sail-world.com
 
 
News Home Cruising Australia Cruising USA Cruising Canada Boats for Sale Sail-World Racing Photo Gallery FishingBoating
Photo Gallery FishingBoating Video Gallery Newsletters
Sail-World.com : Baby Nemos finding their way home
Baby Nemos finding their way home

'Baby Nemos finding their way home.'    ARC Centre of Excellence Coral Reef Studies ©    Click Here to view large photo

Fish larvae on the Great Barrier Reef can find their way home after weeks of drifting in the sea even where the currents are strong, thanks to their senses of smell and hearing, two James Cook University researchers have found.
JCU Professors Eric Wolanski and Mike Kingsford published their findings in their paper, Oceanographic and behavioural assumptions in models of the fate of coral and coral reef fish larvae.

The paper has been published in the Journal of the Royal Society Interface, a journal that aims to link physics and biology.

Professor Wolanski, from TropWater and the School of Marine and Tropical Biology, said fish larvae showed they used the two senses to find their way home.

'Knowing that these larvae can orientate and swim to reefs using the senses of smell and hearing, we demonstrated with modelling that 20 per cent of these actively swimming fish larvae can return,' he said.

'This is compared to less than two per cent for passively drifting coral larvae.

'Importantly, many more fish larvae end up on other reefs nearby and replenish fish stocks in fished areas. This means that the marine protected areas help resupply fish to fished reefs outside marine protected areas.'

Professor Wolanski explained that after hatching, fish larvae cannot swim and are dispersed by ocean currents.
However, when the larvae have grown a dorsal bone, they can swim.

'They have a well-developed sense of smell, as revealed by experiments, and they swim horizontally using the smell cue towards home, that is, the reef where they were spawned,' he said.

'The fish larvae can also hear, and experiments have shown that they also swim to the sounds of life on the reef.'
Professor Wolanski said it was important that they return to their natal (or home) reef.

'If they don’t, the population will die because initially the fish larvae are moved away by the currents from their natal reefs. To maintain the population, some larvae must come back.'

The findings came after researchers developed a predictive model to find out what the fish and coral larvae were doing.
'The two senses can maximise the chances that they come back to the natal reef – the smell makes them come back in the general direction and, when they get close enough, the sound gives them a precise bearing,' he said.

'However for those larvae that have drifted too far away from the natal reef and can’t come back, they are not
necessarily going to be lost at sea and die.

If they come within hearing distance – one to two kilometres – of another reef, they can swim to it. This is how MPAs help replenish fish in fished areas.'

Professor Wolanski said importantly, the study demonstrated the usefulness of marine protected areas.

'It shows that a large number of coral reef fish larvae from an MPA are dispersed away by oceanic currents, but these larvae are not necessarily lost at sea and bound to die; using sound, these larvae can recruit in large numbers to reefs outside of the MPAs. In other words, MPAs help replenish fish stocks in fished areas.'


by ARC Centre of Excellence Coral Reef Studies


  

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

http://www.sail-world.com/index.cfm?nid=124414

7:39 AM Sun 13 Jul 2014GMT


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







Sail-World Cruising News - local and the World



The Galley Guys take on the Vancouver International Boat Show by Greg Nicoll with Frank Leffelaar and Friends,










Remember to properly dispose of obsolete distress beacons by Australian Maritime Safety Authority,




World ARC fleet bids farewell to Bali by World Cruising Club,














World ARC crews in Bali by World Cruising Club,


Could your sailing navigation use a tune-up? by Captain John Jamieson, Florida












The Boat Cookbook by BoatBooks,










World ARC fleet now arriving in Bali by World Cruising Club,












World ARC fleet to enter Indian Ocean for the first time
What can you do to prevent electrocution and ESD?
Pack this sailing gear for 'hands-free' lighting
Salty Dawg Rally Seminar Series planned October 8 in Annapolis
Europe tightens up on skippers competency certification
World ARC fleet departs Darwin under full sail
NOAA expedition discovers ship’s timepiece silent for nearly 200 years
Blue Planet Odyssey - Northwest Passage gate opens
A Cruising Guide to the Dominican Republic 6.0 now available
BNS Leopold I to commence counter-piracy operations
Africa Europe Challenge introduces 'Spectator's Package'
Wanted youth circumnavigators on a 'Voyage of Imagination'
Niagara-on-the-Lake, a popular cruising destination in Canada
The crowd-pleasing comforts of catamaran cruising
Death by Dinghy
'Sailing Stones' of Death Valley seen in action for the first time
Coast Guard searching for two boaters near St. Petersburg
20 coral species listed as threatened under the Endangered Species Act
Shanghai to San Francisco in under 2 hours via supersonic sub
PSP Southampton Boat Show 2014 - 2 for £24 ticket offer ends soon
A case of crossed wires? A shocking situation!   
How amazingly awe-inspiring the Arctic really is   
New atlas provides thorough audit of marine life in the Southern Ocean   
European Odyssey boats arrive in Lanzarote + Video   
Multiagency rescue at Dunraven Bay + Video   
Canal Boating in the Alsace with the Galley Guys   
World ARC fleet arrives in Darwin   
Dangers of the Dinghy trip back to your boat   
European Odyssey visits Porto   
Timeless Tonga - Charter sailing in a Polynesian paradise *Feature   
A fine conclusion to the ARC Baltic 2014   
Where in the world are our strongest corals?   
Baltic 4 Nations fleet arrive into Stralsund City Marina   
Huff of Arklow nearing completion, expected on the water next month   
Incredible efforts to save yacht from being lost at sea   
ARC Baltic fleet visit six countries and six capitals in six weeks   
Helen Island, Palau -a beautiful and unique place   
Bart's Bash: Over 2300 entered from 588 yacht clubs - Join here   
Barnacle Busting   
From Penguins to Polar Bears   


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 CRU NH
LocalAds   DE  ES  FR  IT