HOME >> BIOLOGY >> NEWS
One fish, two fish: New MIT sensor improves fish counts

Researchers at MIT have found a new way of looking beneath the ocean surface that could help definitively determine whether fish populations are shrinking.

A remote sensor system developed by Associate Professor Nicholas Makris of mechanical engineering, along with others at MIT, Northeastern University and the Naval Research Laboratory, allows scientists to track enormous fish populations, or shoals, as well as small schools, over a 10,000-square-kilometer area - a vast improvement over conventional technology that can survey only about 100 square meters at a time.

"We're able to see for the first time what a large group of fish looks like," said Makris, who compared the dramatic improvement to the difference between seeing everything on a television screen and seeing only one pixel.

The new sensor system, described in the Feb. 3 issue of Science, could allow government agencies to figure out what's really happening to fish populations, which many environmentalists and scientists believe are in rapid decline.

"The world's fish stocks are being depleted at a horrible rate," said Makris, who attributed declining populations to overfishing, a problem that has been abetted by inaccurate fish counts. "One of the reasons (for the inaccurate counts) is the darkness in the ocean. You don't know what's going on."

Current surveying methods depend on highly localized observations taken from slow-moving research vessels, which provide only a small amount of data about a large shoal, Makris said. "It would be like watching 'Casablanca' and you're seeing one pixel moving across the screen, and that's all you get. You can't figure out what's going on, it's way too slow," he said.

Both the new and old methods rely on sonar, which locates objects by bouncing sound waves off of them. With the old technique, survey vessels send high-frequency sonar beams into the ocean, where they dissipate much like the light from a flashlight shining
'"/>

Contact: Elizabeth Thomson
thomson@mit.edu
617 258-5402
Massachusetts Institute of Technology
2-Feb-2006


Page: 1 2

Related biology news :

1. Ancient predator had strongest bite of any fish, rivaling bite of large alligators and T. rex
2. By 2048 all current fish, seafood species projected to collapse
3. Salmon farms kill wild fish, study shows
4. For some young fish, early gene expression is a clear harbinger of fated lifestyle
5. Ocean dead zones trigger sex changes in fish, posing extinction threat
6. Sudden change in social status triggers genetic response in male fish, study finds
7. Zebrafish: Its not your parents lab rat
8. Early bird caught the fish: Fossils depict aquatic origins of birds 115 million years ago
9. Disabling a sensory organ prompts female mice to act like male mice
10. A sensory organ, not the brain, differentiates male and female behavior in some mammals
11. Space-borne sensors help Africa tackle water shortage problems

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/1/2020)... ... May 01, 2020 , ... More than 600 people undergo genetic counseling and ... which is led by two genetic counselors. , My Gene Counsel , a ... up with UConn’s High Rick Program to ensure that UConn’s patients who have undergone ...
(Date:4/30/2020)... (PRWEB) , ... April 28, 2020 , ... ... webinars are Lachman Consultants latest effort in providing timely and critical information to ... complicated by social distancing and health safety concerns. , “Providing the most up-to-date ...
(Date:4/28/2020)... ... April 27, 2020 , ... Ofee.com, an online ... three teenagers with an idea to help millions of people during the coronavirus ... great need and suffering, an outlet has been created for people to meet ...
Breaking Biology News(10 mins):
(Date:5/5/2020)... ... May 05, 2020 , ... ... today the launch of its iGlucose® LTE Cat-M Cellular Connected Diabetes ... LTE Cat-M1 technology, the industry’s newest and broadest cellular connectivity available, to provide ...
(Date:4/22/2020)... (PRWEB) , ... April 21, 2020 , ... ... FXIII chromogenic method for determination of FXIII. , Aniara Diagnostica, a multi-national distributor ... commitment to meeting today’s highest standards for product quality and cost-efficient delivery. ...
(Date:4/1/2020)... LEXINGTON, Ky. (PRWEB) , ... March 30, 2020 ... ... the launch of its latest product, ArmourGuard® RTU, an EPA-approved spray-on antimicrobial solution. ... the only biosecurity solution that provides continual antimicrobial activity against microorganisms for up ...
(Date:3/27/2020)... ... March 25, 2020 , ... ... of its veterinary histopathology laboratory located centrally in the midwest for high-quality, ... to work with a highly motivated, independent, professional team that is focused ...
Breaking Biology Technology:
Cached News: