>
 
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 : Freshwater Jellyfish discovered in Ireland
Freshwater Jellyfish discovered in Ireland


'Craspedacusta sowerbii'    Environment Protection Agency    Click Here to view large photo

One angler's disbelieving discovery in Ireland has led to a surprise new marine wildlife find for Ireland's inland waterways.

Pat Joyce, from Limerick, nearly fell off his fishing stand when, in early August, he spotted what looked like a single small jellyfish pulsing in the water in front of him.

The jellyfish disappeared and Joyce thought that perhaps he was mistaken since, as everyone knows, 'there is no such thing as a freshwater jellyfish'.

Two weeks later, again angling for bream in the tranquil surrounds of an Irish Harbour, Joyce noticed not one but hundreds of tiny jellyfish moving on and below the surface.

He immediately contacted the Environment Protection Agency (EPA) to seek clarity, and they put him on to Inland Fisheries Ireland (IFI). Staff from the IFI sped to the scene and collected up to 20 live specimens. They really did exist!

IFI’s Colum Walsh and Dave Germaine contacted Dr Joe Caffrey, invasive species specialist with IFI, who immediately organised a site visit to the Irish harbour with a team of marine science experts. These included Dr Tom Doyle, a jellyfish expert from the Coastal and Marine Research Centre in UCC, and Dr Dan Minchin.

The survey revealed small numbers of the jellyfish on the harbour, but specimens were also recorded from two other locations within the lake – at Rossmore Harbour and at Dromineer.

So what is this jellyfish, where did it come from and why was it never spotted in Ireland before?

As soon as specimens were collected IFI forwarded them to Dr Doyle, who identification them as the free-swimming life stage of a species called Craspedacusta sowerbii. This marks the the first official record for this species in Ireland.

This freshwater jellyfish hails from the Yangtze River Valley in China but currently has a worldwide distribution. It was initially discovered in exotic aquatic plant tanks in Regent’s Park, London in 1880 but has since spread to widely throughout the globe.

The jellyfish is about the size of a euro coin and broadly resemble their marine cousins. It is more or less transparent with a distinctive white/greenish cross and a white/cream circular outline, and possesses in the region of 250–300 small tentacles.

These jellyfish have two distinct life stages; one is a tiny attached polyp and the second is what we know as the jellyfish or medusa stage. The polyp buds off medusa under warm water conditions, generally when water temperature reaches 25 degrees centigrade.

The species is known to occur in single sexed populations, and Dr Doyle confirmed that all of the specimens he examined from Lough Derg were female.

It is probable that the discovery of this jellyfish relates to the wonderfully warm summer that we experienced in Ireland this year, when water temperatures in many watercourses exceeded 25 degrees for prolonged periods. This probably stimulated the budding off of the medusae or jellyfish, which pulsed in the warm water in search of plankton prey. It is noteworthy that jellyfish were also reported from Lough Erne in recent days.

Experience in other countries suggests that blooms of such freshwater jellyfish occur only sporadically and that they last, in any one year, for only a few weeks. So it is possible that we may not see such a sight again for many years.

It is important to state that the freshwater jellyfish is not harmful to humans and that, while they do capture their tiny prey by stinging, the stinging cells are not sufficiently powerful to harm humans.

In addition, the jellyfish do not appear to have any significant effect on the biology or ecology of the waters they are recorded in, probably due to their sporadic occurrence and the short period that the jellyfish blooms are in any water body.

'Anglers are the eyes and ears on our rivers and lakes,' said Minister of State Fergus O'Dowd following this amazing discovery. 'I ask all anglers to continue to assist in the protection and conservation of this resource, reporting any invasive species they come across to the IFI Hotline immediately.'

One serious cause for concern relates to the pathway whereby this jellyfish - and many other non-native and potentially harmful or invasive species - was introduced to Ireland.

The fact that the two watercourses from which the jellyfish was recently recorded (Loughs Derg and Erne) are both internationally renowned navigation waterways suggests that boating and perhaps ballast water from newly introduced craft may represent an important causative agent.

Boats and cruisers are commonly imported from abroad and are introduced into our waters without having to prove that they were cleaned and disinfected before leaving their country of origin.

'This practice is unacceptable and poses a significant threat to biodiversity in our waters and to their functionality, be it as recreational, amenity or municipal waters,' said Dr Caffrey. 'It is imperative that boats being imported into this country carry certificates of disinfection prior to being granted entry if we are to stop the ever-increasing spread of harmful invasive species.'

If you spot jellyfish in your local watercourse, please contact Inland Fisheries Ireland or on the 24-hour hotline 1850 34 74 24. See also the EcoJel project and the of National Biodiversity Data Centre website.


by National Biodiversity Data Centre

  

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

http://www.fishingboating-world.com/index.cfm?nid=115211

4:41 AM Mon 30 Sep 2013GMT


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







FishingBoating-World

Representing superlative achievement with a focus on sustainability, the awards were presented 29 October at the 24th Anniversary of ISS’s Awards Gala in Fort Lauderdale, Florida during the Fort Lauderdale International Boat Show. The Excellence in Innovation Award was accepted by David Hogan, son of Superior CEO, John and Jackie Hogan in front of an international audience. ... [more]  

2015 Sanctuary Cove International Boat Show - After a successful 2014, Mulpha Sanctuary Cove is gearing up for its 27th annual Sanctuary Cove International Boat Show, with exhibitor opportunities opening next week (November 6). ... [more]  

A brand new online classifieds website called Boat Bitz has just been launched specifically focused on helping boat owners clear their unwanted or unused boating and fishing equipment. ... [more]  

Built by one of Japan’s premier shipyards, EAGLE ONE has kept pace with modern luxury with a series of refits, most recently 2014, and is for sale, under $1m. ... [more]  

WWF-Australia and the Australian Marine Conservation Society have released a 10-point plan to save the Great Barrier Reef, in response to the Queensland Government’s Draft Reef 2050 strategy. ... [more]  

The famous Henri Lloyd Summer Sample Sail is in now at the Henri Lloyd showroom in Crows Nest, Sydney! Huge range of samples and discontinued lines from Henri Lloyd's marine, footwear and lifestyle collections for men and women. Discounts of up to 80% off original RRP! ... [more]  

Where is the Deepwater Horizon oil? by Woods Hole Oceanographic Institution
During the 2010 crisis, some of the oil gushing from the seafloor appeared as slicks on the sea surface, while roughly half of it, scientists estimate, remained trapped in deep ocean plumes of mixed oil and gas, one of which was more than a mile wide, hundreds of feet high and extended for miles southwest of the broken riser pipe at the damaged Macondo well. ... [more]  

The illegal take of snapper from Port Phillip, Western Port and Corner Inlet will be the focus of a Fisheries Victoria blitz starting Melbourne Cup long weekend. ... [more]  

2014 Fort Lauderdale International Boat Show - Australia’s leading superyacht organisation, Superyacht Australia will be showcasing the best of Australian brands at 2014 Fort Lauderdale International Boat Show and promoting Australia as a cruising destination for global suoeryacht fleet. ... [more]  

With some 30 boats already committed and at least another 10 anticipated, the November 13-15 Wahoo Smackdown hosted by the Bimini Big Game Club Resort and Marina will be the largest tournament in the history of the popular series. ... [more]  

Mark Ellert, President of Guy Harvey Outpost Resorts and Lodges announced today the launch of the company’s new fishing app, iGHOFISH, created to serve as the record keeper for the company’s new 'Fish for the Future' fishing tournament along with tournament and special fishing events at its Guy Harvey Outpost destinations. ... [more]  

SOS Marine and Mobilarm subsidiary Marine Rescue Technologies ('MRT') announce today that the sMRT Inflatable SOS Dan Buoy is one of the 45 products that have been nominated for final judging by the Design Award METS (DAME) 2014 jury. The products have been selected from a total of 116 entries from 23 nationalities from all over the world. ... [more]  

Conducting patrols in the sky, on the land and on the sea was all in a weekend’s work for Indigenous rangers at an exercise near Townsville this month, as part of efforts to spot and report illegal activities. The Girringun Aboriginal Rangers, who patrol the waters between Rollingstone Creek and Maria Creek, participated in a two-day training and surveillance operation hosted by the GBRMPA. ... [more]  

Sediments associated with dredging and flood plumes could have a significant impact on fish populations by extending the time required for the development of their larvae, according to Australian researchers. 'Sediment concentrations at levels found in plumes from dredging or in floods cause a significant delay in the development of clownfish larvae,' says study lead author, Dr Amelia Wenger. ... [more]  

The Tauranga Boat Expo has proven a popular attraction for marine enthusiasts outside the main centres. This year, Lancer has chosen to join the show as part of their tour introducing the market to Sea Blade as well as their other exciting products. ... [more]  

Safer Boating Week ended Friday, but with the start of Labour weekend here, there’s no better time to check your boat is safe and prepared to get out on the water over summer. Coinciding with Labour Weekend, new Auckland Council Navigation bylaws also come into effect from Saturday. ... [more]  

NMMA loses E15 fuel U.S. Court of Appeals Decision by National Marine Manufacturers Association
While the battle in the U.S. over E15 might seem a local issue, its plainly has world-wide flow though for the recreationa marine market.The Engine Products Group, a coalition of organizations that includes NMMA, sought to block the EPA decision. ... [more]  

In an unprecedented show of unity and purpose, five of Australia’s top fishing and TV personalities have joined the call for the next government of Victoria to establish Port Phillip Bay as a recreational fishing reserve. ... [more]  

This afternoon Marine Rescue Iluka Yamba was sent to the aid of a commercial fishing boat from Wooli with a disabled engine adrift 15 nautical miles east of Sandon River, south of Yamba. Rescue vessel Iluka Yamba 30 located the fishing boat at 5:30pm approximately 24m south east of Yamba. It had drifted 3 nm from its original position and is now under tow to Yamba. ... [more]  

This partnership brings together two truly functional and enthusiastic events for what will become Australia’s premiere 4x4 and marine super expo. But it doesn’t end there. The ethos behind Explore Australia Expo is to substantially grow the consumer pool by enticing and engaging not only the converted enthusiast but also newcomers and those within parallel or fringe categories. ... [more]  

The organisers of METS have revealed that 45 products have been nominated to go forward for final judging by the jury of the prestigious Design Award METS (DAME) 2014 competition. The products have been selected from a total of 116 entries from 23 nationalities all over the world. ... [more]  

PredictWind have made significant improvements to the swell forecasting models and added new locations. Integrating the new 50km global wind forecast with ocean current data has created the most advanced swell modelling available online. By combining PredictWind forecast data with ocean current data, the effect of the wind on swells can be accounted for ... [more]  

Imagine finishing the Coastal Classic and relaxing in your own waterfront home at Opua with your boat tugging gently on a deep-water mooring off the lawn. Built to an architect design in 2000, this north-facing waterfront Opua property is a short walk to the marina and boatyard. It is going to auction on November 22. View this Labour Weekend after the Coastal Classic. ... [more]  

The event has historically been conducted at the Brisbane Showgrounds, however as a result of the significant construction and redevelopment of that venue, it has presented many operational difficulties in continuing todeliver a high quality event expected by exhibitors andvisitors to an industry boating showcase. ... [more]  

MMC has presented PaddleNSW with 50 new generation lifejackets so its coaches and instructors can help role model behaviour to further encourage everyone on the water to wear lifejackets. 'The lifejackets will be used to kit out PaddleNSW’s network of training staff and volunteers in key locations across NSW,' said MMC General Manager Howard Glenn. ... [more]  

The Australian marine industry is singing the praises of the fourth annual Gold Coast International Marine Expo, reporting strong sales and even greater prospects in the lead-up to summer. 'Based on exhibitor feedback, the total sales at the Expo alone would certainly be in the order of tens of millions of dollars,' she said. ... [more]  

A panel of experts will offer critical suggestions on how post-Gulf of Mexico oil catastrophe research funds should be spent. The panel is just one of the key marine presentations at the Guy Harvey Fisheries Symposium at the University of South Florida St. Petersburg Campus. ... [more]  

Coastguard Boating Education has produced a short, snappy two minute motion-graphic as a great reminder of all the key boating safety tips. ... [more]  

2014 Gold Coast International Marine Expo - Marine Syndication, a division of Marine Auctions, was in full swing at the Gold Coast International Marine Expo that took place at the Gold Coast Marine Precinct in Coomera. ... [more]  

Watchstanders at Coast Guard Sector Hampton Roads received a report from a concerned friend at 10:30 p.m., Friday stating the two men had departed on a planned 20-minute trip, but had been gone for approximately two hours. The reporting source also stated that the men did not have radios or cell phones aboard. ... [more]  

2014 Gold Coast International Marine Expo - The awe-inspiring aerial antics of the Extreme High Diving show at this weekend’s 2014 Gold Coast International Marine Expo have a whole new flavour, with McDonald’s signing up as an event partner. ... [more]  

A shark’s habitat can reduce its sensitivity to rising CO2 levels, according to Australian scientists. Globally, ocean acidification – linked to emissions of greenhouse gases – remains a major concern and scientists say it will harm many marine species over the next century. ... [more]  

Boyan Slat is a 20-year-old on a mission - to rid the planet's oceans of floating plastic. He has dedicated his teenage years to finding a way of collecting it. But can the system really work - and is there any point when so much new plastic waste is still flowing into the sea every day? ... [more]  

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
Most boaters start the new boating season safely
Help stop spreading of the invasive Quagga mussel
Discover Boating Week opens up opportunities to participate
Changed boating conditions for Yarrawonga Multisport Festival
605 Sportsfish named Australia's Greatest Boats 2015 Finalist!
Vaughan Bullivant cuts Daydream Island price tag to $30 million
Update: Stunning finds from ancient Greek Shipwreck
Coalition invests in Campaspe River health
Whale expert to join HMB Endeavour on Eden Voyage
Gold Coast International Marine Expo - Boats to behold … and much more
Superior set for METS and enters Waterscape in DAME Awards *Feature
Roads and Maritime Services seeks proposals for vessel suppliers
Keep Australia Fishing - Sydney Marine Park comments
Unmanned aerial vehicle offers new view of killer whales   
New equipment boosts NSW marine pollution response   
A collaborative effort to understand and monitor marine biodiversity   
Mapping the Antikythera Shipwreck   
GC International Marine Expo: Sirroco RIB + engine up for grabs   
BIA responds to Sydney Marine Park proposal   
NSW Wear a lifejacket campaign - Collaboration the key to success   
TV awareness campaign calls on boaties to be safe on the water   
Anglers urged 'release or return' if catch is carrying research tags   
Lifejackets do save lives - Wear yours on board this long weekend   
Mercury Marine produces 75,000th Verado L6 outboard engine   
Sydney Harbour Marine Park would attract Industry compensation claims   
Get set for the Sportjet   
2014 Auckland on the Water Boatshow hailed a huge success   
Dredging of Swansea Channel gets underway   
Have trailer, will travel *Feature   
Auckland On The Water Boat Show: Images from the final day   
Marine Wind Farms - coming to your cruising waters, what to do?   
Kite Foil Gold Cup Australia 2014 – Day two video   
Auckland On the Water Boat Show: World record mark set on Lancer SUP   


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