>
 
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

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]  

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]  

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 by Boating Industry Association
Discover Boating Week is a celebration of the recreational boating lifestyle and the joys and fun that come with spending quality time on the water. Whether you're a fisherman, paddler or sailor, there is something for everyone. Over 40 events will be taking place across the state from October 18 - 25 and the best part is, they all absolutely free! ... [more]  

Great start to another massive Gold Coast International Marine Expo by Emma Milne/Gold Coast International Marine Expo
The Gold Coast International Marine Expo – open all weekend – is a marquee event for the marine industry and has delivered on its promise of 'all things aquatic – from super yachts and jet skis to kayaks and fishing equipment … and everything in between'. ... [more]  

Boaters are reminded to keep clear of a section of Sydney Harbour on Sunday 26 October for the safe staging of The Australian Boat Race. ... [more]  

The Queensland Boating and Fisheries Patrol’s Marine Animal Release Team has successfully freed a juvenile whale from shark nets off Rainbow beach on the Sunshine Coast this afternoon. Queensland Shark Control Program Manager Jeff Krause, from the Queensland Boating and Fisheries Patrol, said the five metre whale was badly entangled in the net. ... [more]  

2014 Gold Coast International Marine Expo - With less than 24 hours until the start of the three-day 2014 Gold Coast International Marine Expo, the event site is a hive of activity as exhibitors prepare and polish their displays to help you make this summer one to remember. ... [more]  

Boats recovery after Sydney storm by Roads and Maritime Services
Roads and Maritime Services Maritime Director Angus Mitchell said Roads and Maritime Services boating safety officers (BSO) had been busy since sunrise in Port Hacking helping with the recovery of more than 10 boats which broke their moorings overnight during stormy conditions. ... [more]  

MMC have donated 300 new generation lifejackets to Rowing NSW so their coaches and instructors can act as ambassadors by wearing them and role modelling behaviour to further encourage everyone on the water to wear lifejackets. ... [more]  

Most boaters start the new boating season safely by Roads and Maritime Services
The results are in from the first boating campaign of the new season with a reminder for boaters to keep an eye on their speed and ensure they are aware of NSW lifejacket laws. ... [more]  

Is the Quagga mussel in your cruising waters?The Quagga mussel has been discovered for the first time in the UK. The discovery was made by Environment Agency teams carrying out routine water quality testing on River Wraysbury. It has subsequently been found in the nearby Wraysbury reservoir too. ... [more]  

To celebrate the start of the recreational boating season, Discover Boating Week will run from October 18 to 26. The public are invited to learn more about recreational boating through dozens of activities that have been organised by industry members and associated boating groups. ... [more]  

Boaters are reminded to keep clear of a section of Lake Mulwala this weekend for the safe staging of the Yarrawonga Mulwala Multisport Festival. ... [more]  

The 605 Sportsfish gives you such a good fishing experience you might not notice how safe it is! A hinged gate provides sea-height access to the transom. Starboard and port walk rounds provide fast accessibility to all areas of the boat. And a bow windlass option makes it easier than ever to drop anchor. ... [more]  

Nature’s Own founder Vaughan Bullivant had previously hoped to get around $65 million for the Daydream Island resort he paid $25 million for in 2000. But with his health deteriorating and the island failing to sell in two years, agents have convinced Mr Bullivant to lower his expectations — and the price — to about $30 million. ... [more]  

Update: Stunning finds from ancient Greek Shipwreck by Woods Hole Oceanographic Institution
The rescued antiquities include tableware, ship components, and a giant bronze spear that would have belonged to a life-sized warrior statue. The Antikythera wreck was first discovered in 1900 by sponge divers who were blown off course by a storm. ... [more]  

Recreational fishing in the Campaspe River is set to improve thanks to a $155,000 investment from the Victorian Coalition Government to improve fish habitat. Minister for Water Peter Walsh today officially opened the new ‘rock fishway’ at Echuca Weir, which has been funded through the Coalition Government’s $3.73 million Caring for the Campaspe initiative. ... [more]  

The Australian National Maritime Museum is delighted to announce that whale expert Geoffrey Ross from New South Wales National Parks and Wildlife Service will be joining the HMB Endeavour crew as a special guest when it embarks on a special whale-themed voyage from Sydney to Eden 27 - 31 October. ... [more]  

Boaties are in for a real treat – a multitude of esteemed boat-builders have reserved the 2014 Gold Coast International Marine Expo to unveil their latest new models to the public. The vast range of new and innovative vessels covers the entire spectrum of on-water enjoyment, from luxurious sports yachts and specialist fishing vessels to family recreation boats and inflatable dinghies. ... [more]  

Superior will be attending this year’s METS trade show in Amsterdam, 18 to 20 November, and entering the company’s new Waterscape product in the prestigious DAME Awards. ... [more]  

Roads and Maritime Services seeks proposals to establish a panel of prequalified vessel suppliers that can be accessed by NSW Government Marine Compliance Task Force members – RMS Maritime Division, NSW Police Marine Area Command and Department of Primary Industries (Fisheries). ... [more]  

Keep Australia Fishing - Sydney Marine Park comments by Rob Kothe & the MarineBusiness-world team
Keep Australia Fishing is extremely concerned that the NSW Labor Party has sided with anti-fishing activists in proposing the establishment of a marine park in the Sydney area. If this eventuates, the marine park as proposed will severely limit recreational fishing opportunities in and around Australia's largest city. ... [more]  

For the first time, scientists have used an unmanned aerial vehicle to study killer whales from above. The device they're using is a remote-controlled hexacopter with a high-resolution camera mounted in its belly, and the photos it produces are beautiful and full of detail. The images offer an entirely new view of this species. ... [more]  

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
Marine Rescue Forster Tuncurry recognised with Water Safety Week Award
Marine Rescue NSW wins 2014 NSW Water Safety Awards   
New maps of the polar regions reveal unseen world beneath the ice   
Marine Rescue Point Danger assists disabled yacht to safety   
A win for sharks   
SOS Marine and Mobilarm launch sMRT Inflatable SOS Dan Buoy   
RBT only applies when vessel is underway   
Recreational Fishing Trust Update   
BIA and MIMRA at RMS Boating Safety Day!   
Predictwind and Iridium offer Sat Phone comms at Mobile Phone pricing   
Gold Coast Marine Expo: Riviera 6000 Sport Yacht’s Queensland premiere   
Bass Strait 40 - Sensational Cheese, Superb Wine and Stunning Boats   
SA marinas and yacht clubs to open their gates on SA Marina Day   
BRIG Navigator 700 – big boat for your buck *Feature   
Bright future for Port Phillip snapper stocks   
Spring time auction a success for Marine Auctions   
Marine Auctions gets on the social media boat   
Marine15: Submit your 'Best Profit Idea' and win! *Feature   
Iconic dealership celebrates 50 years *Feature   
Fraser Island closed waters re-open   
Divers home in on thorny threat   


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