ScubaZine is a Scuba information Server. Providing information on scuba diving places, Scuba Diving services and people around the world. All searchable and can be added to
Images and Movies from the site. Forums on Scuba Diving Links to other Scuba diving related sites
ScubaZine home page Scuba Diving Locations from around the World Creatures of the Deep Scuba Diving  Clubs or Scuba Diving Services from around  the World Reviews of Scuba Diving services and products Employement seeking serivce for the Scuba Diver SShop online with ScubaZine
Critters
 ScubaZine ForumsGeneral DiscussionCritters
Message Icon Event: Hammerhead Shark Superhighway - Event Date: 04 Apr 2008 Post Reply Post New Topic
Author Message
scubazine
ScubaZine User
ScubaZine User
Avatar

Joined: 05 May 2007
Location: Australia
Online Status: Offline
Posts: 563
Quote scubazine Replybullet Calendar Event: Hammerhead Shark Superhighway
    Posted: 08 Apr 2008 at 07:20
A scientist hoping to save hammerhead sharks from extinction is leading a team of researchers who are tracking the fish underwater, hoping to prove the existence of a shark superhighway.

These unusual creatures, known for their oddly shaped heads that aid in navigating and finding food, were once plentiful in the world's oceans. Today their numbers have been decimated by fishermen.

For the past three decades Dr. Peter Klimley, a marine biologist at the University of California-Davis, has been studying hammerheads in the Pacific Ocean. He is now determined to discover their superhighway, a distinct route that he believes they travel within a network of favored destinations. If he can prove the route exists, he says, he can work to protect it.

"I think their taking the highways connecting these islands is an essential part of their conservation," Klimley said.

Klimley's team has embarked on the complicated task of outfitting a group of hammerhead sharks with high-tech tracking devices. "Each device has a train of beeps that is unique to this tag, and that way we can follow the shark as it moves around the island, or follow it as it moves between islands," Klimley said.

The tracking devices on 100 sharks quickly showed that they are sticking together. Many of the sharks were moving between Wolf and Darwin Islands in the Galapagos, about 25 miles apart. But one female shark took a 600 mile journey to the Cocos Islands near Costa Rica, then returned to the Galapagos.

The islands are connected by an undersea ridge, a feature that Klimley thinks the sharks might be using to navigate.

If he and his team can prove that this is the shark superhighway, thousands of sharks can be saved. To do it, they'll need to track the sharks with more sophisticated satellite equipment. But it won't be easy.

"Hammerheads in general tend to be particularly delicate sharks," he said.

Capturing and tagging an adult hammerhead is incredibly difficult because these sharks must always be swimming forward in order to keep oxygenated water moving over their gills; otherwise they will quickly suffocate and die. Scientists estimate they have five minutes or less to make it happen.

The crew inserts a water hose into the shark's mouth, but it's only a temporary lifeline and a race against time to attach the tracking device to its dorsal fin. Their mission is part of a new National Geographic Explorer special. Click here to find out more about the "Shark Superhighway" on National Geographic's Web site.



Source:http://www.abcnews.go.com/GMA/AsSeenOnGMA/story?id=4583142&page=1
_________________________
IP IP Logged
Post Reply Post New Topic
Printable version Printable version

Forum Jump
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum



This page was generated in 0.046 seconds.
Top Scuba Sites - Best Scuba Diving Sites Diver Directory - Links to Scuba Diving Websites