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

 

Sail-World.com : Full moon sparks remarkable mass coral spawning

Full moon sparks remarkable mass coral spawning

One of the most spectacular natural events in Western Australia, the annual mass autumn spawning of corals, is predicted to occur off parts of the coast next week, between 27 and 30 March.

Department of Environment and Conservation Marine Science Program Leader Dr Chris Simpson said the event occurred in the Dampier Archipelago, Ningaloo Marine Park and Abrolhos Islands, over the period of the lowest tidal range, seven to ten nights after the full moon.

'This fascinating event in the coral reproductive cycle looks something like a pink, underwater snow storm and it attracts many divers and photographers each year,' Dr Simpson said.

'The coral spawning occurs at night, usually on an ebbing tide, beginning about an hour after sunset and continuing for two to three hours.

'Although most corals in WA spawn in autumn, a few species also spawn during spring, contrasting with the Great Barrier Reef where most corals spawn in spring/early summer.'

Dr Simpson said water temperatures along WA's coastline over the past few months had been unusually high, causing coral stress that results in coral bleaching and mortality if it persists.

'Bleaching has been recorded on many WA coral reefs in the past month, from the tropical north to the temperate coral reefs off Shark Bay and the Abrolhos Islands where it had not been previously observed,' he said.

'The higher than usual ocean temperatures are mainly due to the La Nina weather pattern which causes the Leeuwin Current to flow strongly along WA's coast bringing warm water further south than usual.

'La Nina is often also associated with calmer weather in WA, which reduces flushing of lagoon waters causing further warming of shallow, coastal waters by the sun.

'If calm conditions occur during the coral spawning period this year it will increase the risk of coral spawn slicks forming on the ocean surface reducing oxygen and causing mortality in coral, fish and other reef biota.'

Dr Simpson said these events had occurred several times on WA coral reefs in the past and were important natural disturbances on our reefs. He said coral spawn slicks were often confused with large algal blooms.

'These blooms are usually a reddish-brown in colour, earning them the name ‘red tide', and are often confused with the pink coral spawn which also floats on the sea surface.'

DEC is calling for people who see coral slicks, distressed, floating or washed up fish or bleached corals, to take photographs and record the time, date and location of these observations and pass this information onto their local DEC office.

'Public assistance will help us to better understand where these natural disturbances are occurring, which is likely to be in vulnerable areas like shallow, protected or semi-enclosed parts of bays and lagoons.'

Department of Environment and Conservation website




by Department of Environment and Conservation

  

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

http://www.powerboat-world.com/index.cfm?nid=81672

1:08 PM Thu 24 Mar 2011 GMT






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


Power Boat News

British luxury Motor Yacht manufacturer, Fairline Boats, has announced plans to introduce eight new models over the next three years, with full details to be unveiled at the London Boat Show in January 2015. The news follows on from Fairline’s recent announcement of a major human investment into its engineering capability. ... [more]  

A pivotal metropolitan marine communications centre has been upgraded in a $200,000 project to help safeguard boaters on Sydney Harbour and surrounding waters. The Speaker of the Australian Parliament and Member for Mackellar Bronwyn Bishop will today open the new-look Marine Rescue Terrey Hills radio base, which has been significantly refurbished to secure its operational capability. ... [more]  

The media conference marks the opening of the 2014 China (Macau) International Yacht Import and Export Fair, which will take place at the Grand Colane Resort from 7-9 November. The three-day fair promises to offer its valuable guests a vibrant experience of luxury lifestyle and oceanic culture. ... [more]  

Genoa International Boat Show 2014 ‘in recovery’ by Guy Nowell, Sail-World Asia, Hong Kong
Once upon a time, and not so very long ago, Genoa was very much the numero uno Mediterranean boat show, with 3,000+ boats in the water and practically every manufacturer on the planet anxious to be seen there. The combined effect of the financial crisis 2008-onwards and subsequent financial austerity measures imposed by the Italian government, including swingeing taxes on luxury products ... [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]  

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]  

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]  

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]  

Superior recently signed an MOU with South Korean manufacturer and marine industry proponent, Scotra. ... [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]  

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]  

The Barcelona International Boat Show closes its doors in Port Vell this afternoon and confirms a trend towards recovery in the sector. Over the course of five days, the show which presented 120 new products and 650 vessels recorded a large turnover and number of visitors, who were able to take an active part in more than 100 programmed activities. ... [more]  

There is still time to purchase a copy of the new RYA Advanced Powerboat Handbook by Paul Glatzel and be in with a chance of winning an RYA Advanced Powerboat course courtesy of the Paul’s RYA Training Centre, Powerboat Training UK. ... [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]  

Volunteer Marine Rescue Southport, at the top of the Gold Coast, now has more of both after fitting twin 300 hp Mercury Verado outboards onto it largest vessel, a 9.5 metre Noosa Cat 3100. ... [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]  

UIM Class 1 Grand Prix of Italy 2014 - Sunday, Terracina (Italy): Luca Fendi and Giovanni Carpitella produced a breath taking performance to take their first win together in C1 at the team’s home Grand Prix, with Aquasport’s Daniel Cramphorn and Nico Huybens producing a totally dominant performance to win in V1. ... [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]  

More than 13,000 visitors flocked to Scotland’s Boat Show 2014 (SBS14) at Kip Marina, Inverclyde last weekend as the boating world showed off everything from a £500 dinghy to an £800,000 Sunseeker luxury powerboat. SBS14 is the largest boat show in Scotland and the third largest in the UK and, with over £15m worth of boats on display, there was something for every budget. ... [more]  

Victory and Bernico-New Star took race 1 honours in a dramatic and incident-filled first race at the Grand Prix of Italy, which was stopped after a first corner spin-out by Tommy One after the start lap, forcing officials to bring out the red flag. ... [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]  

Alongside the line-up yachts and boats by international and local brands, visitors to this year’s Yacht CN will have a chance to enjoy the exciting Moto Surf China Race, passionate samba dances, bikini model shows, international music band performances, and popular international DJ music on-site. ... [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
2014 Fort Lauderdale International Boat Show - About to start
Changed boating conditions on Sydney Harbour for Australian Boat Race
Safer Boating Week puts spotlight on boaties’ behaviour
2014 Gold Coast Int'l Marine Expo - One more sleep until massive event
King of Offshore - The Untold Story of Reggie Fountain + Video
Italian Grand Prix - Teams head for title decider in Terracina
Boats recovery after Sydney storm
Partnership to encourage lifejacket use
Most boaters start the new boating season safely
Barcelona Int'l Boat Show - 120+ new products and a hundred activities
F1H2O Worlds 2014 - Qatar Team heads to Florida for more F1 testing
Discover Boating Week opens up opportunities to participate
Riviera owners find paradise in one of seven natural wonders
Changed boating conditions for Yarrawonga Multisport Festival
605 Sportsfish named Australia's Greatest Boats 2015 Finalist!
2014 Gold Coast International Marine Expo - Multihulls set to dominate
Update: Stunning finds from ancient Greek Shipwreck
Teams preparing for Key West 2015 season
Search for victims in challenging marine rescue test   
Gold Coast International Marine Expo - Boats to behold … and much more   
Sail Canada - Keel and Power Programs at AGM   
Superior set for METS and enters Waterscape in DAME Awards *Feature   
Roads and Maritime Services seeks proposals for vessel suppliers   
Ferretti Yachts 550 comes to light   
Vicsail - Boat Show Open Day - d'Albora Marina Rushcutters Bay   
Benetti launches Veloce 140 in the Fast Displacement series   
The future is now at 2014 Gold Coast International Marine Expo   
Grand Prix of China - France celebrates treble in Liuzhou   
2014 Gold Coast International Marine Expo - Futuristic and fun toys   
Super Boat National Championships - Great conditions for sixth edition   
Genoa International Boat Show 2014 – everything is relative   
GC International Marine Expo: Sirroco RIB + engine up for grabs   
BIA responds to Sydney Marine Park proposal   
TV awareness campaign calls on boaties to be safe on the water   
2014 NSW Discover Boating Week - Set to kick off this year’s summer   
Lifejackets do save lives - Wear yours on board this long weekend   
Recognition for boating community with Maritime Medal Awards   
Sydney Harbour Marine Park would attract Industry compensation claims   


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