  6. #6

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    Anyone read an update on the opener? I can't find it if there is one, besides calling and getting the same message.

  7. #7

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    still the same in ca. closed. oregon closed the rec season due to high levels. oregon is likely to closed the dec. 1 commercial opener. washington is still deciding on thier dec. 1 opener.
    not looking good.

  8. #8

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    anyone no if spider crabs are open or closed?

  9. #9

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    Prozac, spider crabs aka sheep crabs fall under the classification of rock crabs, and are therefore closed for take.
    Not to mention that if Dungeness and rock crabs have dangerous levels of domoic acid, it is probably wise to avoid any kind of filter feeder like crabs or mussels.
    .02$ for ya.

  10. #10

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    How bout Rock Scalops, those to?

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