>
 
FishingBoating-World.com
 
 
News Home Newsletters Photo Gallery Powerboat-World Australian Cruising World Cruising MarineBusiness-World Animated Knots
Video Gallery MarineBusiness-World
Sail-World.com : Combined efforts allow fishermen to harvest shellfish on Georges Bank
Combined efforts allow fishermen to harvest shellfish on Georges Bank


'Scientists have known for many years that the phytoplankton Alexandrium fundyense is the cause of the harmful algae blooms that occur to varying severity each spring and summer along the coastal Gulf of Maine, sometimes extending as far south as Cape Cod and the adjacent islands, and in Georges Bank. In 1990, an Alexandrium bloom caused the closure of Georges Bank to harvest of surf clams and ocean quahogs, after fishermen were sickened from eating shellfish.'    Don Anderson / WHOI

Collective research efforts by scientists involved in the Gulf of Maine Toxicity (GOMTOX) project, funded by NOAA’s Ecology and Oceanography of Harmful Algal Blooms (ECOHAB) program, and administered by the National Centers for Coastal Ocean Science (NCCOS), have led to enhanced understanding of toxic algal blooms on Georges Bank.

This new information, coupled with an at-sea and dockside testing protocol developed through collaboration between GOMTOX and U.S. Food and Drug Administration (FDA) investigators, has allowed fishermen to harvest ocean quahogs and surf clams in these offshore waters for the first time in more than two decades.

An elevated area of the sea floor between Cape Cod and Nova Scotia, Georges Bank is one of the best fishing grounds on Earth. For decades scientists speculated the blooms on Georges Bank were fueled by coastal blooms in the Gulf of Maine, but new research suggests the population of toxin-producing algae on Georges Bank occupies a distinct niche. -  Jack Cook - WHOI  
The shellfish industry estimates the Georges Bank fishery can produce up to one million bushels of surf clams and ocean quahogs a year, valued $10 – 15 million annually.

'There is a billion dollars’ worth of shellfish product on Georges Bank that is property of the United States but that can't be harvested because of the threat of toxicity, and 99.9% of the time, it is good wholesome product,' says Dave Wallace of North Atlantic Clam Association and a GOMTOX participant.

'In an unusual and unique partnership, we worked with GOMTOX scientists, the FDA, and the states of Massachusetts, Rhode Island, New Jersey and Delaware and now that huge resource can go into commerce, which helps the entire country.'

'We are extremely pleased that research funded by NOAA can provide such an economic boost to New England shellfisheries,' says Robert Magnien, Director of NCCOS’ Center for Sponsored Coastal Ocean Research. 'It is a clear example of how research authorized by the Harmful Algal Bloom and Hypoxia Research and Control Act can protect both public health and local economies through collaborations between academic scientists, state and federal regulatory agencies, and the shellfish industry.'

An elevated area of the sea floor between Cape Cod and Nova Scotia, Georges Bank is one of the best fishing grounds on Earth. But since 1990, it has been closed to harvesting of surf clams and ocean quahogs after harmful algal blooms (also referred to as 'red tides') caused paralytic shellfish poisoning (PSP) that sickened fishermen. For decades scientists speculated the blooms on Georges Bank were fueled by coastal blooms in the Gulf of Maine.

More recent research by GOMTOX investigators, however, has shown that Georges Bank is home to a separate and distinct population of the toxic algae, which is described in a recently published paper by Woods Hole Oceanographic Institution (WHOI) scientist Dennis McGillicuddy and other members of the GOMTOX team.

It has been known for many years that the phytoplankton Alexandrium fundyense is the cause of the harmful algal blooms that occur to varying severity each spring and summer along the coastal Gulf of Maine, sometimes extending as far south as Cape Cod and the adjacent islands.

The algae’s seed populations or 'cysts' germinate from seabeds starting in early spring and bloom at the sea surface, until all of the necessary nutrients in the water are consumed. As the nutrients run out, the cells form cysts and fall to the seafloor, as seed for the following spring. High concentrations of the toxic algae can cause closure of shellfish beds and cost the region many millions of dollars.

Precisely why the blooms vary in severity has been much more difficult to determine, and has involved extensive seasonal sampling of water and sediments, study of coastal currents, environmental and oceanographic conditions, availability of nutrients, and the development of a computer program to model all of the variables.

Researchers got the first signal that something very different was happening on Georges Bank during a research cruise to count Alexandrium cells in sea water samples in spring/summer 2007. 'We devised our sampling strategy to look at the cells’ transport pathways from coastal waters onto the Bank,' says McGillicuddy. Throughout the coastal Gulf of Maine, the numbers were very low. But when the research team started sampling at Georges Bank, they found very high concentrations of Alexandrium in the water, despite the fact that the bloom had not really begun along the coast of Maine.

'I’ll never forget the moment we hit a big patch of cells on Georges Bank,' says Dave Townsend, a GOMTOX scientist from the University of Maine and co-author of the paper. 'We extended our sampling to go all the way across Georges Bank and we were still hitting them. We had to turn around and completely reorganize our sampling strategy based on what we were seeing in the microscope.'

Dennis McGillicuddy is a senior scientist at WHOI and one of the GOMTOX research collaborators working to understand the population dynamics of the toxic algae. -  Tom Kleindinst / Woods Hole Oceanographic Institution  
For such a large bloom to occur, the researchers reasoned the number of cysts on Georges Bank must be similar to the quantities needed to initiate a bloom along the coast. Yet, their fall 2007 survey to map the cyst distribution in the seabed on the Bank found very few cysts – quantities not likely to cause a large bloom along the coast.

In the three-year course of intensive study on Georges Bank since then, blooms have occurred every year, in concentrations that would typically lead to toxicities in coastal shellfish beds. Yet, a parallel effort by the fishing industry and federal testing labs to analyze shellfish samples from Georges Bank found the bivalves to be clean of toxins. So while toxins were produced at and near the surface, they were not delivered to the surf clams and ocean quahogs in the seabed in quantities sufficient to threaten human health.

The system on Georges Bank was indeed a riddle: Few cysts, yet large blooms; a large bloom, yet little to no toxicity in the shellfish. Applying the same detailed analyses to the offshore population of Alexandrium that they applied to coastal populations, the scientists discovered the optimum growing conditions for Alexandrium on Georges Bank were colder and saltier than those of their coastal relatives. Their analysis uncovered how the currents in the region can isolate Georges Bank to create colder and saltier conditions. If the conditions are favorable, the researchers say, Alexandrium populations can double every three days, and in a month’s time, grow from concentrations of 10 cells per liter to 10,000.

Further setting the Georges Bank population apart was the finding by GOMTOX colleagues at University of Massachusetts, Dartmouth’s School for Marine Science and Technology (SMAST), working in collaboration with the FDA, who determined that the toxin content of algae on Georges Bank was different than the coastal Gulf of Maine populations. 'The toxins present in Alexandrium cells from Georges Bank were, on average, two times lower than those in the coastal Gulf of Maine,' said Chrissy Petitpas, a doctoral student working in Professor Jefferson Turner’s lab at SMAST.

Despite this new information and the knowledge that the clams have been shown to be safe for humans to eat at the present time, the fact remains that concentrations of the toxins in the clams on Georges Bank in 1989 and 1990 did reach dangerous levels. Scientists know that coastal shellfish populations are directly exposed to the toxins when the blooms make landfall, but they remain uncertain about the conduit for toxicity from the surface ocean to the deep shellfish beds on Georges Bank, located at about 50m depth.

But, thanks to an innovative screening protocol and regulatory structure developed collaboratively by the FDA, NOAA’s National Marine Fisheries Service, the fishing industry, and testing labs approved by the National Shellfish Sanitation Program, a system is now in place to monitor, test, and verify that clams harvested from Georges Bank are safe. The clams are checked by fishermen at sea using the newly available test kit, and re-checked by regulators when the fishing vessels reach the dock. Combined with the weekly monitoring of shellfish beds along the coast during the bloom season to protect human health, these monitoring systems are extremely effective at keeping toxic shellfish off the market.

Recent research has led the scientists to think Georges Bank is home to a separate and distinct population of the toxic algae, which still holds some mysteries for the researchers. Coastal shellfish populations are directly exposed to the toxins when the blooms make landfall, but scientists remain uncertain about the conduit for toxicity from the surface ocean to the deep shellfish beds on Georges Bank, located at about 50m depth. -  Jack Cook - WHOI  
'Toxin levels in shellfish on Georges Bank have been very low over the last few years. We are confident that this new testing protocol will serve to protect public health should toxin levels rise again in the future,' said Stacey DeGrasse, seafood research coordinator in the FDA’s Office of Regulatory Science and a major participant in the development of the new offshore testing protocol. 'We intend to continue to work closely with NOAA to ensure that the shellfish from this region are harvested safely.'

'I’ve run over 2,500 samples from Georges Bank since mid-March, and all of them have been clean of toxin,' says Darcie Couture, a former manager of the marine biotoxins program at the Maine Department of Marine Resources, who now operates the federally permitted testing lab. 'We’ve been fortunate in finding a way that we can safely harvest that product out there.'

'Although we can’t predict when conditions on Georges Bank will favor a large bloom, our knowledge of the bloom dynamics was used in establishing a suitable management approach,' says Don Anderson, a senior scientist at WHOI and the lead investigator on the GOMTOX project.

For the scientists, the work to understand the dynamics of the Georges Bank population continues. New DNA evidence uncovered by Woods Hole Center for Oceans and Human Health researchers Deana Erdner (University of Texas) and Mindy Richlen from Don Anderson’s laboratory at WHOI, suggests the Georges Bank Alexandrium population is genetically distinct.

'We thought the Georges Bank population was just the little toe at the end of the coastal population, but it’s not. It is separate, and it occupies a distinct niche from the rest of the Alexandrium in this region,' says McGillicuddy. 'This was a big surprise to us.'

The research was funded, in part, by NOAA’s NCCOS, with additional support provided by NSF and NIEHS through the Woods Hole Center for Oceans and Human Health.

The Woods Hole Oceanographic Institution is a private, non-profit organization on Cape Cod, Mass., dedicated to marine research, engineering, and higher education. Established in 1930 on a recommendation from the National Academy of Sciences, its primary mission is to understand the oceans and their interaction with the Earth as a whole, and to communicate a basic understanding of the oceans' role in the changing global environment.


Website: Woods Hole Oceanograpic Institute


by Woods Hole Oceanographic Institution

  

Click on the FB Like link to post this story to your FB wall

http://www.fishingboating-world.com/index.cfm?nid=108398

7:03 PM Sat 13 Apr 2013GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







FishingBoating-World

The new application from PredictWind for Mac and PC is revolutionary for accessing weather data when offshore. Accessing GRIB files, Weather Routing, GMDSS forecasts and Satellite Imagery is now a simple task with the unique and user friendly interface. ... [more]  

Marine Rescue Middle Harbour Unit Commander Peter Nott said thieves had stolen the motor from a 3.9m aluminium runabout that is the centrepiece of the unit’s annual raffle, damaging the boat in the process. The raffle prize is a Quintrex 390 Explorer runabout fitted with a 9.9hp Mercury 4-stroke outboard on a registered Quintrex trailer, worth almost $9,000. ... [more]  

Results in from ‘Operation Go Easy on the Alcohol’ by Transport Roads and Maritime Services
More than 1211 vessel safety checks and 127 random breath tests were carried out during Operation Go Easy on the Alcohol with one person charged with operating a vessel with a low range prescribed concentration of alcohol (PCA) and 30 fines for lifejacket breaches. ... [more]  

Some dogs were born for the water, others less so. The key to boating with dogs, says Boat Owners Association of The United States (BoatUS), is taking it slow and making safety number one. ... [more]  

Researchers from the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) at the University of Queensland and the Department of Agriculture Fisheries and Forestry examined thousands of newspaper articles dating back to 1870 to reveal the historic catch rates for the iconic Queensland fishery. ... [more]  

The BP oil spill saga, a fledgling US aquaculture industry and contentious red snapper management issues were some of the hot topics on tap recently at the Guy Harvey Fisheries Symposium at the University of South Florida’s St. Petersburg campus. ... [more]  

Extinction risk not the answer for reef futures by ARC Centre of Excellence Coral Reef Studies
Coral and reef fishes are not like pandas and tigers, and the extinction risks they face are much lower. Leading coral reef scientists in Australia and the USA say there needs to be a new approach to protecting the future of marine ecosystems, with a shift away from the current focus on extinction threat. ... [more]  

An auction is set to be held at Runaway Bay Marina, Gold Coast, on Saturday 22nd November. Telephone bidding is available by contacting, Jo on 0407 213 557, or email, jo@marineauctions.com.au. ... [more]  

Garmin, the global leader in satellite navigation, has announced its next generation of open-array digital radars – the GMR™ 424, 624/626 and 1224/1226 xHD2. Continuing to set the standard for open-array radars, the xHD2 series offers brand new features and capabilities that provide better precision, targeting and performance while transmitting power at four, six and 12 kilowatts respectively. ... [more]  

Garmin Ltd has announced a new line of scanning transducers designed to accommodate any calibre of mariner, from the casual cruiser to the professional angler. Supporting both the newest lines of Garmin echoMAP and GPSMAP chartplotters and multifunction displays (MFD), this full array of thru-hull and transom-mounted transducers are a valuable addition to any vessel. ... [more]  

Arvor reveals new diesel range by Arvor Boats Australia
Boat building should be both creative and technical and Arvor has always sought to push back its boundaries. This is what inspired its creators in the first place. And this is what leads us to the future. This summer Arvor Boats are delighted to announce the launch of two new models to the hugely popular and ever growing Arvor range – the 690 D and 730 D. ... [more]  

The Australian Marine Alliance (AMA) congratulated the recreational and commercial fishing sectors in NSW for standing shoulder-to-shoulder in a rally organised for outside of NSW Parliament at 1pm today. The rally was organised last week as a result of the NSW State Minister Katrina Hodgkinson tabling sweeping reforms in Parliament without an ounce of consultation. ... [more]  

With 29 boats and over 200 anglers competing, Wahoo Smackdown V, hosted by the historic Bimini Big Game Club Resort and Marina, provided heavy action this past weekend. Taking home the first place trophy—an original painting by renowned marine artist Carey Chen— and a check for heaviest wahoo caught (47.6 pounds) was Team 'Cash Out' captained by Jimmy Wickett from Broward County, Florida. ... [more]  

Rhode Island is the second most densely populated stateun the USA , and its 420 miles of coastline are crowded with homes and businesses, residents and tourists. The increasing rate of erosion and sea level rise, and the effects of coastal storms and flooding, are making the state’s coastal landscape ever smaller. ... [more]  

Garmin, the global leader in satellite navigation, has announced a new line of echoMAP combination chartplotters that integrates scanning sonar capabilities without the need of an additional sounder black box. Along with a user-friendly interface and built-in cartography, the new echoMAP series proves to be a valuable tool for boaters and anglers of all types. ... [more]  

Garmin, the global leader in satellite navigation, has announced the GSD 25, a premium sonar module that offers traditional sonar, 1kW CHIRP, CHIRP DownVü and CHIRP SideVü scanning sonar for a versatile, all-in-one black box. The GSD 25 is the ultimate solution for the boater or angler that requires both scanning capabilities and traditional sonar. ... [more]  

Applications are now open for exhibitors to secure their space at the 2015 Brisbane Tinnie and Tackle Show. The Show will provide a unique hands on experience and diverse product range to patrons when it teams up with the Explore Australia Expo and moves on the water to the Manly Harbour precinct in early March 2015. ... [more]  

Coral reef fin fish will be off limits for the second of two annual closures that protect these fish during the spawning season. Queensland Boating and Fisheries Patrol (QBFP) district manager Greg Bowness said: 'The closed season starts immediately after midnight at the beginning of 19 November and ends immediately before midnight at the end of 23 November,' Mr. Bowness said. ... [more]  

The new assets will significantly boost the emergency capability of Marine Rescue NSW volunteers on the State’s Illawarra Coast. Deputy Commissioner Storey said, 'Shellharbour 30 is a 10 metre Naiad, able to travel up to 30 nautical miles offshore and it will become an important part of Marine Rescue’s strategic search and rescue safety net of offshore vessels covering this region. ... [more]  

It’s one of those wonderful sayings you hear around the quay or bar a lot. It’s mostly spoken when someone makes an obvious and usually very public mistake. It is one of those classic, laconic and ironic statements. It is as Australian as calling people by their Surname, especially if it is shortened, or even lengthened, by adding a ‘y’, ‘o’ or ‘ie’ to the end of it. ... [more]  

2014 Yamaha Cod Classic - The time has come again to catch a famous Murray Cod at Australia’s richest freshwater fishing tournament, the most eagerly anticipated fishing social event of the year! An expected 3000 anglers and 1400 boats will take to the Murray’s Lake Mulwala in an attempt to hook the winning catch for a share of the $150,000 worth of cash and prizes. ... [more]  

Auckland Airport has chosen an innovative Rayglass ProJet to help protect its flights from the possibility of bird strike. The airport’s Rayglass ProJet, named Kaitiaki Rangi or 'Guardian of the Skies', operates around the edges of the airport’s runways, scaring away the birds, especially swans, that sometimes congregate on the nearby banks ... [more]  

The fourth annual No Motor Tournament is set to kick off Saturday, November 8th and to make this event even more fun - and potentially rewarding. ... [more]  

‘Fish Friendly Marina’ accreditation is an information campaign and accreditation system focusing on marina fish habits and was developed initially by the Marina Industries Association (MIA) and the NSW Boating Industry Association (BIA) in collaboration and consultation with government and EPA authorities. ... [more]  

The 60 tonne vessel was scuttled this morning at popular fishing spot, Harry Atkinson Reef, 7 km east-south-east of St Helena Island. The Port of Brisbane offered the boat to the Moreton Bay Marine Park Authority a few months ago. The government bought it from the Port of Brisbane for $1. ... [more]  

A sold out 'Save Our Seas' themed fundraiser held at the IGFA Fishing Hall of Fame Saturday, November 1st was a memorable night for marine wildlife artist and scientist Dr. Guy Harvey, whose foundation generated over $200,000 in revenue to fund leading-edge marine science, conservation and education. ... [more]  

Tonic releases Blue Mirror Limited Edition by Tonic Polarised Eyewear
Available in Tonic’s popular Evo and Shimmer frame styles, the Limited Edition is a stylish solution for high-glare conditions. The Blue Mirror lenses were specially developed for Australian anglers and outdoor enthusiasts, and share their high-tech optics with all of Tonic’s growing range of lightweight polarised optical glass lenses. ... [more]  

The Victorian Government has taken steps to grow the state’s sea urchin fishery by introducing a new licensing and quota system, providing fishers with more secure access and business certainty. Fisheries Victoria Executive Director Ross McGowan said the new system would give urchin fishers greater security and confidence to invest in their businesses and to develop local and overseas markets. ... [more]  

Recreational Fishers renew support for Prime Minister’s ban by Australian Recreational Fishing Foundation
The Australian Recreational Fishing Foundation (ARFF), the national body representing Australia’s recreational fishing community, today reconfirmed its support for Prime Minister Tony Abbott's ban on supertrawlers. The Prime Minister announced his ban on these industrial fishing boats in March this year. ... [more]  

Victorian Premier Denis Napthine today unveiled a $65 million Better Bay Plan and announced that commercial netting in Port Phillip Bay and Corio Bay will be phased out. Dr Napthine said the comprehensive plan focused on preserving and rehabilitating one of the state’s best assets, while also building important community infrastructure to enable more people to enjoy Port Phillip Bay. ... [more]  

Nova Southeastern University (NSU) announced that Guy Harvey and the Guy Harvey Ocean Foundation are providing a very generous financial gift that will allow students, faculty and other researchers at NSU’s Oceanographic Center to enhance their work and also provide scholarships to undergraduate and graduate students studying marine biology. ... [more]  

In the upcoming season, a recreational slot limit of 55-75cm will apply to all Murray cod caught in Victorian and NSW waters, from the opening of the Murray cod season on 1 December. Minister Walsh and Minister Hodgkinson agreed it was necessary to have consistent size limits. ... [more]  

Fishers are reminded that barramundi are off limits in Queensland east coast waters from noon 1 November 2014 until noon 1 February 2015. Queensland Boating and Fisheries Patrol district officer Robert Ibell said the closure was in place to protect barramundi stock during their spawning season. ... [more]  

Superior wins 2014 ISS Excellence in Innovation Award for Waterscape
Sanctuary Cove Boat Show - Marine industry invited to jump on board
New online service helps turn your unwanted Boat Bitz into cash
Eagle One luxury motoryacht – seeking new owner
Ten crucial actions to save the Great Barrier Reef
Henri Lloyd's famous summer sample sale on now
Where is the Deepwater Horizon oil?
Fisheries enforcement blitz targets snapper anglers
Fort Lauderdale International Boat Show - Australia among the best
Wahoo Smackdown V attracting record number of anglers
Guy Harvey Outpost launches Data Collection Fishing App
sMRT Inflatable SOS Dan Buoy selected by judges for METS Dame Awards
Girringun Ranger exercise targets illegal activities
Arrested development – sediment wreaks havoc with fish larvae
Tauranga Boat Expo - Lancer and Sea Blade attend for the first time
Safer Boating Week: New Auckland Council Navigation come into effect
NMMA loses E15 fuel U.S. Court of Appeals Decision
High profile anglers support Rec. fishing reserve for Port Phillip
Marine Rescue Iluka Yamba towing disabled fishing vessel to safety
Explore Australia Expo and Brisbane Tinnie and Tackle Show join forces
METS names DAME Award nominees   
New improved swell forecasting and more locations from PredictWind   
A Sailor's Dream Home: View after the Coastal Classic - Auction 22 Nov   
Brisbane Tinnie and Tackle Show moving to Manly Harbour in 2015   
Partnership to encourage lifejacket use   
2014 Gold Coast International Marine Expo: Another outstanding success   
Guy Harvey Fisheries Symposium announced for November 13-15   
Safer Boating Week boosted by short, snappy, safety tips clip   
2014 Gold Coast International Marine Expo - Marine Syndication wins   
Coast Guard rescues two near Wachapreague   
2014 Gold Coast Int'l Marine Expo - McDonald’s boosts the family fun   
Sheltering habits help sharks cope with acid oceans   
Dutch boy on a mission to rid the world's oceans of floating plastic *Feature   
Discover Boating Week starts tomorrow   
Great start to another massive Gold Coast International Marine Expo   
Changed boating conditions on Sydney Harbour for Australian Boat Race   
Whale freed from net at Rainbow Beach   
2014 Gold Coast Int'l Marine Expo - One more sleep until massive event   
Boats recovery after Sydney storm   
Partnership to encourage lifejacket use   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW FBW
LocalAds   DE  ES  FR  IT