Powerboat-World.com
 
 
News Home Video Gallery Newsletters Features FishingBoating Photo Gallery Sail-World Australia Australian Cruising
Sail-World Australia Australian Cruising MarineBusiness-World
Sail-World.com : Killer solution for the Crown of Thorns starfish
Killer solution for the Crown of Thorns starfish

'Close up image of the Crown of Thorns Starfish.'    ARC Centre of Excellence Coral Reef Studies ©

An Australia-based team of marine scientists has established what may prove an effective control for the dreaded Crown of Thorns starfish (COTS), which intermittently ravages coral reefs across the Pacific and Indian Oceans.

With signs that the starfish is building up for another huge attack in the Pacific and Australian region, their solution could come in the nick of time.

The researchers, from the ARC Centre of Excellence for Coral Reef Studies (CoECRS) at James Cook University (JCU) have discovered that a harmless protein mixture used to grow bacteria in the laboratory can destroy the starfish in as little as 24 hours.

If subsequent tests show it is safe for other sea life, their breakthrough could yield a dramatic improvement in ability to control of COTS outbreaks, even if only to protect sites that are intensively used for tourism.

'A Crown of Thorns outbreak can destroy from 40-90 per cent of the corals on a reef. Over the past 50 years it has caused more damage than bleaching,' says Dr Jairo Rivera Posada 'There were massive outbreaks in many countries in the 1960s and 1980s – and a new one is well underway on the Great Barrier Reef.'

Dr. Posada, who trained as a vet before switching to marine research, was on the beach with Professor Morgan Pratchett of CoECRS at Lizard Island in the Northern Great Barrier Reef when he wondered if the substance he was using in the lab to selectively culture the Vibrio bacteria that naturally inhabit the starfish could give the bugs enough of a boost to damage their host.

Rushing back to their tanks, they quickly injected five starfish with the media culture solution – made from carbonates and proteins extracted from animal tissues – and were astonished when the starfish rapidly began to fall apart and die as the bacteria attacked them.

'I was only hoping to impair their immune systems – so the fact that they died so quickly was a great surprise,' Jairo says.

Looking more closely, the researchers found that the solution had caused the bacteria to bloom and attack the starfish; at the same time the starfish suffered an acute allergic reaction to the unfamiliar animal proteins (mainly derived from cattle). Furthermore, the bacteria also spread under favourable conditions to other starfish which came in contact or close to the infected individual.

Crown of Thorns Starfish eating a coral colony. -  ARC Centre of Excellence Coral Reef Studies ©  


This ‘double whammy effect caused by an otherwise harmless protein mixture has opened up the possibility of developing a safe, convenient and fast way of killing Crown of Thorns starfishes, explains Professor Morgan Pratchett of CoECRS and JCU.

'In developing a biological control you have to be very careful to target only the species you are aiming at, and be certain that it can cause no harm to other species or to the wider environment. This compound looks very promising from that standpoint – though there is a lot of tank testing still to do before we would ever consider trialling it in the sea.'

Prof. Pratchett says starfish outbreaks in the vicinity of specific tourist sites are currently controlled using a poison injection delivered by a diver – but we need to find more effective and efficient control methods if we are to scale-up control programs.

Dr. Rivera adds that the protein solution needs only a single jab into a starfish, enabling a diver to kill as many as 500 Crown of Thorns in a single dive – compared with 40 or so using the poison injection. Nevertheless, stopping an established outbreak of millions of starfish will not be feasible. It is already too late to stop the current outbreak, they say.

'In the current COTS outbreak in the Philippines they removed as many as 87,000 starfish from a single beach. This gives you an idea of the numbers we have to deal with,' he adds. Other fresh COTS outbreaks have been reported from Guam, French Polynesia, Papua New Guinea, and the central Indian Ocean.

The team is about to embark on extensive testing to establish the technique is safe for use around corals, fish, other types of starfish, sea urchins and sea cucumbers.

They are also exploring other natural parasites and disease-causing organisms for controlling Crown of Thorns, as well as simple protein injections which trigger a fatal allergic reaction. However, any attempts to control these outbreaks will be futile without also addressing the root cause of outbreaks, including loss of starfish predators as well as increased nutrients that provide food for larval starfishes.

ARC Centre of Excellence for Coral Reef Studies website


by ARC Centre of Excellence for Coral Reef Studies

  

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

http://www.powerboat-world.com/index.cfm?nid=102729

4:16 PM Mon 8 Oct 2012GMT


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







Power Boat News

Dangerous conditions forecast for NSW boaters by Roads and Maritime Services,










Abbot Point onshore disposal by Great Barrier Reef Marine Park Authority,










Great Barrier Reef plan released for comment by Queensland Minister for Environment,










Brisbane Boat Show begins *Feature by Jeni Bone,




































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
Dangerous conditions for boaters on most of NSW coast
2014 Mandurah Boat Show - Third largest boat show in Australia
2014 Gold Coast International Marine Expo - Eye on the big picture
Mediterranean Grand Prix - Powerboat racing heavyweights head to Ibiza
Mediterranean Grand Prix - World Aquabike stars all set
Antarctic sea-level rising faster than global rate
Powerboat champions gear up for Honda RYA Youth RIB National final
Andrew Scott joins Superior as General Manager *Feature
2014 Gold Coast International Marine Expo - Fastest Jet Ski ever built
Best Birthday Party ever at Southport Yacht Club! *Feature
‘Hall of Fame’ status for Empire Marina *Feature   
Girl power all set for Nottingham powerboat racing action   
Cowes to Torquay Race 2014 - Intense activity in preparation   
Fort Lauderdale International Boat Show - 13 things to See and do   
Australian Offshore Superboat Champ - 15 Superboats in Coffs Harbour   
European première for Belize 54 Daybridge at Cannes Yachting Festival   
‘Fish Friendly’ accreditation for Sanctuary Cove Marina   
Plethora of Powerboat racing action this weekend   
Vicsail Boat show Open Day at Rushcutters Bay   
Marine15 - prospectus available online now + VIDEO *Feature   
Southport Yacht Club achieves Clean Marina certification + VIDEO *Feature   
Port Kembla Volunteers bring in 75 metre monster from 5nm offshore   
Gold Coast Int'l Marine Expo - Make every moment one to remember   
Dangerous conditions for boaters from Queensland border to Sydney   
4x4 Outdoors Show and Fishing and Boating Expo - Busy opening day   
Summerland 40 LR named Boat of the Year   
More new boats brand Brisbane Boat Show as a spectacular showcase   
Xiamen Int'l Boat Show 2014 moving to a new home   
Yamaha inspires students to succeed   
NSW EPA supports Marina Industry Environmental Accreditation   


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