Powerboat-World.com
 
 
News Home Video Gallery Newsletters Features FishingBoating Photo Gallery Sail-World Australia Australian Cruising
MarineBusiness-World

 

Sail-World.com : Pollution triggers genetic resistance mechanism in Hudson River fish

Pollution triggers genetic resistance mechanism in Hudson River fish

'Tomcod from the Hudson River have a variant protein that makes them less sensitive to the toxic effects of PCBs. The effects of PCBs occur through their interaction with a protein called Aryl Hydrocarbon Receptor 2 (AHR2). AHR2 is normally inactive, but when PCB molecules bind to it, AHR2 becomes activated and acts as a molecular switch to turn on other genes that lead to toxicity (“Effects” in the figure). Tomcod such as those from Shinnecock Bay, Long Island, NY (left panel) have a normal ve'    Woods Hole Oceanographic Institution (WHOI) ©

For 30 years, two General Electric facilities released about 1.3 million pounds of polychlorinated biphenyls (PCBs) into New York’s Hudson River, devastating and contaminating fish populations. Some 50 years later, one type of fish—the Atlantic tomcod—has not only survived but appears to be thriving in the hostile Hudson environment.

Researchers from Woods Hole Oceanographic Institution (WHOI) have joined colleagues from New York University (NYU) and NOAA to investigate this phenomenon and report that the tomcod living in the Hudson River have undergone a rapid evolutionary change in developing a genetic resistance to PCBs.

Although this kind of reaction has been seen when insects develop resistance to certain insecticides, and bacteria to antibiotics, 'This is really the first demonstration of a mechanism of resistance in any vertebrate population,' said Isaac Wirgin of NYU’s Department of Environmental Medicine and leader of the study. Moreover, he said, the team has found that 'a single genetic receptor has made this quick evolutionary change possible.'

The findings, reported online in the Feb. 17 issue of Science, provide a first look at 'natural selection going on over a relatively short time, changing the characteristics of a population,' said WHOI Senior Scientist Mark E. Hahn, who, together with WHOI biologist Diana Franks, collaborated with Wirgin on the study. 'It’s an example of how human activities can drive evolution by introducing stress factors into the environment.'

Looking at the ability of the fish to respond to the contaminants, the researchers found the primary changes occurred in a receptor gene called AHR2, which is important in mediating toxicity in early life stages and can control sensitivity to PCBs. In his work over the last 16 years in the Acushnet River Estuary near New Bedford, Mass., biologist Hahn has found the same gene involved in controlling other fishes’ responses to PCBs.

The AHR2 proteins in the Hudson Rover tomcod, he said, appear to be missing two of the 1,104 amino acids normally found in this protein. This causes the receptor to bind more weakly with PCBs than normal, suggesting a reason why the contaminant does not affect the tomcod in this location as much as it does tomcod in other locations. The Hudson River tomcod 'are not as sensitive to PCBs,' Hahn said. 'The mechanism by which PCBs cause toxicity is dampened in this population.'

While this may be good news for the tomcod, it may bode not so well for their predators, and even humans. 'The tomcod survive but they still accumulate PCBs in their bodies and pass it on to whatever eats them,' Hahn said.

Wirgin noted that tomcod spawn in the winter, and in the summer become 'a major component of the diets of striped bass and other fish.' This can lead to 'an abnormal transfer of contaminants up the food chain,' perhaps all the way to humans who may consume them.

In addition, the tomcod’s genetic changes 'could make them more sensitive to other things,' and affect their ability to break down certain other harmful chemicals, such as PAHs (polycyclic aromatic hydrocarbons), Hahn said. 'So it’s conceivable that the Hudson River tomcod could be more susceptible to PAHs because it cannot degrade them properly,' he said.

Also, he added, these receptors are involved in normal development, and a genetic change could lead to a change in a fish’s health. 'There could be evolutionary costs,' Hahn said. 'We don’t know yet what they are but it’s something that needs to be considered.'

'Hudson River tomcod have experienced rapid evolutionary change in the 50 to 100 years since release of these contaminants,' the researchers say in their paper. Added Wirgin: 'Any evolutionary change at this pace is not a good thing.'

Ironically the recently begun EPA-mandated cleanup of Hudson River PCBs could be trouble for the tomcod. If there are evolutionary costs to having the variant AHR2 gene, the absence of the toxic substance that triggered its adaptation might leave it at a disadvantage.

'If they clean up the river,' Wirgin said, 'these fish may need to adapt again to the cleaner environment.'

The WHOI portion of the study was funded by an NIH Superfund Research Program Center grant through the Superfund Research Center at Boston University.

The NYU work was funded by an NIH Superfund Research Program individual grant and an NIH Environmental Health Sciences Center grant.

'This research could not have been attempted without the unique multidisciplinary focus of our funding vehicle, Superfund Basic Research,' Wirgin said.

http://www.whoi.edu/




by Woods Hole Oceanographic Institution

  

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

http://www.powerboat-world.com/index.cfm?nid=80826

8:12 AM Mon 28 Feb 2011 GMT






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


Power Boat News

Minister for Natural Resources, Lands and Water, Kevin Humphries and Minister for Roads and Freight Duncan Gay have announced the successful tender for the dredging of Swansea Channel has been awarded to Neumann Dredging Pty Ltd. ... [more]  

Have trailer, will travel *Feature by Jeni Bone
All Marine Spares were out in force at last weekend’s Upper Hawkesbury Power Boat Club Spectacular, which drew local and interstate participants and enthusiastic crowds numbering in the several thousand. ... [more]  

Auckland On The Water Boat Show: Images from the final day by Richard Gladwell, Sail-World.com/nz
The Auckland International Boat Show concluded today having enjoyed four days of moderately acceptable weather. Attendance figures have not yet been announced however they are expected to be close to or exceed last year's Show. ... [more]  

Mr Priddy hopes to shave up to seven days off the current powerboat record of 60 days 23 hours 49 minutes, held by New Zealander Pete Bethune. He will make the formal announcement at the Fathom Ship Efficiency Conference in London on Wednesday October 1st. The boat has been designed by Professor Bob Cripps, former Technical Director of VT Halmatic. ... [more]  

A new provisional World Record was set on the Viaduct Harbour today with 52 paddlers covering the 100 metre course on the Lancer SUP. There were no incidents in the attempt - which sets a new mark category in the Guinness World Records. ... [more]  

Marine Rescue Forster-Tuncurry has been named a winner in the 2014 NSW Water Safety Awards, taking out the prize for the Water Safety Event of the Year. The Award, presented tonight, is for the unit’s successful Water Expo, staged in January at the peak of the summer holiday and boating season. The award was accepted by Deputy Unit Commander Ray Mazurek. ... [more]  

Marine Rescue NSW volunteers have been recognised for their enormous contribution to safety on the water, with the rescue service taking out a prestigious title at the 2014 NSW Water Safety Awards. MRNSW won the Most Outstanding Contribution to Water Safety by an Organisation category at the annual awards, presented tonight. ... [more]  

An attempt will be made on Saturday afternoon set set a new Guinness World Record mark for the most people on a Stand Up Paddleboard (SUP) The SUP used for the record attempt will be supplied by leading New Zealand inflatable manufacturer, Lancer Industries, and the SUP uses Lancer's AirDock technology.. ... [more]  

Rescue vessel Point Danger 30 from Marine Rescue Point Danger base, went to the aid of a yacht with mechanical and sail failure shortly before 10 o’clock this morning. The yacht, with three people on board had been experiencing strong winds east of Cook Island off the coast of Northern NSW and was forced to seek help when its engine failed and mainsail blew out. ... [more]  

Having grown into the world’s largest marine motorsport brand over the last 12 years, Powerboat P1 has announced plans to take its SuperStock powerboat and AquaX jet ski race series to Singapore next year as a first step to racing throughout the region. ... [more]  

Sail-World did a quick tour of the on the water exhibits at the Auckland On The Water Boat Show. Her's a quick selection of some of the almost 200 boats on the water in the Viaduct Harbour. ... [more]  

The Auckland On The Water Boat Show opened this morning in brilliant Spring sunshine. Based on the Viaduct Harbour, Auckland, there are nearly 200 exhibiting companies and over 200 boats are at the event which runs through to Sunday September 28. ... [more]  

RBT only applies when vessel is underway by Boating Industry Association
Following some reports RBT testing was occurring whilst at anchor, Michael Drake Principal Manager Boating Safety, Maritime Management Centre, Transport for NSW, has confirmed with RMS legal team that 'RBT only applies when a vessel is underway (i.e. not at anchor, moored or berthed at a wharf or marina)'. ... [more]  

BIA and MIMRA at RMS Boating Safety Day! by Boating Industry Association
BIA and MIMRA will be promoting our 50 Point Safety Check on Sunday the 28th of September, Bayview Boat Ramp, Rowland Reserve, Pittwater Road, Bayview from 10:00 am running until 2:00 pm. ... [more]  

Iridium have recently released the Iridium GO!, their latest product in the satellite communication market. It’s portable, battery powered, and creates a WiFi hotspot. www.predictwind.com!PredictWind!new have partnered with Iridium to put together a package catering specifically to the marine market. ... [more]  

The flagship of Riviera’s award-winning Sport Yacht collection is supremely comfortable with innovative alfresco lifestyle concepts, ultramodern marine technology and palatial appointments – a high-performance yacht akin to a floating six-star resort. ... [more]  

Growing affection for high-end luxury power boats boasting a noble and nostalgic design has inspired the new 54 Daybridge from award-winning boat-builder Belize Motoryachts. ... [more]  

These are some life’s great pleasures and ones you really do want to share. After all, if something has been finely crafted, it’s almost one’s duty to indulge others in the pleasures you’re partaking. Now ever since Aranui's significant keel was first laid down, this 40 footer has been a talking point and it was not long before Corsair Boats were on to building another Bass Straight Motor Yacht ... [more]  

Bristling with innovation, technology and time-honoured craftsmanship, Riviera’s new 515 SUV and 50 Enclosed Flybridge will make their West Australian premieres at the 2014 Mandurah Boat Show from October 10 to 12. ... [more]  

South Australian marinas and yacht clubs are planning a full day of predominantly free on-water and land based events on Sunday 12th October for people to experience the boating lifestyle first-hand and learn how easy it is to get involved. ... [more]  

Making its debut at the Gold Coast International Marine Expo, the BRIG Navigator 700 is 7-metres of versatility and durability, with room for 11 people in comfort – 12 in the twin engine version. ... [more]  

Marine Auctions at Runaway Bay hosted their first auction to welcome in Spring with a bevy of boats and marina berths up for purchase. ... [more]  

Digital is an important aspect of today's marketing mix and the marine industry has begun to embrace its importance. ... [more]  

Win an Electronic Device of Your Choice to the Value of $750 for Your Best Profit Idea. ... [more]  

John Crawford never dreamed a love of messing about on boats would lead to the creation of an empire. The Queensland boating identity has come a long way since his obsession for all things marine led him to set up a boatyard on the Wynnum Esplanade in 1964. ... [more]  

The operator of a Portsmouth-based barge has today been made to pay almost £111,000 in fines and costs after pleading guilty to a breach of maritime legislation. Serco Ltd admitted an offence at Portsmouth Crown Court in relation to the health and safety of workers aboard the barge 1706, which is operated as part of a service contract with the Ministry of Defence. ... [more]  

You scratched my seagrass! by Steven Katona, Newport, RI
Sailors for the Sea publishes monthly articles that translate the language of marine science into fascinating articles about ocean health. ... [more]  

Join us on Boating Safety Day on 28 September by Roads and Maritime Services
Boating Safety Day is a free community event for the whole family. Join us across NSW on Sunday 28 September, between 10am and 2pm, enjoy a range of marine activities and learn about safe and responsible boating. ... [more]  

The closed waters area between Indian Head and Waddy Point at Fraser Island will re-open to the taking of finfish from midday Tuesday 30 September. Queensland Boating and Fisheries Patrol (QBFP) district officer Geoff Fergusson said the closure was in place to protect finfish during their breeding cycle. ... [more]  

Lancer Industries Ltd returns to the Auckland On Water Boat Show after almost a decade away. It will mark several significant events for Lancer including new pricing, a Guinness World Record attempt and an Introduction to Sea Blade. The Lancer stand is located beside the ETNZ building. ... [more]  

Dangerous conditions forecast for NSW boaters by Roads and Maritime Services
Roads and Maritime Services has issued an alert after a Bureau of Meteorology warning about dangerous surf conditions from Gabo Island to Tweed Heads developing tomorrow, Sunday 21 September. ... [more]  

Visitors to this year’s his year's Genoa International Boat Show will find the event 'renewed and more dynamic', adapting to the needs of an industry that is just beginning to see Spring at the end of a long hard Winter. Exhibitor numbers are up on last year, with sailing boats and small-to-medium sized motor boats leading the charge. The show will have a new layout ... [more]  

Exhibitors have chosen to go big, with luxury brand, Riviera, displaying $10,500,000 worth of boats in the Viaduct Harbour and four boats designed by local company Roger Hill Yacht Designs, worth $5,500,000 on show. The four Hill-designed yachts are the striking 17-metre Voodoo, built by Pachoud Yachts, 14.95-metre Tribute, 13.1-metre Notorious and an 8.9m ArrowCat. ... [more]  

Ten safe and clean refueling tips for boaters
Mercury heads field in ski racing’s World Championship selection
Abbot Point onshore disposal
New Zealand's largest on water boat show kicks off next Thursday
Auckland Water Boatshow: Practice session for Guinness World Record
Brisbane to host new boat show at Manly on Moreton Bay *Feature
2014 Honda RYA Youth RIB Champions crowned + video
Great Barrier Reef plan released for comment
Superior prepares for Monaco Yacht Show debut *Feature
Sharks more abundant on healthy coral reefs
RYA Advanced Powerboat Handbook unveiled at PSP Southampton Boat Show
Brisbane Boat Show - Opens with great attractions and innovations
Brisbane Boat Show begins *Feature
P&O and Princess Cruise Ships to continue operating into Abell Point
No more XCAT action in China this year, but landmark agreement signed
Yamaha major sponsor of 2014 Rip ‘n Ride 7
Superboat Champ: Maritimo well positioned as race series nears its end
Command Thrust outboards with Counter-Rotation find eager market
Southport Yacht Club celebrates opening of 68th season *Feature
Brisbane Boat Show starts Friday - biggest in 10 years! *Feature
Marine Auctions adds new recruits   
Ministerial advisory group launched by united marine industry sector   
2014 Auckland on Water Boat Show: Coming up at the end of September   
Australian research sheds light on ocean garbage gyres *Feature   
Round the World racer joins Southern Pacific Inflatables   
2014 Gold Coast Int'l Marine Expo - Quintrex factory opens its doors   
Mediterranean Grand Prix - Pons and Chris win the titles   
18 anti-piracy weapons for ships to fight pirates   
Skysol Frame Large: A new shading solution for sunroofs   
Mediterranean Grand Prix 2014 - Wins for Victory and Chaudron   
Mediterranean Grand Prix, UIM-ABP Tour: Pons claims Runabout GP1 win   
Mediterranean Grand Prix - Al Zaffain and Bin Hendi win race 1   
Court judgement a stark reminder about towing safety   
Australian Offshore Superboat 2014 - Superboats ready for Redcliffe   
Southport Yacht Club’s annual Sail Past and Blessing of Fleet Ceremony   
Gosport Grand Prix of the Sea finale to decide P1 champions   
Camper & Nicholsons Yachts presents the Sagitta 42   
GT15 and GT30 European Championships - Jelf takes to the podium twice   
Marine Rescue crew saves cruiser in trouble in rough conditions   
XCAT Series gets set to conquer another continent in 2015   


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/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 PBW
LocalAds   DE  ES  FR  IT