Navigation Links
Underwater gliders may change how scientists track fish
Date:6/22/2010

Fairbanks, AlaskaTracking fish across Alaska's vast continental shelves can present a challenge to any scientist studying Alaska's seas. Researchers at the University of Alaska Fairbanks have successfully tested a possible solution in the form of underwater gliders.

Last month, Peter Winsor, associate professor of physical oceanography, and Andrew Seitz, assistant professor of fisheries, tested the use of autonomous underwater vehicles, called gliders, for tracking tagged fish. Winsor and Seitz suspended acoustic tags, usually implanted in fish, at different depths along a buoy line near Juneau. They then deployed two gliders fitted with an acoustic listening device to "hear" the signals from the tags.

Winsor and Seitz say these are the first gliders to be deployed in Alaska with an acoustic monitoring device to track tagged fish.

Each glider is about five feet long and flies like an airplane through the water in an up-and-down motion. They are propelled using an internal bladder that works much like a fish's swim bladder. When the bladder expands, the glider moves toward the surface. When it contracts, it moves toward the seafloor.

"They convert changes in water depth into forward movement," said Seitz.

The gliders move at a speed of nearly one mile per hour and can operate for up to three months. According to Winsor, the gliders can cover thousands of miles of ocean. At the surface, the glider transmits data, including its location and oceanographic readings, directly to scientists.

"With the gliders, we not only learn about where the fish go, but we can also measure the physical, chemical and biological environment of the ocean at the same time," said Winsor.

Traditional methods of tracking tagged fish include using a ship equipped with an acoustic listening device, or by using what scientists call a "listening line," which is a series of hydrophones attached to the seafloor.

"The problem with using hydrophones is that they stay in one place and the tagged fish have to move near enough to the hydrophones to be detected," said Seitz. "This can create big geographic gaps in your data, especially in the vast oceans surrounding Alaska."

Seitz and Winsor say that the gliders can be programmed to follow tagged fish. The technology is ideal for Alaska waters because the gliders can cover large distances and are much less expensive than using a ship or sets of hydrophones. Scientists are planning to use the gliders to gather oceanographic information in the Chukchi Sea.


'/>"/>

Contact: Carin Stephens
cbstephens@alaska.edu
907-322-8730
University of Alaska Fairbanks
Source:Eurekalert  

Related biology news :

1. Unveiling the underwater ways of the white shark
2. Underwater microscope helps prevent shellfish poisoning along Gulf Coast of Texas
3. School of Robofish provides basis for underwater robot teams
4. NJIT professors research suggests changes in underwater data communications
5. Little Salt Spring underwater archeological site in Florida receives new funding
6. An underwater drugstore?
7. Toward cheap underwater sensor nets
8. Scientists report first remote, underwater detection of harmful algae, toxins
9. MBARI sends underwater robot to study Deepwater Horizon spill
10. IEEE touts NJIT professor for expertise in underwater acoustic communication
11. Climate change goes underground
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Underwater gliders may change how scientists track fish
(Date:6/14/2017)... IBM ) is introducing several innovative partner startups at ... between startups and global businesses, taking place in ... startups will showcase the solutions they have built with IBM ... France is one of the most ... increase in the number of startups created between 2012 and ...
(Date:5/16/2017)... --  Bridge Patient Portal , an enterprise patient ... Systems , an electronic medical record solutions developer ... a partnership to build an interface between the ... products, including Centricity Practice Solution (CPS), Centricity Business ... integrations will allow healthcare delivery networks using GE ...
(Date:4/19/2017)... York , April 19, 2017 ... as its vendor landscape is marked by the presence ... market is however held by five major players - ... Together these companies accounted for nearly 61% of the ... the leading companies in the global military biometrics market ...
Breaking Biology News(10 mins):
(Date:7/14/2017)... ... July 13, 2017 , ... Dr. Joshua Mondlick has introduced the LANAP® protocol ... Mondlick Perio, in the Phoenix area. Dr. Mondlick is at the forefront ... cleared laser treatment to re-grow bone and with significantly less pain than traditional surgery ...
(Date:7/13/2017)... (PRWEB) , ... July 13, 2017 , ... Thousands of ... and August for the National Aeromodeling Championships (Nats). Pilots come to Muncie to compete ... to earn spots on US teams that participate in world championships. , RC Pylon ...
(Date:7/13/2017)... , ... July 13, 2017 , ... ... two spectrophotometer calibration standards. Blast forward seven years and now they are ... holmium oxide for wavelength accuracy, and resolution testing. , ...
(Date:7/13/2017)... ... July 13, 2017 , ... Trinity Sterile, ... reusable medical supplies has chosen The Copley Consulting Group to implement and deploy ... to align its internal and backend operations to streamline efficiencies to meet the ...
Breaking Biology Technology: