sail-world.com
 
 
News Home Boats for Sale MarineBusiness-World Sail-World Racing Cruising Int Magnetic Is RW Photo Gallery FishingBoating
Sail-World.com : When whales and oil rigs meet
When whales and oil rigs meet


'Whales tails - numbers are gradually growing'    .

Whale - When Whales and Oil Rigs Meet -  .. .  
Humpback whales, ocean-going giants, face threats from offshore oil platforms and related infrastructure, according to a study that also revealed new secrets about the whales' migration patterns.

When you are 50 feet long and weigh more than 40 tons – the maximum allowed weight on most U.S. highways – you need a lot of space to move around.

Humpback whales, still recovering from whaling that wiped out as much as 90 percent of their global population, are confronted with new challenges caused by hydrocarbon extraction, shipping routes, and ocean-based pollutants, according to a study co-authored by Sara Maxwell, a biology postdoctoral scholar affiliated with the Stanford Woods Institute for the Environment.

The study, published Feb. 5 in the journal Conservation Biology, finds that humpback whales migrating from breeding grounds off the coast of Africa must navigate past offshore oil and gas rigs, vessels in shipping lanes, and encounter the potentially harmful toxicants that accompany them.

'Knowing not just where animals are going, but what kind of human activities and potential threats they are facing gives us insight into how we can effectively help them while still maintaining the services that we as humans rely on in the ocean,' Maxwell said.

Using satellite tags, the researchers tracked 15 whales’ massive journeys, some more than 4,970 miles, between sub-Antarctic feeding grounds and African near-shore breeding grounds, among other areas.

The whales spent the most time in the national waters of Cameroon, Gabon, Nigeria and Angola, areas overlapped with offshore hydrocarbon operations and major shipping lanes. Overall, the whales spent an estimated 41.4 percent of the study period near oil and gas platforms. They spent nearly 76 percent of their time within 200 miles of the coast, a zone in which individual countries have rights granted by international law over the exploration and use of marine resources, including energy production.

Data on certain impacts on whales in this region is limited, but there is extensive evidence of ships striking whales off the California coast, where numerous programs have been put in place to mitigate the problem, Maxwell said.

'There are indications that oil production in these coastal regions has and will increase in the coming years,' said study lead author Howard Rosenbaum, director of the Wildlife Conservations Society’s Ocean Giants program. 'So gaining a better understanding of the movements of whales and quantifying the degree of overlap with anthropogenic activities will help assess the potential risks to this population, and identify mitigation strategies that should be considered to better protect whales.'

The satellite data contained some surprising results: While several whales predictably remained in the offshore waters of Gabon or traveled south, nearly half of the tagged group (including two females with calves) moved north into a previously unknown part of the breeding range for humpbacks off the coast of Gabon.

While migration patterns of humpbacks have been the subject of extensive study in other ocean basins and regions, the direct movements of humpbacks along the western African coast in the eastern South Atlantic have only recently come to light. The study’s discovery prompted Maxwell to say, 'We are still in an age of discovery when it comes to these ocean giants.'


by Rob Jordan

  

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

http://www.sail-world.com/index.cfm?nid=119150

4:07 AM Mon 10 Feb 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













4.8 million Legos all at sea by Adam Clark Estes,












In search of the Duroc by Jack Binder, Coral Sea




Dredging activity near corals can increase frequency of diseases by ARC Centre of Excellence Coral Reef Studies,




Understanding the Ocean's role in Greenland Glacier melt by Woods Hole Oceanographic Institution (WHOI),


Dangerous conditions for boating on entire NSW Coast by Transport Roads and Maritme Services,


Three Defensive Docking Strategies for Sailors by Captain John Jamieson, Florida


Revealing report on Search for American yacht Nina released *Feature by Rob Kothe and the Sail-World team,








AYSS PacificNet/Tahiti voted a success! by Asia Pacific Superyachts,














Baby Nemos finding their way home by ARC Centre of Excellence Coral Reef Studies,






Blue Planet Odyssey, around world rally, begins
Africa Europe Cruising Challenge now open for entries
The real ‘Supermoon’ story
Warm and noisy welcome for Oceans of Hope in La Rochelle
Sailor rescued after Facebook call for rescue
Solo sailing star's passion = busy environmental schedule
El Niño (Part 2). Effects on the Pacific Ocean
Northern Scotland: Voyage to Orkney and Shetland Isles (Part 1)
Northern Scotland: Voyage to Orkney and Shetland Isles, photos
The Galley Guys' favourite shrimp recipe
Dangerous conditions forecast for NSW boaters
Vestas Sailrocket 3 - Over the Horizon
Rescued sailors reach shore after dramatic ocean rescue
Yacht abandoned 170nm north of New Zealand, navigation warning out
Tidal current installations will increase boating hazards
Abell Point Marina looking shipshape
Dangerous conditions for NSW coastal boaters from Thursday
Oceanis 48 at the Sydney International Boat Show
Eco-Sailboat of the future - Catherine Chabaud at work
Calling yachts in the South Pacific - rally to New Zealand
The final touch - which wax should I use on my boat?   
ARC Baltic sets sail to discover Europe's 'east sea'   
Auckland On Water Boat Show to hold world record attempt   
Another boom death. Australian sailor dies, hit by swinging boom   
Galley Guru vital to the life of the cruising sailor   
Auckland Cruisers - seminar on cruising sails   
'Boat Handling in Marinas' by Rob Gibson - and how to get it reliably   
Heart-stopping moment as whale capsizes Zodiac   
Lessons from the West: Great Barrier Reef in danger   
Climate change could stop fish finding their friends   
Vanuatu ups their welcome to cruising sailors with new approach   
Criminal charges mooted for owners of sunk HMS Bounty   
Yachting Australia announces resignation of CEO Phil Jones   
Red faces after authorities inadvertently aid boat thief to get away   
Mobiles drive traffic - 72% increase in Sail-World.com page view *Feature   
New import permit for Mexico resolves impound problems   
Captain Phillips and Obama admin wants pirates' nests eradicated   
Sail Estonia: a VERY new idea   
Tie This 'Lifesaving' Bowline in Seconds - the easy way!   
A Beer Bummel on the Thames River   


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 WAS Cru SH
LocalAds   DE  ES  FR  IT