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Dungeness crab season remains closed despite potential for partial open

February 17, 2016 — SAN FRANCISCO — Commercial crab fisheries will now remain closed until state officials lift the health advisory along the entire California coastline.

That decision was made on Wednesday. CDFW officials may open crab fisheries south of the border between Mendocino and Sonoma counties once the state Department of Public Health clears all of the crabs along that stretch of the coast for human consumption.

The commercial crab season has taken a huge financial hit, stalled since public health officials determined the crabs had high levels of domoic acid which is a neurotoxin.

The determination followed the strong recommendation by members of the Dungeness Crab Task Force, who urged state officials on Tuesday to keep the season closed until the health advisory was lifted coast-wide, or at a minimum, for an area south of Point Arena.

The commercial crab season has been stalled since public health officials determined the crabs had high levels of domoic acid, a neurotoxin.

But on Thursday, the CDFW said it would allow recreational crab fishing south of Point Reyes after health officials cleared the crabs for human consumption.

Read the full story at KRON4

Ciguatera fish poisoning predicted to increase with rising ocean temperatures

December 2, 2015 — The following was released by NOAA Fisheries:

A new NOAA study, published in the journal Ecological Modeling, forecasts an increase in ciguatera fish poisoning in the Gulf of Mexico and the U.S. Southeast Atlantic coast with predicted rising global ocean temperatures due to climate change.

Ciguatera-causing algae are abundant in the Caribbean, and ocean warming would enable some of those species to move northward, increasing its presence in the Gulf of Mexico and U.S. southeast Atlantic. Warmer temperatures could also mean larger and longer blooms of harmful algae, including those that produce ciguatoxins.

In the Caribbean, Gambierdiscus are already near the top of their preferred temperature range. Higher temperatures are likely to inhibit the growth of these cells, slightly decreasing the risk of ciguatera in the Caribbean.

“This is another example of how we can use NOAA’s observing and forecasting expertise to anticipate and prepare for environmental change and its impact on coastal communities and economies,” said Mary Erickson, director of NOAA’s National Centers for Coastal Ocean Science, which conducted the research. “It contributes to NOAA’s larger efforts to build a ‘climate-smart’ nation resilient to climate and weather extremes, and long-term changes.”

For this study, researchers projected water temperatures in the greater Caribbean through the year 2099, based on 11 global climate models and data from NOAA buoys in the Caribbean and Gulf of Mexico. Forecasted temperature changes were then used to project the effects of ocean warming on the growth, abundance and distribution of two groups of ciguatera-causing algae (Gambierdiscusand Fukuyoa).

red_snapper_swimming_cropped_300

People can be affected by ciguatera, the most common form of algal-induced seafood poisoning, by eating contaminated tropical marine reef fish such as grouper, snapper and barracuda. The fish can become contaminated with ciguatoxins, potent neurotoxins produced by Gambierdiscus, a microscopic algae common in the tropics.

 

More than 400 fish species are known to become toxic. In U.S. waters, ciguatera occurs in Hawaii, Guam, southern Florida, Puerto Rico, the U.S. Virgin Islands, and occasionally in the Gulf of Mexico, extending around the southeast U.S. coast as far north as North Carolina. Ciguatera impedes development of fisheries resources in many regions of the world. Toxins produced by Gambierdiscus contaminate marine animals such as corals and seaweeds, and the carnivores that feed upon them, causing toxins to move into the food chain.

“Contaminated fish have no specific taste, color, or smell and there is no easy method for measuring ciguatoxins,” said Steve Kibler, a NOAA scientist and the study’s lead author. “However, we can forecast risk based on where and when we are likely to find the algae that produce ciguatoxins.” The forecast will allow communities to target monitoring, saving resources by focusing only on areas and times when ciguatera is likely to be present.

 

Calibration Bar

Color micrograph of Gambierdiscus carolinianus, an algae species widely distributed in the Caribbean, Gulf of Mexico, and the southeast Atlantic coast that produces ciguatoxins. Ciguatera, the most common form of algal induced seafood poisoning, is contracted from the human consumption of tropical marine reef fish contaminated with ciguatoxins.(Credit: NOAA).​

 

This work is part of a larger NOAA effort to develop and implement practical, affordable, and sustainable strategies for managing the risk of ciguatera. Next steps include determining which species are producing the toxins and developing and transferring monitoring technology to managers and researchers in tropical countries around the world.

The ciguatera forecast is part of a NOAA ecological forecasting initiative that aims to deliver accurate, relevant, timely and reliable ecological forecasts directly to coastal resource managers and the public as part of its stewardship and scientific mandates for coastal, marine and Great Lakes resources.

This research was conducted by scientists from NOAA, North Carolina State University, and Ocean Tester LLC.

NOAA’s National Centers for Coastal Ocean Science delivers ecosystem science solutions to facilitate stewardship of the nation’s coastal and ocean resources while sustaining thriving coastal communities and economies.

NOAA’s mission is to understand and predict changes in the Earth’s environment, from the depths of the ocean to the surface of the sun, and to conserve and manage our coastal and marine resources. Join us on Facebook, Twitter, Instagram and our other social media channels.

 

Members of Congress urge disaster relief for Dungeness crab fishermen

November 25, 2015 — In a bit of good news for California’s beleaguered crab fishermen, four members of Congress announced Tuesday they would call for federal disaster relief in the unlikely event the state’s commercial fishing season for Dungeness crab is canceled altogether.

In a letter to Gov. Jerry Brown, the representatives urged the governor to “stand ready” to ask U.S. Secretary of Commerce Penny Pritzker to provide compensation to fishermen and businesses if the crab season — postponed indefinitely Nov. 6 because of high levels of a biotoxin called domoic acid — is wiped out.

The congressmen and congresswomen who signed the letter — Rep. Lois Capps, D-Santa Barbara; Rep. Sam Farr, D-Carmel; Rep. Jared Huffman, D-San Rafael; and Rep. Jackie Speier, D-Hillsborough — represent coastal communities affected by the closure. Last season fishermen earned nearly $67 million from Dungeness crab in California.

Read the full story at San Jose Mercury News

Congress to vote on bill to ban microbead hygiene products in US

November 18, 2015 — US lawmakers are to decide whether to ban personal care products containing microbeads – minuscule pieces of plastic considered harmful to the environment – after proposed legislation was approved by a bipartisan committee.

Microbeads, typically under 5mm in size, are used as abrasive exfoliants in products such as toothpastes and facial cleaners. They often evade water filtration systems and flow into rivers, lakes and streams, where they can be mistaken for food by fish. Pollutants can bind to the plastic, causing toxic material to infect fish and, potentially, the humans that consume them.

The US House energy and commerce committee has unanimously approved the Microbead Free Waters Act of 2015, which was introduced by Frank Pallone, a Democrat, and Fred Upton, a Republican who acts as committee chairman.

The bill would start the phaseout of microbeads from products in the US from 1 July 2017. The federal legislation, if passed, will follow action taken by several states. Last month, California finalised a bill that phases out microbeads from 2020. This follows action taken by Illinois last year, which became the first state to ban the production, manufacture or sale of personal care products containing microbeads.

Read the full story at The Guardian 

 

Toxin Taints Crabs and Kills Sea Mammals, Scientists Warn

November 4, 2015 — The authorities in California are advising people to avoid consumption of crabs contaminated by a natural toxin that has spread throughout the marine ecosystem off the West Coast, killing sea mammals and poisoning various other species.

Kathi A. Lefebvre, the lead research biologist at the Wildlife Algal Toxin Research and Response Network, said on Wednesday that her organization had examined about 250 animals stranded on the West Coast and had found domoic acid, a toxic chemical produced by a species of algae, in 36 animals of several species.

“We’re seeing much higher contamination in the marine food web this year in this huge geographic expanse than in the past,” Ms. Lefebvre said.

She said that the toxin had never before been found in animals stranded in Washington or Oregon, and that there were most likely greater numbers of contaminated marine mammals not being found by humans.

The California Department of Public Health recently advised people to avoid consumption of certain species of crabs because of potential toxicity. Razor clam fisheries in Washington have been closed throughout the summer for the same reason.

In a statement released on Tuesday, the California department said that “recent test results” indicated dangerous levels of domoic acid in Dungeness and rock crabs caught in California waters between Oregon and Santa Barbara, Calif.

Read the full story at The New York Times

When The Fish You Eat Have Eaten Something Toxic

July 3, 2015 — Some tasty saltwater fish carry a toxin that you may never have heard of.

And a recent study found that more people in Florida may be getting sick from eating fish contaminated with the toxin than previously thought.

By comparing Florida public health records with survey results from thousands of fishermen, scientists from the University of Florida found that ciguatera fish poisoning, as the condition is called, is significantly underreported in the state.

Before the study was done, the prevailing estimate of ciguatera poisoning was 0.2 cases per 100,000 people per year. The latest work, led by epidemiologist Elizabeth Radke, suggests the cases may be more than 25 times higher.

Statewide, the case frequency may be as high as 5.6 cases per 100,000 people a year. In Miami-Dade County, the researchers put the number at 28 cases per 100,000, and in Monroe County it was 84 per 100,000.

Read the full story at New York Now

 

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